subject: Conventional Printing Processes And Dye Fabric Classification And Application - Fabric Printing - [print this page] First, the main routine Printing Process description
1, directly Printing Direct printing is the printing paste directly printed on the fabric to form the flower pattern of the printing method. It has a simple process, low cost features, it is widely used in a variety of fabric printing.
2, discharge printing discharge printing is to dye the fabric first, then the processing method for printing. Printing paste can be destroyed to contain the chemical dye (called discharge agent). The post-processing, printing to color paste Department is destroyed, and then washed to remove pulp and destruction of the dye, printing office white flower, called the pull white; in the presence of the colorant in the discharge agent such as adding damage will not be pulling dye agent, so when printing in color pattern known as the color pull parts. The paste contains only discharge agent, used to pull on that white pulp; with discharge agent and the paste containing the coloring dyes, traditionally called color pull pulp. Discharge printing fabric with full access to color, pattern and detailed, colorful effect.
3, resist printing resist printing is printed on the fabric before and after dyeing printing method. Printing paste contains can destroy or prevent the color dye to the chemical substances (discharge agent), Printing Department, not to dye fabric dyeing, fabric washing, printing office white pattern, known as Anti-white printing; if While the anti-white, printing paste also contains anti-agent does not play a role with the dye, color dye in the ground at the same time, the dye printing paste in between, then printing colored patterns obtained, it would is the color resist printing. Resist printing patterns obtained from fine generally is less than discharge printing, resist printing, but applicable to the land than the former and more dye species.
4, anti-India stamp (or anti-pulp printing) Resist Printing is Printing machine Printed in color on the cover conduct by the anti-dyed or discharge printing method.
2, the fabric's dye application profile
1, the current principal use of the dye printing and dyeing industry overview:
(1) Acid Dyes Our acid dyes are dye molecules that contain sulfonic, carboxyl and hydroxyl groups such as soluble dyes, but not the 1:2 metal complex dyes. Acid dye is soluble in water, and generally dyed in acid bath. In accordance with the dye bath in dyeing properties and acid strength, acid dyes can be divided into strong acid dyes (the general acid dyes) and weak acid dye.
Acid dye production in China early success of the 1957 trial of acid anthraquinone dye structure. Regular production of the current has reached more than 40 kinds of acid dyes, acid dyes which usually more than 20 species, 20 species of weak acid dye.
(2) neutral dye Mainly refers to elements of 1:2 metal complex dye or some copper alpha. These dyes are generally neutral or weak acid bath dyeing, named neutral dyes.
1:2 metal complex dyes mainly refers to the two azo dyes and a chromium or cobalt complex formed. Complex of two azo dyes can be the same (symmetric), it can be different (asymmetric type). In the azo-based complex for the adjacent bit of hydroxy, carboxyl or amino, sulfonyl dyes also contain amino, methylsulfonyl and other water-soluble groups, which can be dissolved in water. Currently, some neutral dyes also contain sulfonic or carboxylic acid, to increase the dye solubility in water.
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