Chromium salts were until recently extensively used in dyeing wool with synthetic mordant dyes. Indigo is among the oldest dyes to be used for textile dyeing and printing. Vat dyes are essentially insoluble in water and incapable of dyeing fibres directly. These pigments were used for dyeing and printing calico and other textiles. Color matching in the textile dyeing industry is essential. These are, weaving, dyeing and printing. Chemical processes such as bleaching, dyeing, lightening and relaxing hair may also be taught. The brand specialized in surface treatment of fabrics and dyeing techniques. There are many forms of yarn dyeing. Romans bought indigo for dyeing and cotton cloth as articles of clothing. The dyeing of yarns is a complex art. Sodium formate is used in several fabric dyeing and printing processes. Copper sulfate can be used as a mordant in vegetable dyeing. Denim fabric dyeing is divided into two categories&colon; indigo dyeing and sulfur dyeing. The fruit also provides material for tanning leather and dyeing cloth.