Vat Dye

Vat dye is mainly water insoluble dye.  In an alkali aqueous solution the vat dyes are normally applied to the fiber. Alkali aqueous solutions are subsequently oxidized in the fiber to the insoluble form.

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Viscose Rayon

Viscose is a man made, natural polymer, cellulosic or regenerated cellulose filament or staple fiber. According to U.S. Federal Trade Commission “Rayon is a manufactured fiber composed of regenerated cellulose in which substituent’s have replaced not more than 15% of the hydrogen’s of the hydroxyl groups”.

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