Combined dyeing process

Abstract

The present invention provides a combined dyeing method that includes: a scouring process (S 12 ) of scouring a dyeing target material which is chemically dyed with a chemical dye to remove impurities remaining in the dyeing target material; an eco-friendly dyeing process (S 13 ) of dyeing the dyeing target material with an natural dye; a mordanting process (S 14 ) of adding a mordant to the dyeing target material to fix the natural dye to the dyeing target material; a cleaning process (S 15 ) of removing the mordant remaining in the dyeing target material; and a drying process (S 16 ) of drying the dyeing target material.

What is claimed is: 
     
         1 . A combined dyeing method comprising:
 a scouring process (S 12 ) of scouring a dyeing target material which is chemically dyed with a chemical dye to remove impurities remaining in the dyeing target material;   an eco-friendly dyeing process (S 13 ) of dyeing the dyeing target material with a natural dye;   a mordanting process (S 14 ) of adding a mordant to the dyeing target material to fix the natural dye to the dyeing target material;   a cleaning process (S 15 ) of removing the mordant remaining in the dyeing target material; and   a drying process (S 16 ) of drying the dyeing target material.   
     
     
         2 . The combined dyeing method of  claim 1 , wherein the mordant added in the mordanting process (S 14 ) is one or more of quicklime, slaked lime, aluminum acetate, and aluminum chloride. 
     
     
         3 . A combined dyeing method comprising:
 a scouring process (S 22 ) of scouring a dyeing target material which is chemically dyed with an indigo-added chemical dye to remove impurities remaining in the dyeing target material;   a reduction dyeing process (S 23 ) of dyeing the dyeing target material by adding a dyeing solution to the dyeing target material;   an oxidizing process (S 24 ) of oxidizing the dyeing target material by exposing the dyeing target material to the air;   a neutralizing process (S 25 ) of neutralizing the dyeing target material by adding an acetate aqueous solution to the dyeing target material;   a cleaning process (S 26 ) of cleaning the dyeing target material; and   a drying process (S 27 ) of drying the dyeing target material.   
     
     
         4 . The combined dyeing method of  claim 3 , wherein the dyeing solution is prepared by mixing 1 L of water, 1 to 10 g of natural indigo powder, 5 to 10 g of hydrosulfite, and 2 to 5 g of sodium hydroxide. 
     
     
         5 . The combined dyeing method of  claim 4 , wherein the reduction dyeing process (S 23 ) is carried out for 20 to 40 minutes while the dyeing solution is at a temperature ranging from 20 to 30° C.