What is color fastness?

It speaks about the elastic color's resistance to various processing and usage-related effects.

Why is color fastness testing necessary?

Color fastness has a direct impact on the well-being and security of people. The dye molecules and heavy metal ions released when the color wears off and fades could be absorbed via the skin and pose a health risk to people.

How do Huayan do?

To increase color fastness, choose dyes that perform well. To assure color fastness, develop a reasonable dyeing and finishing method.