Vat dyes mainly include indigo, vat yellow, vat orange, vat green, vat blue, vat brown, vat red, etc.

They are mainly used for dyeing and printing natural fibers such as cotton, linen, silk, and wool, as well as synthetic fibers.

They have the characteristics of bright color and good fastness. The following is a more detailed introduction to reducing dyes:

The reason why vat dyes are named is because they undergo a reduction reaction during the dyeing process.

Under alkaline conditions, these dyes can be vat to soluble chromophores, allowing them to penetrate into the fibers.

When the dye is re oxidized in the fiber, it returns to insoluble dye and adheres to the fiber.

**Indigo * *:

-Indigo is a long-standing vat dye widely used for dyeing cotton fabrics, especially blue denim fabrics. The color dyed with indigo is deep and full of charm, and it is washable and sun resistant, making it very suitable for making durable clothing.

-In addition to textile dyeing, indigo is also used in the fields of food, cosmetics, and medicine, such as as as a coloring agent for certain foods.

**Vat Red * *:

-vat red is a general term for a series of red reducing dyes, including various dye varieties with different structures and properties. They can be used for dyeing various fibers, giving fabrics a bright red hue.

-Restoring red is not only used for dyeing textiles, but also plays a role in leather dyeing and printing, adding rich colors to leather products.

Overall, vat dyes play an important role in industries such as textiles and leather due to their excellent dyeing performance and fastness.