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Views: 20 Author: Site Editor Publish Time: 2024-05-31 Origin: Site
Direct printing is printing directly on white fabric or on fabric that has been pre-dyed. The latter is called overprinting (also called dyed background printing). Of course, the color of the printed pattern is much darker than the dyed background color. About 80% of the printed fabrics on the market use direct printing. (Direct printing here generally refers to dye printing, which is used to distinguish it from the paint printing below)
Use a dye that is not resistant to discharge agents to dye the background color. After drying, use a color dye printing paste that contains a discharge agent or a discharge-resistant agent at the same time. During post-processing, the ground color dye at the printing location is destroyed and fades. White patterns on the color ground (called white-out printing) or colored patterns formed by dyeing with floral dyes (called color-out printing). Also known as white pulling or color pulling.
Discharge printed fabrics are very expensive to produce compared to direct printing, and the use of the required reducing agents must be very carefully and accurately controlled.
Chemical agents or waxy resins that can block or prevent dyes from penetrating into the fabric are printed on white fabric. The purpose is to dye the background color to bring out the white pattern. Note that the results are the same as for discharge-printed fabrics, however the method of achieving this result is the opposite of discharge printing.
The resist printing method is not commonly used and is generally used when the background color cannot be discharged. Compared with large-scale production basis, most resist printing is achieved through methods such as handicraft or manual printing (such as wax resist printing).
Because discharge printing and resist printing produce the same printing effect, they often cannot be distinguished through naked eye observation.
Burnout printing refers to printing chemical substances that can destroy fiber tissue at the pattern. As a result, holes are created where the chemicals come into contact with the fabric. The edges of the holes in burnout prints always suffer from premature wear, so the fabric has poor durability.
Another type of burnout printing is that the fabric is made of blended yarn, core-spun yarn, or an interweaving of two or more fibers. Chemicals can destroy one fiber (cellulose), leaving the others undamaged. of fiber. This printing method can produce many unique and interesting printed fabrics.
The printing method is used to locally apply chemicals that can expand or shrink the fibers on the fabric. Through appropriate treatment, the fibers in the printed parts and the fibers in the non-printed parts will have a difference in puffing or shrinkage, thereby obtaining products with regular concave and convex patterns on the surface. Such as pure cotton printed seersucker using caustic soda as bulking agent. Also called embossed printing.
The foaming temperature is generally 110C, the time is 30 seconds, and a 80-100 mesh screen is used for printing.
Since the paint is a non-water-soluble coloring substance and has no affinity for fibers, its coloring must be achieved by coating with film-forming polymer compounds (adhesives) and adhering to the fibers.
Pigment printing can be used for the processing of any fiber textiles. It is more superior in printing blended and interwoven fabrics. It has a simple process, a wide color spectrum, and clear flower outlines. However, it has poor hand feel and low friction fastness.
Pigment printing is direct printing with paint. This process is usually called dry printing to distinguish it from wet printing (or dye printing).
Their light fastness and dry cleaning fastness are good or even excellent, so they are widely used in decorative fabrics, curtain fabrics and clothing fabrics that require dry cleaning.
