Vat Red 15 Vat Bordeaux 2R is a very important vat dye, also known as Shilin dye, mainly used for dyeing cellulose fibers such as cotton, linen, and viscose.
Due to its unique dyeing principle, the usage process is more complex than direct dyes or reactive dyes, requiring four key steps: reduction dissolution, dyeing, oxidation, and post-treatment.

Vat dyes themselves are insoluble in water and cannot be directly dyed.

It needs to be reduced in a strongly alkaline solution of sodium hydrosulfite to generate a water-soluble Leuco form.

Hidden color bodies have an affinity for fibers and can stain them.

After dyeing, the hidden color body is transformed back into the original insoluble dye inside the fiber through oxidation, thus obtaining a firm color.

Our factory is producing vat red 15 for 30 years with reliable quality and competitive price. Welcome your inquiry for vat dyes.