Leather has been used in the daily life of humans since ancient times. Leather is obtained from the skin of sheep, cows, goats, horses, buffalo, camels, pigs, snakes, alligators, and some aquatic creatures. Leather is considered a strong, flexible, and long-lasting material obtained from natural sources. Over time to make leather products more beautiful and elegant innovations have been adopted. In which the process of dyeing the leather is of great importance. There are many methods of dyeing leather, one of which is called vat dye. Vat dyes are produced naturally.

Origin of VAT Dye

The word “VAT” which means vessel or container came from medieval Europe. Initially, wooden jars were used for the reduction and application of vat dyes. Vat dye is the oldest coloring material naturally obtained from plant sources. In 1880 first synthetic vat dye was tracked down by Adolf Von Baeyer.

What are VAT Dyes?

VAT dyes are produced naturally. Vat dyes are among the most high-priced dyes with great fastness. They required vatting as they are insoluble and cannot be used directly. The original vat dye is indigo. It is a complex derivative of anthraquinone. Vat dying is a common technique used for coloring cellulose material like cotton, linen, and viscose. Since vat dye is insoluble in water it needs to be soaked and cannot be applied directly. However, they can be reduced in an alkaline solution, which enables them to adhere to textile strands. By further oxidation or exposure to air, the dye is then returned to its insoluble state again.

To dye materials like nylon, polyester, acrylic, and wool vat dye needs to be combined with mordant.

What is Vat Dyed Leather?

Leather goods do not meet consumers’ tastes because of their limited range of colors. Vat dye is found equally effective on protein fiber in leatherwork as it does on cellulose fiber in textiles. Vat dye is derived from pure organic sources that make the product easier to handle. The product is placed directly in dye solutions that have fast coloring properties. The vat dye is considered an indirect dye frequently used on products where frequent washing is required.

The tanned leather is soaked in vat dye dyes followed by polishing. The vat dye gives additional profundity to the product. The product looks lustrous and glossy. Although the vat-dyed leather has exceptional washing fastness yet the color strength of the surface decreases badly when the fines of fiber decrease.

Select currency
CAD Canadian dollar