The dyes which are used in reduced state and are then oxidised in the fabric by air are called :

Options

A. vat dyes
B. disperse dyes
C. trimethyl methane dye
D. azo dyes

Answer

A

Explanation

Vat dyes are applied to fabric in the colourless reduced state and then oxidised to coloured state. (ii) Disperse dyes are water insoluble dyes which are applied to fabric in the form of a dispersion of the finely divided dye in solution and along with stabilizer.