Discharge

Discharge Printing | Textiles Print Paste and Color

The method of printing so far described is simply adapted a multi colored pattern on a white fabric. This textiles print also is used for producing similar patterns on slightly tinted fabric, but certainly not on deeply colored fabric. For then the ground color would interfere with the colored pattern printed upon it. As everyone knows, many of the most attractive fabrics are those which have colored patterns on a ground color as the original all over color of the fabric to be printed is termed.

 

How can these discharge print patterned be obtained?

Before answering this question it will be useful to consider another kind of printing pattern that is a white pattern on a ground color. To produce this th following method is used. Firstly the faric is dyed all over with a ground shade, say brown. Then it is printed, not with a color paste but with a paste containing chemicals capable of bleaching the brown color to a white. Such a printing paste is called a discharge paste, and the method of printing is known as discharge paste. This does not usually act in the cold but only acts when the fabric is dried and passed for a few minutes through a chamber heated by means of steam which also keeps the air moist. The discharge paste then destroys the brown ground shade to give a white pattern in the printed parts.
This discharge method can be collaborated through a chamber heated by means of steam which also keeps the air moist. The discharge paste then destroys the brown ground shade to giv a whit epattrn in the printed parts.
The discharge printing method can be elaborated still further. There wll be some dyes which are not destroyed by the chemicals in the discharge paste, so one or more of these can be incorporated in the discharge paste. After the textile printing and subsequent steaming on a colored pattern, instead of a white pattern will then be produced on the brown ground.
Obviously these white and colored discharge processes lend themselves to the production of a wide range of patterns on colored grounds.