Application of Optical brightener in fabric printing

The process of forming colored patterns or patterns on fabrics is called fabric printing. Optical brightener is widely used in fabric printing, such as whitening of printed fabric on the white ground, pigment printing, fabric discharge printing and anti white printing. The use of Optical brightener in fabric printing can greatly improve the quality of the printed fabric, making the white part whiter and the colored part brighter.

Pigment printing paste

Pigment printing relies on the action of an adhesive to mechanically fix the color onto the surface of a fabric. In addition to printing colored patterns, it can also print white. Printing white coating paste is called coating white paste. The basic composition of white paste for pigment printing is: adhesive, white pigment, Optical brightener, crosslinking agent and paste.

Silk fabric printing with white paste

Silk printed fabrics are high-grade products with many varieties. Some white thin stem patterns need to be painted white to achieve a strong three-dimensional printing effect. The amount of Optical brightener is usually 0.1% -0.3%.

Fabric printing whitening paste

Discharge printing is the process of printing discharge paste on dyed fabric, which eliminates some of the ground color of the pattern through post-treatment, resulting in the formation of white ground flowers. This process is called discharge. Discharge paste is also called white discharge paste. Adding Optical brightener to white discharge paste can improve the whiteness of white discharge and printing effect.

Printing anti white paste

Anti dye printing is a printing method that prints first and then dyes. Due to the addition of anti dye agents in the printing paste, the ground color of the patterned area cannot be dyed during dyeing, resulting in a colored white flower or color map pattern. Anti dyeing printing is simpler in process and lower in cost than discharge printing, so it is relatively widely used. Adding Optical brightener to the anti white paste can increase the whiteness of the anti white part, thus making the color set off more bright.