Compositions for Wetness Indication

Abstract

A composition, and methods of making and using such a composition, whereby the composition can include a printable ink formulation having a colorant which undergoes a visible color change upon exposure to a wetness threshold. The colorant can be highly resistant to leaching. Additionally, the colorant can be resistant to premature activation via ambient moisture or humidity.

1 . A composition comprising:
 a colorant which undergoes a visible color change upon exposure to a wetness threshold; and   a leaching inhibitor;   wherein, following application to a substrate, said colorant resists leaching from said substrate by being chemically bound to said leaching inhibitor.   
     
     
         2 . The composition of  claim 1 , said colorant formulated into a printable ink formulation. 
     
     
         3 . The composition of  claim 2 , said printable ink formulation configured for printing on said substrate. 
     
     
         4 . The composition of  claim 2 , said printable ink formulation in a liquid state at room temperature. 
     
     
         5 . The composition of  claim 2 , said printable ink formulation in a liquid state at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         6 . The composition of  claim 2 , said printable ink formulation consisting essentially of one or more components that are liquid at room temperature. 
     
     
         7 . The composition of  claim 2 , said printable ink formulation consisting essentially of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         8 . The composition of  claim 2 , said printable ink formulation consisting of one or more components that are liquid at room temperature. 
     
     
         9 . The composition of  claim 2 , said printable ink formulation consisting of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         10 . The composition of  claim 2 , said printable ink formulation consisting essentially of liquid at room temperature. 
     
     
         11 . The composition of  claim 2 , said printable ink formulation consisting essentially of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         12 . The composition of  claim 2 , said printable ink formulation consisting of liquid at room temperature. 
     
     
         13 . The composition of  claim 2 , said printable ink formulation consisting of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         14 . The composition of  claim 2 , said printable ink formulation formulated as a flexographic ink. 
     
     
         15 . The composition of  claim 14 , said flexographic ink formulated for high-speed printing. 
     
     
         16 . The composition of  claim 14 , said flexographic ink formulated for printing at a speed of at least about 1,000 feet/minute. 
     
     
         17 . The composition of  claim 14 , said flexographic ink providing a dry film having a thickness of about 4-8 microns. 
     
     
         18 . The composition of  claim 2 , said printable ink formulation formulated as a gravure ink. 
     
     
         19 . The composition of  claim 18 , said gravure ink formulated for high-speed printing. 
     
     
         20 . The composition of  claim 18 , said gravure ink formulated for printing at a speed of at least about 1,000 feet/minute. 
     
     
         21 . The composition of  claim 18 , said gravure ink providing a dry film having a thickness of about 4-8 microns. 
     
     
         22 . The composition of  claim 2 , said printable ink formulation formulated as a digital printing ink. 
     
     
         23 . The composition of  claim 2 , said printable ink formulation formulated as an ink for printing via an inkjet printer. 
     
     
         24 . The composition of  claim 2 , said printable ink formulation formulated as an ink for printing via a laser printer. 
     
     
         25 . The composition of  claim 2 , said printable ink formulation further comprising a solvent. 
     
     
         26 . The composition of  claim 25 , wherein said colorant and said leaching inhibitor are dispersed in said solvent. 
     
     
         27 . The composition of  claim 25 , wherein said colorant and said leaching inhibitor are dissolved in said solvent. 
     
     
         28 . The composition of  claim 25 , wherein said colorant and said leaching inhibitor are solubilized in said solvent. 
     
     
         29 . The composition of  claim 25 , wherein said solvent comprises a volatile solvent. 
     
     
         30 . The composition of  claim 29 , wherein at least a portion of said volatile solvent evaporates upon said printing. 
     
     
         31 . The composition of  claim 25 , said solvent in a liquid state at room temperature. 
     
     
         32 . The composition of  claim 25 , said solvent in a liquid state at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         33 . The composition of  claim 25 , said solvent consisting essentially of one or more components that are liquid at room temperature. 
     
     
         34 . The composition of  claim 25 , said solvent consisting essentially of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         35 . The composition of  claim 25 , said solvent consisting of one or more components that are liquid at room temperature. 
     
     
         36 . The composition of  claim 25 , said solvent consisting of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         37 . The composition of  claim 25 , said solvent consisting essentially of liquid at room temperature. 
     
     
         38 . The composition of  claim 25 , said solvent consisting essentially of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         39 . The composition of  claim 25 , said solvent consisting of liquid at room temperature. 
     
     
         40 . The composition of  claim 25 , said solvent consisting of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         41 . The composition of  claim 25 , wherein said printable ink formulation does not include a solvent which is solid or meltable at room temperature. 
     
     
         42 . The composition of  claim 25 , wherein said printable ink formulation does not include a solvent which is solid or meltable at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         43 . The composition of  claim 25 , wherein said printable ink formulation is devoid of a solvent which is solid or meltable at room temperature. 
     
     
         44 . The composition of  claim 25 , wherein said printable ink formulation is devoid of a solvent which is solid or meltable at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         45 . The composition of  claim 25 , wherein said solvent comprises one or more alcohols. 
     
     
         46 . The composition of  claim 25 , wherein said solvent consists essentially of one or more alcohols. 
     
     
         47 . The composition of  claim 25 , wherein said solvent consists of one or more alcohols. 
     
     
         48 . The composition of  claim 25 , wherein said solvent comprises one or more acetates. 
     
     
         49 . The composition of  claim 25 , wherein said solvent consists essentially of one or more acetates. 
     
     
         50 . The composition of  claim 25 , wherein said solvent consists of one or more acetates. 
     
     
         51 . The composition of  claim 25 , wherein said solvent comprises a mixture of at least two said solvents. 
     
     
         52 . The composition of  claim 25 , wherein said solvent comprises a mixture of at least two alcohols. 
     
     
         53 . The composition of  claim 25 , wherein said solvent comprises a mixture of at least one alcohol and at least one acetate. 
     
     
         54 . The composition of  claim 25 , wherein said solvent comprises or consists essentially of or consists of one or more organic solvents. 
     
     
         55 . The composition of  claim 25 , said printable ink formulation further comprising a resin. 
     
     
         56 . The composition of  claim 55 , wherein said colorant, said leaching inhibitor, and said resin are dispersed in said solvent. 
     
     
         57 . The composition of  claim 55 , wherein said colorant, said leaching inhibitor, and said resin are dissolved in said solvent. 
     
     
         58 . The composition of  claim 55 , wherein said colorant, said leaching inhibitor, and said resin are solubilized in said solvent. 
     
     
         59 . The composition of  claim 55 , wherein said resin functions as a binder to facilitate adhesion of said colorant to said substrate. 
     
     
         60 . The composition of  claim 55 , wherein said resin comprises a polyvinyl butyral. 
     
     
         61 . The composition of  claim 55 , wherein said resin comprises a polyketone resin. 
     
     
         62 . The composition of  claim 55 , wherein said resin comprises a polyamide resin. 
     
     
         63 . The composition of  claim 55 , wherein said resin comprises a phenolic resin. 
     
     
         64 . The composition of  claim 55 , wherein said resin comprises a fumaric resin ester. 
     
     
         65 . The composition of  claim 55 , wherein said resin comprises a polyurethane resin. 
     
     
         66 . The composition of  claim 55 , wherein said resin has a relatively high solubility in organic solvents. 
     
     
         67 . The composition of  claim 2 , wherein said visible color change is irreversible. 
     
     
         68 . The composition of  claim 2 , wherein said colorant comprises a first color state associated with a first state of said composition. 
     
     
         69 . The composition of  claim 68 , wherein said colorant comprises a second color state associated with a second state of said composition. 
     
     
         70 . The composition of  claim 69 , wherein said second color state is visibly different from said first color state. 
     
     
         71 . The composition of  claim 70 , said printable ink formulation configured as a urine indicator. 
     
     
         72 . The composition of  claim 71 , wherein said colorant comprises a pH-sensitive colorant. 
     
     
         73 . The composition of  claim 72 , wherein said pH-sensitive colorant undergoes said visible color change upon exposure to a pH threshold. 
     
     
         74 . The composition of  claim 73 , said pH threshold associated with a pH of about 5.5 to about 8.0. 
     
     
         75 . The composition of  claim 73 , said pH threshold associated with urine. 
     
     
         76 . The composition of  claim 74 , said second state of said composition associated with said pH threshold. 
     
     
         77 . The composition of  claim 75 , said second state of said composition associated with said pH threshold. 
     
     
         78 . The composition of  claim 73 , said colorant neutral in charge at a pH below that of urine. 
     
     
         79 . The composition of  claim 78 , said colorant anionic after contact with said urine. 
     
     
         80 . The composition of  claim 73 , said colorant a sulfonephthalein. 
     
     
         81 . The composition of  claim 73 , said colorant comprising bromophenol blue. 
     
     
         82 . The composition of  claim 73 , said colorant consisting essentially of bromophenol blue. 
     
     
         83 . The composition of  claim 73 , said colorant consisting of bromophenol blue. 
     
     
         84 . The composition of  claim 73 , wherein said colorant comprises a mixture of at least two said colorants. 
     
     
         85 . The composition of  claim 2 , said printable ink formulation comprising said leaching inhibitor. 
     
     
         86 . The composition of  claim 85 , wherein said leaching inhibitor functions to immobilize said colorant relative to said substrate when said colorant is chemically bound to said leaching inhibitor. 
     
     
         87 . The composition of  claim 86 , wherein said leaching inhibitor is cationic. 
     
     
         88 . The composition of  claim 87 , wherein said cationic leaching inhibitor associates with an anionic form of said colorant to form a complex thereof. 
     
     
         89 . The composition of  claim 88 , wherein formation of said complex neutralizes the charge of both said anionic form of said colorant and said leaching inhibitor. 
     
     
         90 . The composition of  claim 89 , wherein said complex is substantially insoluble or insoluble in hydrophilic media. 
     
     
         91 . The composition of  claim 89 , wherein said complex is substantially insoluble or insoluble in urine. 
     
     
         92 . The composition of  claim 86 , wherein said leaching inhibitor comprises a quaternary ammonium compound. 
     
     
         93 . The composition of  claim 86 , wherein said leaching inhibitor consists essentially of a quaternary ammonium compound. 
     
     
         94 . The composition of  claim 86 , wherein said leaching inhibitor consists of a quaternary ammonium compound. 
     
     
         95 . The composition of  claim 86 , wherein said leaching inhibitor is selected from the group comprising or consisting of: dialkyl dimethyl ammonium quaternary compounds; alkyl trimethyl ammonium chloride compounds; imidazoline quaternary compounds; mono-, di-, tri- and tetra-amidoamine quaternary compounds; mono-, di-, tri- and tetra-benzyl quaternary compounds; benzylalkyl quaternary compounds; cationic diquaternary compounds; cationic ethoxylated quaternary compounds; mono-, di-, tri- and tetra-alkyl class of quaternary ammonium compounds, and combinations thereof. 
     
     
         96 . The composition of  claim 86 , wherein the molar ratio of said leaching inhibitor:said colorant is between about 1:1 and about 4:1. 
     
     
         97 . The composition of  claim 86 , wherein the molar ratio of said leaching inhibitor:said colorant is selected from the group comprising or consisting of: between about 1:1 and about 4:1, between about 1:1 and about 3:1, between about 1:1 and about 2:1, between about 2:1 and about 4:1, between about 2:1 and about 3:1, and between about 3:1 and about 4:1. 
     
     
         98 . The composition of  claim 86 , wherein the molar ratio of said leaching inhibitor: said colorant is selected from the group comprising or consisting of: between about 1:1 and about 3:1, between about 1:1 and about 2.65:1, between about 1:1 and about 2.3:1, between about 1:1 and about 2:1, and between about 1:1 and about 1.75:1. 
     
     
         99 . The composition of  claim 92 , wherein said quaternary ammonium compound comprises a relatively greater molecular size. 
     
     
         100 . The composition of  claim 92 , wherein said quaternary ammonium compound and said colorant comprise a similar molecular weight. 
     
     
         101 . The composition of  claim 92 , wherein said quaternary ammonium compound has a molecular weight which is not greater than about 30 percent different from the molecular weight of said colorant. 
     
     
         102 . The composition of  claim 92 , wherein said quaternary ammonium compound and said colorant are present in about equimolar amounts. 
     
     
         103 . The composition of  claim 92 , wherein said quaternary ammonium compound comprises symmetry about at least one axis. 
     
     
         104 . The composition of  claim 92 , wherein said quaternary ammonium compound comprises symmetry about at least two axes. 
     
     
         105 . The composition of  claim 92 , wherein said quaternary ammonium compound comprises tetraoctyl ammonium bromide. 
     
     
         106 . The composition of  claim 2 , further comprising one or more acids. 
     
     
         107 . The composition of  claim 106 , wherein said acid is selected from the group comprising of consisting of: organic acid; citrate esters; glycolate esters; lactate esters; fatty acids; ether carboxylic acids; N-acyl sarcosinic acid surfactants; N-acyl glutamic acid surfactants; N-acyl ethylenediaminetriacidic acid surfactants; alkane sulfonic acids; alpha-olefin sulfonic acids; alpha-sulfonic acid fatty acid methyl esters; sulfate esters; fruit acids; salicylic acid; inorganic acids; and combinations thereof. 
     
     
         108 . The composition of  claim 2 , said printable ink formulation comprising a viscosity in the range of between about 25 cP and about 125 cP. 
     
     
         109 . The composition of  claim 2 , said printable ink formulation comprising a viscosity in the range of between about 30 cP and about 100 cP. 
     
     
         110 . The composition of  claim 55 , said printable ink formulation further comprising a viscosity modifier. 
     
     
         111 . The composition of  claim 110 , wherein said viscosity modifier comprises a viscosity increaser. 
     
     
         112 . The composition of  claim 111 , wherein said viscosity increaser is selected from the group comprising or consisting of: organoclays, paraffin waxes, micronized polytetrafluoroethylene, cellulosic rheology inhibitors, melamine/formaldeyde capsules, urea/formaldehyde capsules, silica, and combinations thereof. 
     
     
         113 . The composition of  claim 111 , wherein said viscosity increaser comprises silica. 
     
     
         114 . The composition of  claim 113 , wherein said viscosity increaser comprises fumed silica. 
     
     
         115 . The composition of  claim 113 , wherein said viscosity increaser comprises hydrophilic fumed silica. 
     
     
         116 . The composition of  claim 113 , wherein the resin:silica ratio is≥4:1. 
     
     
         117 . The composition of  claim 113 , wherein the resin:silica ratio is≤4:1. 
     
     
         118 . The composition of  claim 113 , wherein the resin:silica ratio is between about 1:1 and about 2:1. 
     
     
         119 . The composition of  claim 113 , wherein the resin:silica ratio is between about 2.5:1 and about 3.5:1. 
     
     
         120 . The composition of  claim 113 , wherein the resin:silica ratio is not less than about 4:1. 
     
     
         121 . The composition of  claim 113 , wherein the resin:silica ratio is about 1:1. 
     
     
         122 . The composition of  claim 2 , wherein the reaction time of said color change is not greater than about 2 minutes. 
     
     
         123 . The composition of  claim 2 , wherein the reaction time of said color change is between about 2 and about 4 minutes. 
     
     
         124 . The composition of  claim 2 , wherein the reaction time of said color change is not less than about 15 minutes. 
     
     
         125 . The composition of  claim 2 , wherein said color change is visually observable by a human. 
     
     
         126 . The composition of  claim 2 , wherein said color change is detectable by a human and/or a machine. 
     
     
         127 . A composition comprising:
 a colorant which undergoes a visible color change upon exposure to a wetness threshold, said colorant in an amount of about 0.3% to about 3% by weight of said composition;   a leaching inhibitor in an amount of about 0.3% to about 3% by weight of said composition; and   a solvent.   
     
     
         128 . The composition of  claim 127 , further comprising a resin in an amount of about 10% to about 30% by weight of said composition. 
     
     
         129 . The composition of  claim 128 , further comprising an acid in an amount of about 2% to about 8% by weight of said composition. 
     
     
         130 . The composition of  claim 129 , further comprising a viscosity modifier in an amount of about 3% to about 15% by weight of said composition. 
     
     
         131 . A method for visually determining whether a composition has been exposed to a wetness threshold, comprising:
 visually observing said composition comprising:
 a colorant which undergoes a visible color change upon exposure to said wetness threshold; and 
 a leaching inhibitor; 
 wherein, following application to a substrate, said colorant resists leaching from said substrate by being chemically bound to said leaching inhibitor; and 
   wherein visual detection of said color change indicates that said composition was exposed to said wetness threshold.   
     
     
         132 . The method of  claim 131 , wherein visual detection of the absence of said color change indicates that said composition was not exposed to said wetness threshold. 
     
     
         133 . The method of  claim 132 , said colorant formulated into a printable ink formulation. 
     
     
         134 . The method of  claim 133 , said printable ink formulation configured for printing on said substrate. 
     
     
         135 . The method of  claim 133 , said printable ink formulation in a liquid state at room temperature. 
     
     
         136 . The method of  claim 133 , said printable ink formulation in a liquid state at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         137 . The method of  claim 133 , said printable ink formulation consisting essentially of one or more components that are liquid at room temperature. 
     
     
         138 . The method of  claim 133 , said printable ink formulation consisting essentially of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         139 . The method of  claim 133 , said printable ink formulation consisting of one or more components that are liquid at room temperature. 
     
     
         140 . The method of  claim 133 , said printable ink formulation consisting of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         141 . The method of  claim 133 , said printable ink formulation consisting essentially of liquid at room temperature. 
     
     
         142 . The method of  claim 133 , said printable ink formulation consisting essentially of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         143 . The method of  claim 133 , said printable ink formulation consisting of liquid at room temperature. 
     
     
         144 . The method of  claim 133 , said printable ink formulation consisting of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         145 . The method of  claim 133 , said printable ink formulation formulated as a flexographic ink. 
     
     
         146 . The method of  claim 145 , said flexographic ink formulated for high-speed printing. 
     
     
         147 . The method of  claim 145 , said flexographic ink formulated for printing at a speed of at least about 1,000 feet/minute. 
     
     
         148 . The method of  claim 145 , said flexographic ink providing a dry film having a thickness of about 4-8 microns. 
     
     
         149 . The method of  claim 133 , said printable ink formulation formulated as a gravure ink. 
     
     
         150 . The method of  claim 149 , said gravure ink formulated for high-speed printing. 
     
     
         151 . The method of  claim 149 , said gravure ink formulated for printing at a speed of at least about 1,000 feet/minute. 
     
     
         152 . The method of  claim 149 , said gravure ink providing a dry film having a thickness of about 4-8 microns. 
     
     
         153 . The method of  claim 133 , said printable ink formulation formulated as a digital printing ink. 
     
     
         154 . The method of  claim 133 , said printable ink formulation formulated as an ink for printing via an inkjet printer. 
     
     
         155 . The method of  claim 133 , said printable ink formulation formulated as an ink for printing via a laser printer. 
     
     
         156 . The method of  claim 133 , said printable ink formulation further comprising a solvent. 
     
     
         157 . The method of  claim 156 , wherein said colorant and said leaching inhibitor are dispersed in said solvent. 
     
     
         158 . The method of  claim 156 , wherein said colorant and said leaching inhibitor are dissolved in said solvent. 
     
     
         159 . The method of  claim 156 , wherein said colorant and said leaching inhibitor are solubilized in said solvent. 
     
     
         160 . The method of  claim 156 , wherein said solvent comprises a volatile solvent. 
     
     
         161 . The method of  claim 160 , wherein at least a portion of said volatile solvent evaporates upon said printing. 
     
     
         162 . The method of  claim 156 , said solvent in a liquid state at room temperature. 
     
     
         163 . The method of  claim 156 , said solvent in a liquid state at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         164 . The method of  claim 156 , said solvent consisting essentially of one or more components that are liquid at room temperature. 
     
     
         165 . The method of  claim 156 , said solvent consisting essentially of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         166 . The method of  claim 156 , said solvent consisting of one or more components that are liquid at room temperature. 
     
     
         167 . The method of  claim 156 , said solvent consisting of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         168 . The method of  claim 156 , said solvent consisting essentially of liquid at room temperature. 
     
     
         169 . The method of  claim 156 , said solvent consisting essentially of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         170 . The method of  claim 156 , said solvent consisting of liquid at room temperature. 
     
     
         171 . The method of  claim 156 , said solvent consisting of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         172 . The method of  claim 156 , wherein said printable ink formulation does not include a solvent which is solid or meltable at room temperature. 
     
     
         173 . The method of  claim 156 , wherein said printable ink formulation does not include a solvent which is solid or meltable at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         174 . The method of  claim 156 , wherein said printable ink formulation is devoid of a solvent which is solid or meltable at room temperature. 
     
     
         175 . The method of  claim 156 , wherein said printable ink formulation is devoid of a solvent which is solid or meltable at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         176 . The method of  claim 156 , wherein said solvent comprises one or more alcohols. 
     
     
         177 . The method of  claim 156 , wherein said solvent consists essentially of one or more alcohols. 
     
     
         178 . The method of  claim 156 , wherein said solvent consists of one or more alcohols. 
     
     
         179 . The method of  claim 156 , wherein said solvent comprises one or more acetates. 
     
     
         180 . The method of  claim 156 , wherein said solvent consists essentially of one or more acetates. 
     
     
         181 . The method of  claim 156 , wherein said solvent consists of one or more acetates. 
     
     
         182 . The method of  claim 156 , wherein said solvent comprises a mixture of at least two said solvents. 
     
     
         183 . The method of  claim 156 , wherein said solvent comprises a mixture of at least two alcohols. 
     
     
         184 . The method of  claim 156 , wherein said solvent comprises a mixture of at least one alcohol and at least one acetate. 
     
     
         185 . The method of  claim 156 , wherein said solvent comprises or consists essentially of or consists of one or more organic solvents. 
     
     
         186 . The method of  claim 156 , said printable ink formulation further comprising a resin. 
     
     
         187 . The method of  claim 186 , wherein said colorant, said leaching inhibitor, and said resin are dispersed in said solvent. 
     
     
         188 . The method of  claim 186 , wherein said colorant, said leaching inhibitor, and said resin are dissolved in said solvent. 
     
     
         189 . The method of  claim 186 , wherein said colorant, said leaching inhibitor, and said resin are solubilized in said solvent. 
     
     
         190 . The method of  claim 186 , wherein said resin functions as a binder to facilitate adhesion of said colorant to said substrate. 
     
     
         191 . The method of  claim 186 , wherein said resin comprises a polyvinyl butyral. 
     
     
         192 . The method of  claim 186 , wherein said resin comprises a polyketone resin. 
     
     
         193 . The method of  claim 186 , wherein said resin comprises a polyamide resin. 
     
     
         194 . The method of  claim 186 , wherein said resin comprises a phenolic resin. 
     
     
         195 . The method of  claim 186 , wherein said resin comprises a fumaric resin ester. 
     
     
         196 . The method of  claim 186 , wherein said resin comprises a polyurethane resin. 
     
     
         197 . The method of  claim 186 , wherein said resin has a relatively high solubility in organic solvents. 
     
     
         198 . The method of  claim 133 , wherein said visible color change is irreversible. 
     
     
         199 . The method of  claim 133 , wherein said colorant comprises a first color state associated with a first state of said composition. 
     
     
         200 . The method of  claim 199 , wherein said colorant comprises a second color state associated with a second state of said composition. 
     
     
         201 . The method of  claim 200 , wherein said second color state is visibly different from said first color state. 
     
     
         202 . The method of  claim 201 , said printable ink formulation configured as a urine indicator. 
     
     
         203 . The method of  claim 202 , wherein said colorant comprises a pH-sensitive colorant. 
     
     
         204 . The method of  claim 203 , wherein said pH-sensitive colorant undergoes said visible color change upon exposure to a pH threshold. 
     
     
         205 . The method of  claim 204 , said pH threshold associated with a pH of about 5.5 to about 8.0. 
     
     
         206 . The method of  claim 204 , said pH threshold associated with urine. 
     
     
         207 . The method of  claim 205 , said second state of said composition associated with said pH threshold. 
     
     
         208 . The method of  claim 206 , said second state of said composition associated with said pH threshold. 
     
     
         209 . The method of  claim 204 , said colorant neutral in charge at a pH below that of urine. 
     
     
         210 . The method of  claim 209 , said colorant anionic after contact with said urine. 
     
     
         211 . The method of  claim 204 , said colorant a sulfonephthalein. 
     
     
         212 . The method of  claim 204 , said colorant comprising bromophenol blue. 
     
     
         213 . The method of  claim 204 , said colorant consisting essentially of bromophenol blue. 
     
     
         214 . The method of  claim 204 , said colorant consisting of bromophenol blue. 
     
     
         215 . The method of  claim 204 , wherein said colorant comprises a mixture of at least two said colorants. 
     
     
         216 . The method of  claim 133 , said printable ink formulation comprising said leaching inhibitor. 
     
     
         217 . The method of  claim 216 , wherein said leaching inhibitor functions to immobilize said colorant relative to said substrate when said colorant is chemically bound to said leaching inhibitor. 
     
     
         218 . The method of  claim 217 , wherein said leaching inhibitor is cationic. 
     
     
         219 . The method of  claim 218 , wherein said cationic leaching inhibitor associates with an anionic form of said colorant to form a complex thereof. 
     
     
         220 . The method of  claim 219 , wherein formation of said complex neutralizes the charge of both said anionic form of said colorant and said leaching inhibitor. 
     
     
         221 . The method of  claim 220 , wherein said complex is substantially insoluble or insoluble in hydrophilic media. 
     
     
         222 . The method of  claim 220 , wherein said complex is substantially insoluble or insoluble in urine. 
     
     
         223 . The method of  claim 217 , wherein said leaching inhibitor comprises a quaternary ammonium compound. 
     
     
         224 . The method of  claim 217 , wherein said leaching inhibitor consists essentially of a quaternary ammonium compound. 
     
     
         225 . The method of  claim 217 , wherein said leaching inhibitor consists of a quaternary ammonium compound. 
     
     
         226 . The method of  claim 217 , wherein said leaching inhibitor is selected from the group comprising or consisting of: dialkyl dimethyl ammonium quaternary compounds; alkyl trimethyl ammonium chloride compounds; imidazoline quaternary compounds; mono-, di-, tri- and tetra-amidoamine quaternary compounds; mono-, di-, tri- and tetra-benzyl quaternary compounds; benzylalkyl quaternary compounds; cationic diquaternary compounds; cationic ethoxylated quaternary compounds; mono-, di-, tri- and tetra-alkyl class of quaternary ammonium compounds, and combinations thereof. 
     
     
         227 . The method of  claim 217 , wherein the molar ratio of said leaching inhibitor:said colorant is between about 1:1 and about 4:1. 
     
     
         228 . The method of  claim 217 , wherein the molar ratio of said leaching inhibitor:said colorant is selected from the group comprising or consisting of: between about 1:1 and about 4:1, between about 1:1 and about 3:1, between about 1:1 and about 2:1, between about 2:1 and about 4:1, between about 2:1 and about 3:1, and between about 3:1 and about 4:1. 
     
     
         229 . The method of  claim 217 , wherein the molar ratio of said leaching inhibitor:said colorant is selected from the group comprising or consisting of: between about 1:1 and about 3:1, between about 1:1 and about 2.65:1, between about 1:1 and about 2.3:1, between about 1:1 and about 2:1, and between about 1:1 and about 1.75:1. 
     
     
         230 . The method of  claim 223 , wherein said quaternary ammonium compound comprises a relatively greater molecular size. 
     
     
         231 . The method of  claim 223 , wherein said quaternary ammonium compound and said colorant comprise a similar molecular weight. 
     
     
         232 . The method of  claim 223 , wherein said quaternary ammonium compound has a molecular weight which is not greater than about 30 percent different from the molecular weight of said colorant. 
     
     
         233 . The method of  claim 223 , wherein said quaternary ammonium compound and said colorant are present in about equimolar amounts. 
     
     
         234 . The method of  claim 223 , wherein said quaternary ammonium compound comprises symmetry about at least one axis. 
     
     
         235 . The method of  claim 223 , wherein said quaternary ammonium compound comprises symmetry about at least two axes. 
     
     
         236 . The method of  claim 223 , wherein said quaternary ammonium compound comprises tetraoctyl ammonium bromide. 
     
     
         237 . The method of  claim 133 , further comprising one or more acids. 
     
     
         238 . The method of  claim 237 , wherein said acid is selected from the group comprising of consisting of: organic acid; citrate esters; glycolate esters; lactate esters; fatty acids; ether carboxylic acids; N-acyl sarcosinic acid surfactants; N-acyl glutamic acid surfactants; N-acyl ethylenediaminetriacidic acid surfactants; alkane sulfonic acids; alpha-olefin sulfonic acids; alpha-sulfonic acid fatty acid methyl esters; sulfate esters; fruit acids; salicylic acid; inorganic acids; and combinations thereof. 
     
     
         239 . The method of  claim 133 , said printable ink formulation comprising a viscosity in the range of between about 25 cP and about 125 cP. 
     
     
         240 . The method of  claim 133 , said printable ink formulation comprising a viscosity in the range of between about 30 cP and about 100 cP. 
     
     
         241 . The method of  claim 186 , said printable ink formulation further comprising a viscosity modifier. 
     
     
         242 . The method of  claim 241 , wherein said viscosity modifier comprises a viscosity increaser. 
     
     
         243 . The method of  claim 242 , wherein said viscosity increaser is selected from the group comprising or consisting of: organoclays, paraffin waxes, micronized polytetrafluoroethylene, cellulosic rheology inhibitors, melamine/formal deyde capsules, urea/formaldehyde capsules, silica, and combinations thereof. 
     
     
         244 . The method of  claim 242 , wherein said viscosity increaser comprises silica. 
     
     
         245 . The method of  claim 244 , wherein said viscosity increaser comprises fumed silica. 
     
     
         246 . The method of  claim 244 , wherein said viscosity increaser comprises hydrophilic fumed silica. 
     
     
         247 . The method of  claim 244 , wherein the resin:silica ratio is≥4:1. 
     
     
         248 . The method of  claim 244 , wherein the resin:silica ratio is≤4:1. 
     
     
         249 . The method of  claim 244 , wherein the resin: silica ratio is between about 1:1 and about 2:1. 
     
     
         250 . The method of  claim 244 , wherein the resin:silica ratio is between about 2.5:1 and about 3.5:1. 
     
     
         251 . The method of  claim 244 , wherein the resin:silica ratio is not less than about 4:1. 
     
     
         252 . The method of  claim 244 , wherein the resin:silica ratio is about 1:1. 
     
     
         253 . The method of  claim 133 , wherein the reaction time of said color change is not greater than about 2 minutes. 
     
     
         254 . The method of  claim 133 , wherein the reaction time of said color change is between about 2 and about 4 minutes. 
     
     
         255 . The method of  claim 133 , wherein the reaction time of said color change is not less than about 15 minutes. 
     
     
         256 . The method of  claim 133 , wherein said color change is visually observable by a human. 
     
     
         257 . The method of  claim 133 , wherein said color change is detectable by a human and/or a machine. 
     
     
         258 . A method for visually determining whether a composition has been exposed to a wetness threshold, comprising:
 visually observing said composition comprising:
 a colorant which undergoes a visible color change upon exposure to a wetness threshold, said colorant in an amount of about 0.3% to about 3% by weight of said composition; 
 a leaching inhibitor in an amount of about 0.3% to about 3% by weight of said composition; and 
 a solvent; and 
   wherein visual detection of said color change indicates that said composition was exposed to said wetness threshold.   
     
     
         259 . The method of  claim 258 , wherein visual detection of the absence of said color change indicates that said composition was not exposed to said wetness threshold. 
     
     
         260 . The method of  claim 259 , further comprising a resin in an amount of about 10% to about 30% by weight of said composition. 
     
     
         261 . The method of  claim 260 , further comprising an acid in an amount of about 2% to about 8% by weight of said composition. 
     
     
         262 . The method of  claim 261 , further comprising a viscosity modifier in an amount of about 3% to about 15% by weight of said composition. 
     
     
         263 . A method of making a composition, comprising:
 combining:
 a colorant which undergoes a visible color change upon exposure to a wetness threshold; and 
 a leaching inhibitor; 
   wherein, following application to a substrate, said colorant resists leaching from said substrate by being chemically bound to said leaching inhibitor.   
     
     
         264 . The method of  claim 263 , further comprising applying said colorant to said substrate. 
     
     
         265 . The method of  claim 263 , further comprising formulating said colorant into a printable ink formulation. 
     
     
         266 . The method of  claim 265 , further comprising printing said printable ink formulation on said substrate. 
     
     
         267 . The method of  claim 265 , said printable ink formulation in a liquid state at room temperature. 
     
     
         268 . The method of  claim 265 , said printable ink formulation in a liquid state at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         269 . The method of  claim 265 , said printable ink formulation consisting essentially of one or more components that are liquid at room temperature. 
     
     
         270 . The method of  claim 265 , said printable ink formulation consisting essentially of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         271 . The method of  claim 265 , said printable ink formulation consisting of one or more components that are liquid at room temperature. 
     
     
         272 . The method of  claim 265 , said printable ink formulation consisting of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         273 . The method of  claim 265 , said printable ink formulation consisting essentially of liquid at room temperature. 
     
     
         274 . The method of  claim 265 , said printable ink formulation consisting essentially of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         275 . The method of  claim 265 , said printable ink formulation consisting of liquid at room temperature. 
     
     
         276 . The method of  claim 265 , said printable ink formulation consisting of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         277 . The method of  claim 265 , said printable ink formulation formulated as a flexographic ink. 
     
     
         278 . The method of  claim 277 , said flexographic ink formulated for high-speed printing. 
     
     
         279 . The method of  claim 277 , said flexographic ink formulated for printing at a speed of at least about 1,000 feet/minute. 
     
     
         280 . The method of  claim 277 , said flexographic ink providing a dry film having a thickness of about 4-8 microns. 
     
     
         281 . The method of  claim 265 , said printable ink formulation formulated as a gravure ink. 
     
     
         282 . The method of  claim 281 , said gravure ink formulated for high-speed printing. 
     
     
         283 . The method of  claim 281 , said gravure ink formulated for printing at a speed of at least about 1,000 feet/minute. 
     
     
         284 . The method of  claim 281 , said gravure ink providing a dry film having a thickness of about 4-8 microns. 
     
     
         285 . The method of  claim 265 , said printable ink formulation formulated as a digital printing ink. 
     
     
         286 . The method of  claim 265 , said printable ink formulation formulated as an ink for printing via an inkjet printer. 
     
     
         287 . The method of  claim 265 , said printable ink formulation formulated as an ink for printing via a laser printer. 
     
     
         288 . The method of  claim 265 , said printable ink formulation further comprising a solvent. 
     
     
         289 . The method of  claim 288 , wherein said colorant and said leaching inhibitor are dispersed in said solvent. 
     
     
         290 . The method of  claim 288 , wherein said colorant and said leaching inhibitor are dissolved in said solvent. 
     
     
         291 . The method of  claim 288 , wherein said colorant and said leaching inhibitor are solubilized in said solvent. 
     
     
         292 . The method of  claim 288 , wherein said solvent comprises a volatile solvent. 
     
     
         293 . The method of  claim 292 , wherein at least a portion of said volatile solvent evaporates upon said printing. 
     
     
         294 . The method of  claim 288 , said solvent in a liquid state at room temperature. 
     
     
         295 . The method of  claim 288 , said solvent in a liquid state at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         296 . The method of  claim 288 , said solvent consisting essentially of one or more components that are liquid at room temperature. 
     
     
         297 . The method of  claim 288 , said solvent consisting essentially of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         298 . The method of  claim 288 , said solvent consisting of one or more components that are liquid at room temperature. 
     
     
         299 . The method of  claim 288 , said solvent consisting of one or more components that are liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         300 . The method of  claim 288 , said solvent consisting essentially of liquid at room temperature. 
     
     
         301 . The method of  claim 288 , said solvent consisting essentially of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         302 . The method of  claim 288 , said solvent consisting of liquid at room temperature. 
     
     
         303 . The method of  claim 288 , said solvent consisting of liquid at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         304 . The method of  claim 288 , wherein said printable ink formulation does not include a solvent which is solid or meltable at room temperature. 
     
     
         305 . The method of  claim 288 , wherein said printable ink formulation does not include a solvent which is solid or meltable at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         306 . The method of  claim 288 , wherein said printable ink formulation is devoid of a solvent which is solid or meltable at room temperature. 
     
     
         307 . The method of  claim 288 , wherein said printable ink formulation is devoid of a solvent which is solid or meltable at a temperature in a range of between about 20° C. and about 25° C. 
     
     
         308 . The method of  claim 288 , wherein said solvent comprises one or more alcohols. 
     
     
         309 . The method of  claim 288 , wherein said solvent consists essentially of one or more alcohols. 
     
     
         310 . The method of  claim 288 , wherein said solvent consists of one or more alcohols. 
     
     
         311 . The method of  claim 288 , wherein said solvent comprises one or more acetates. 
     
     
         312 . The method of  claim 288 , wherein said solvent consists essentially of one or more acetates. 
     
     
         313 . The method of  claim 288 , wherein said solvent consists of one or more acetates. 
     
     
         314 . The method of  claim 288 , wherein said solvent comprises a mixture of at least two said solvents. 
     
     
         315 . The method of  claim 288 , wherein said solvent comprises a mixture of at least two alcohols. 
     
     
         316 . The method of  claim 288 , wherein said solvent comprises a mixture of at least one alcohol and at least one acetate. 
     
     
         317 . The method of  claim 288 , wherein said solvent comprises or consists essentially of or consists of one or more organic solvents. 
     
     
         318 . The method of  claim 288 , said printable ink formulation further comprising a resin. 
     
     
         319 . The method of  claim 318 , wherein said colorant, said leaching inhibitor, and said resin are dispersed in said solvent. 
     
     
         320 . The method of  claim 318 , wherein said colorant, said leaching inhibitor, and said resin are dissolved in said solvent. 
     
     
         321 . The method of  claim 318 , wherein said colorant, said leaching inhibitor, and said resin are solubilized in said solvent. 
     
     
         322 . The method of  claim 318 , wherein said resin functions as a binder to facilitate adhesion of said colorant to said substrate. 
     
     
         323 . The method of  claim 318 , wherein said resin comprises a polyvinyl butyral. 
     
     
         324 . The method of  claim 318 , wherein said resin comprises a polyketone resin. 
     
     
         325 . The method of  claim 318 , wherein said resin comprises a polyamide resin. 
     
     
         326 . The method of  claim 318 , wherein said resin comprises a phenolic resin. 
     
     
         327 . The method of  claim 318 , wherein said resin comprises a fumaric resin ester. 
     
     
         328 . The method of  claim 318 , wherein said resin comprises a polyurethane resin. 
     
     
         329 . The method of  claim 318 , wherein said resin has a relatively high solubility in organic solvents. 
     
     
         330 . The method of  claim 265 , wherein said visible color change is irreversible. 
     
     
         331 . The method of  claim 265 , wherein said colorant comprises a first color state associated with a first state of said composition. 
     
     
         332 . The method of  claim 331 , wherein said colorant comprises a second color state associated with a second state of said composition. 
     
     
         333 . The method of  claim 332 , wherein said second color state is visibly different from said first color state. 
     
     
         334 . The method of  claim 333 , said printable ink formulation configured as a urine indicator. 
     
     
         335 . The method of  claim 334 , wherein said colorant comprises a pH-sensitive colorant. 
     
     
         336 . The method of  claim 335 , wherein said pH-sensitive colorant undergoes said visible color change upon exposure to a pH threshold. 
     
     
         337 . The method of  claim 336 , said pH threshold associated with a pH of about 5.5 to about 8.0. 
     
     
         338 . The method of  claim 336 , said pH threshold associated with urine. 
     
     
         339 . The method of  claim 337 , said second state of said composition associated with said pH threshold. 
     
     
         340 . The method of  claim 338 , said second state of said composition associated with said pH threshold. 
     
     
         341 . The method of  claim 336 , said colorant neutral in charge at a pH below that of urine. 
     
     
         342 . The method of  claim 341 , said colorant anionic after contact with said urine. 
     
     
         343 . The method of  claim 336 , said colorant a sulfonephthalein. 
     
     
         344 . The method of  claim 336 , said colorant comprising bromophenol blue. 
     
     
         345 . The method of  claim 336 , said colorant consisting essentially of bromophenol blue. 
     
     
         346 . The method of  claim 336 , said colorant consisting of bromophenol blue. 
     
     
         347 . The method of  claim 336 , wherein said colorant comprises a mixture of at least two said colorants. 
     
     
         348 . The method of  claim 265 , said printable ink formulation comprising said leaching inhibitor. 
     
     
         349 . The method of  claim 348 , wherein said leaching inhibitor functions to immobilize said colorant relative to said substrate when said colorant is chemically bound to said leaching inhibitor. 
     
     
         350 . The method of  claim 349 , wherein said leaching inhibitor is cationic. 
     
     
         351 . The method of  claim 350 , wherein said cationic leaching inhibitor associates with an anionic form of said colorant to form a complex thereof. 
     
     
         352 . The method of  claim 351 , wherein formation of said complex neutralizes the charge of both said anionic form of said colorant and said leaching inhibitor. 
     
     
         353 . The method of  claim 352 , wherein said complex is substantially insoluble or insoluble in hydrophilic media. 
     
     
         354 . The method of  claim 352 , wherein said complex is substantially insoluble or insoluble in urine. 
     
     
         355 . The method of  claim 349 , wherein said leaching inhibitor comprises a quaternary ammonium compound. 
     
     
         356 . The method of  claim 349 , wherein said leaching inhibitor consists essentially of a quaternary ammonium compound. 
     
     
         357 . The method of  claim 349 , wherein said leaching inhibitor consists of a quaternary ammonium compound. 
     
     
         358 . The method of  claim 349 , wherein said leaching inhibitor is selected from the group comprising or consisting of: dialkyl dimethyl ammonium quaternary compounds; alkyl trimethyl ammonium chloride compounds; imidazoline quaternary compounds; mono-, di-, tri- and tetra-amidoamine quaternary compounds; mono-, di-, tri- and tetra-benzyl quaternary compounds; benzylalkyl quaternary compounds; cationic diquaternary compounds; cationic ethoxylated quaternary compounds; mono-, di-, tri- and tetra-alkyl class of quaternary ammonium compounds, and combinations thereof. 
     
     
         359 . The method of  claim 349 , wherein the molar ratio of said leaching inhibitor:said colorant is between about 1:1 and about 4:1. 
     
     
         360 . The method of  claim 349 , wherein the molar ratio of said leaching inhibitor:said colorant is selected from the group comprising or consisting of: between about 1:1 and about 4:1, between about 1:1 and about 3:1, between about 1:1 and about 2:1, between about 2:1 and about 4:1, between about 2:1 and about 3:1, and between about 3:1 and about 4:1. 
     
     
         361 . The method of  claim 349 , wherein the molar ratio of said leaching inhibitor:said colorant is selected from the group comprising or consisting of: between about 1:1 and about 3:1, between about 1:1 and about 2.65:1, between about 1:1 and about 2.3:1, between about 1:1 and about 2:1, and between about 1:1 and about 1.75:1. 
     
     
         362 . The method of  claim 355 , wherein said quaternary ammonium compound comprises a relatively greater molecular size. 
     
     
         363 . The method of  claim 355 , wherein said quaternary ammonium compound and said colorant comprise a similar molecular weight. 
     
     
         364 . The method of  claim 355 , wherein said quaternary ammonium compound has a molecular weight which is not greater than about 30 percent different from the molecular weight of said colorant. 
     
     
         365 . The method of  claim 355 , wherein said quaternary ammonium compound and said colorant are present in about equimolar amounts. 
     
     
         366 . The method of  claim 355 , wherein said quaternary ammonium compound comprises symmetry about at least one axis. 
     
     
         367 . The method of  claim 355 , wherein said quaternary ammonium compound comprises symmetry about at least two axes. 
     
     
         368 . The method of  claim 355 , wherein said quaternary ammonium compound comprises tetraoctyl ammonium bromide. 
     
     
         369 . The method of  claim 265 , further comprising one or more acids. 
     
     
         370 . The method of  claim 369 , wherein said acid is selected from the group comprising of consisting of: organic acid; citrate esters; glycolate esters; lactate esters; fatty acids; ether carboxylic acids; N-acyl sarcosinic acid surfactants; N-acyl glutamic acid surfactants; N-acyl ethylenediaminetriacidic acid surfactants; alkane sulfonic acids; alpha-olefin sulfonic acids; alpha-sulfonic acid fatty acid methyl esters; sulfate esters; fruit acids; salicylic acid; inorganic acids; and combinations thereof. 
     
     
         371 . The method of  claim 265 , said printable ink formulation comprising a viscosity in the range of between about 25 cP and about 125 cP. 
     
     
         372 . The method of  claim 265 , said printable ink formulation comprising a viscosity in the range of between about 30 cP and about 100 cP. 
     
     
         373 . The method of  claim 318 , said printable ink formulation further comprising a viscosity modifier. 
     
     
         374 . The method of  claim 373 , wherein said viscosity modifier comprises a viscosity increaser. 
     
     
         375 . The method of  claim 374 , wherein said viscosity increaser is selected from the group comprising or consisting of: organoclays, paraffin waxes, micronized polytetrafluoroethylene, cellulosic rheology inhibitors, melamine/formaldeyde capsules, urea/formaldehyde capsules, silica, and combinations thereof. 
     
     
         376 . The method of  claim 374 , wherein said viscosity increaser comprises silica. 
     
     
         377 . The method of  claim 376 , wherein said viscosity increaser comprises fumed silica. 
     
     
         378 . The method of  claim 376 , wherein said viscosity increaser comprises hydrophilic fumed silica. 
     
     
         379 . The method of  claim 376 , wherein the resin:silica ratio is≥4:1. 
     
     
         380 . The method of  claim 376 , wherein the resin:silica ratio is≤4:1. 
     
     
         381 . The method of  claim 376 , wherein the resin:silica ratio is between about 1:1 and about 2:1. 
     
     
         382 . The method of  claim 376 , wherein the resin:silica ratio is between about 2.5:1 and about 3.5:1. 
     
     
         383 . The method of  claim 376 , wherein the resin:silica ratio is not less than about 4:1. 
     
     
         384 . The method of  claim 376 , wherein the resin:silica ratio is about 1:1. 
     
     
         385 . The method of  claim 265 , wherein the reaction time of said color change is not greater than about 2 minutes. 
     
     
         386 . The method of  claim 265 , wherein the reaction time of said color change is between about 2 and about 4 minutes. 
     
     
         387 . The method of  claim 265 , wherein the reaction time of said color change is not less than about 15 minutes. 
     
     
         388 . The method of  claim 265 , wherein said color change is visually observable by a human. 
     
     
         389 . The method of  claim 265 , wherein said color change is detectable by a human and/or a machine. 
     
     
         390 . A composition comprising:
 a colorant which undergoes a visible color change upon exposure to a wetness threshold, said colorant in an amount of about 0.3% to about 3% by weight of said composition;   a leaching inhibitor in an amount of about 0.3% to about 3% by weight of said composition; and   a solvent.   
     
     
         391 . The method of  claim 390 , further comprising a resin in an amount of about 10% to about 30% by weight of said composition. 
     
     
         392 . The method of  claim 391 , further comprising an acid in an amount of about 2% to about 8% by weight of said composition. 
     
     
         393 . The method of  claim 392 , further comprising a viscosity modifier in an amount of about 3% to about 15% by weight of said composition.