Industry News

Various types of printing 1

1. according to the printing process classification:


1). direct printing (Over print, Wet print)

Direct printing is a method of printing directly on a white fabric or on a pre-dyed fabric. The latter is called overprinting (also called dyeing), and of course the color of the print is much deeper than the background. About 80% of the printed fabrics on the market use direct printing. (The direct printing here refers to the printing of dyes, which is used to distinguish from the following paint printing)


Question: How to distinguish between white printing and dyeing?

If the background color of the fabric is the same as the front and back (because it is a piece of dye), and the printed pattern is much deeper than the background color, then this is the overprint fabric, otherwise it is a white print.

 2) discharge printing (Discharge Print)

The dye is dyed with a dye that is not resistant to the dyeing agent. After drying, it is printed with a dye dye containing a discharge agent or a dye-resistant dye. At the time of post-treatment, the dye of the print is destroyed and decolored. A white pattern (called a white print) on a colored ground or a colored pattern (called a color pull print) formed by dyeing a flower dye. Also known as white or color pull.

Compared to direct printing, the cost of producing a printed fabric is high, and the reducing agent required for use must be carefully and accurately controlled.


Question: How to distinguish whether the fabric is a discharge printing?

If the color of the background of the front and back sides of the fabric is the same (because it is a piece of dye), and the pattern is white or not the same color as the background color, and the background color is relatively deep, it can be confirmed that the printed fabric is discharged.

Careful inspection of the reverse side of the pattern reveals traces of the original background (the reason for this is that the chemical that destroys the dye does not penetrate completely into the opposite side of the fabric).

 3) anti-dye printing

A chemical or waxy resin that prevents or prevents the penetration of dye into the fabric is printed on the white fabric for the purpose of dyeing the base color to provide a white pattern. Note that the results are the same as for the printed fabric, however the method of achieving this result is the opposite of the discharge printing.

The application of the anti-staining printing method is not common, and it is generally used when the ground color cannot be discharged. Most anti-dye printing is achieved by methods such as handicrafts or hand-printing (such as wax-proof printing) compared to large-scale production.

Because discharge printing and anti-dye printing produce the same printing effect, they are often not identified by visual inspection.


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