What is the difference between pigment printing and reactive dye printing? What are their advantages

What is the difference between pigment printing and reactive dye printing? What are their advantages? The so-called printing is the process of making dyes or paints into color pastes and partially applying them on textiles to print patterns. The processing method used in order to complete textile printing is called the printing process.

1. Concept

Pigment printing: Pigment printing uses high-molecular polymers (binders) to apply water-insoluble colored substances (pigments) to form a strong, transparent, and wear-resistant colored film on the fabric to mechanically fix the paint on the fabric On the printing method.

Dye printing: In terms of the mechanism of dyeing fibers with dyes, printing and dyeing are the same, except that a certain color of dye is partially applied to the textile according to the pattern requirements in the printing, and the dye is dyed on the fiber after a certain treatment. Get printed products with one or more colors on textiles. Therefore, printing can also be said to be "partial dyeing".

How to distinguish whether fabric dyeing is reactive printing or coating printing?

2. Basic principles

The coloring principle of paint: Pigment printing is a printing method that stops the adhesive forming a strong, transparent, and wear-resistant film on the fabric, thereby mechanically fixing the paint on the fabric.

What is the difference between pigment printing and reactive dye printing? What are their advantages?

Dyestuff coloring raw materials: the process of physical, chemical or physical chemical combination of dyes (or pigments) and textile materials during dyeing, so that textile materials can obtain bright and firm colors.

3. Advantages and disadvantages

Pigment printing

Advantage:

Simple to use, simple process, high labor productivity, and can reduce waste water discharge

Wide color spectrum, high light fastness, clear lines and outlines

Suitable for special printing methods, and also for discharge and anti-dye printing

Easy color matching and good color reproduction

Suitable for fabric printing of various fiber materials, especially blended fabrics.

Disadvantages:

Poor hand feeling, bad dry and wet rubbing fastness.

Fire oil is used in the emulsified paste, which pollutes the air; most of the monomers used to prepare the adhesive are toxic.

The vividness of the color is not as good as the dye printing with the equivalent structure.

Adhesives are easy to crust and clog the mesh.

Dye printing (take reactive dyes as an example)

Advantage:

Many varieties, complete color spectrum, bright color.

It is convenient to prepare the color paste, the printing process is simple, the effect is good, and the defect is less.

Better wet fastness.

Low printing cost, easy to color matching.

Disadvantages:

Most of them are not resistant to chlorine and have low fixation rate. Some reactive dyes have greater directness (affinity), which may cause staining during soaping, especially when printing deep and dense colors.

4. Difference

The biggest difference between dye printing and pigment printing is that pigment printing is combined with the fabric by means of physical bonding, while dye printing is directly combined with the fabric by van der Waals force.

Pigment printing can be used for the processing of any fiber textiles, and it is more advantageous in the printing of blended and interwoven fabrics. It has simple process, wide color spectrum, clear flower contour, but it has poor hand feeling and low rubbing fastness. Their light fastness and dry-cleaning fastness are good, even excellent, so they are widely used in decorative fabrics, curtain fabrics and clothing fabrics that require dry cleaning.

How to distinguish between dye printing and pigment printing?

By comparing the hardness difference between printed and unprinted parts on the same fabric, pigment printing and dye printing can be distinguished. The pigment-printed area feels a little harder than the unprinted area, maybe a bit thicker. If the fabric is printed with dyes, there is no obvious difference in hardness between the printed and unprinted parts.