Basic dyes are cationic dyes. Usually, acetic acid is added to the dye bath to help the uptake of the dye onto the fiber. Basic dyes are also used in the coloration of paper. Basic dyes also called cationic dyes, because in solution basic dye molecule ionizes. Causing its colored component to become a cation or positively changed radical. In the market, basic dyes are obtained as a basic salt usually chlorides; but sometimes oxalates or double salts with zinc chloride (ZnCl2). Basic dye specially used for jute fiber, also used in wool, silk, acrylic dyeing.

Properties of the basic dyes

They are important for high & brilliant shade.

They are easily soluble in alcohol but not easily in water

Dyes decompose at boiling temperature.

In solution, dye protein is a cation.

The basic dyes are poor fastness to light.

No affinity to cellulosic fiber except jute fiber.

They are suitable for protein fiber.