Methods to improve the fastness of dyes to sunlight

1. Improve the dye structure to reduce the influence on the dye hair color system while consuming light energy, so as to maintain the original color; This is often referred to as high fastness to the sun dye. The price of this kind of dyestuff is generally higher than that of ordinary dyestuff.

2, If the fabric has been dyed, but the sun fastness does not meet the requirements of the case, can also be improved through additives. During the dyeing process or after dyeing, appropriate additives are added, so that the light reaction occurs before the dye when it is exposed to light, and the light energy is consumed, so as to protect the dye molecules. General sub - UV absorbent and anti - UV agent, collectively anti - sunburn fastness improver.