Ink set, fluid applying apparatus, fluid applying method, and printed product

Abstract

An ink set contains: a pre-treatment fluid containing an organic acid and an amine compound; an aqueous pigment ink containing water; a pigment; and an organic solvent, and a post-treatment fluid containing a cationic resin particle.

1 . An ink set comprising:
 a pre-treatment fluid comprising:
 an organic acid; and 
 an amine compound; 
 an aqueous pigment ink comprising: 
 water; 
 a pigment; and 
 an organic solvent, and 
 a post-treatment fluid comprising a cationic resin particle. 
   
     
     
         2 . The ink set according to  claim 1 , wherein the organic acid comprises at least one of lactic acid, citric acid, or acetic acid. 
     
     
         3 . The ink set according to  claim 1 , wherein the post-treatment fluid has a viscosity of 8.0 to 11.0 cP at 25 degrees Celsius. 
     
     
         4 . The ink set according to  claim 1 ,
 wherein the post-treatment fluid contains a solid content ranging from 5.0 to 20.0 percent by mass.   
     
     
         5 . A fluid applying apparatus comprising:
 the ink set of  claim 1 ;   a pre-treatment fluid applying device to apply the pre-treatment fluid to a substrate;   an ink applying device to apply the aqueous pigment ink to the substrate; and   a post-treatment fluid applying device to apply the post-treatment fluid to the substrate.   
     
     
         6 . The apparatus according to  claim 5 ,
 wherein the ink applying device discharges the aqueous pigment ink and the post-treatment fluid applying device discharges the post-treatment fluid.   
     
     
         7 . The apparatus according to  claim 6 , further comprising:
 one or more nozzle surface cleaning device each comprising a wiping member,   wherein the ink applying device includes a nozzle surface with nozzles that discharge the aqueous pigment ink,   wherein the post-treatment fluid applying device includes a nozzle surface with nozzles that discharge the post-treatment fluid,   wherein the one or more nozzle surface cleaning devices clean at least one of the nozzle surface of the ink applying device or the nozzle surface of the post-treatment fluid applying device, the wiping member wipes off fluid on at least one of the nozzle surface of the ink applying device or the nozzle surface of the post-treatment fluid applying device.   
     
     
         8 . A fluid applying method using the ink set of  claim 1 , the method comprising:
 applying the pre-treatment fluid to a substrate;   applying the aqueous pigment ink to the substrate; and   applying the post-treatment fluid to the substrate.   
     
     
         9 . The method according to  claim 8 ,
 wherein the method includes no heat drying between the applying the aqueous pigment ink and the applying the post-treatment fluid.   
     
     
         10 . The method according to  claim 8 ,
 wherein the applying the post-treatment fluid includes adjusting an applied amount of the post-treatment fluid.   
     
     
         11 . The method according to  claim 8 , further comprising:
 pressing a region where the pre-treatment fluid has been applied after the applying the pre-treatment fluid and before the applying the aqueous pigment ink.   
     
     
         12 . A printed product produced with the ink set of  claim 1 , comprising:
 a substrate;   a print layer on the substrate, the print layer comprising the organic acid, the amine compound, and the pigment; and   a layer on the print layer, the layer containing the cationic resin particle on the print layer.