Basic Dye

Basic dyes are also known as cationic dyes. The cationic dyes can be combined with the acidic group of the third monomer in the fabric to make the fiber dyed. They are special dyes for acrylic fiber dyeing and have the advantages of high strength, bright color and good light fastness.

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Basic Dye

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Basic Dyes

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Basic Dye

Basic dyes are water-soluble cationic dyes that are mainly applied to acrylic fibers, but find some use for wool and silk. 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 are called so since they are salts of organic bases. They are also known as cationic dyes because of the presence of positive charge in the dye molecules under dyeing conditions. During dye application, the negatively charged acrylic fiber attracts the positively charged dye cations for ionic bonding. Due to high attraction between the oppositely charged fiber and dye molecules, there is risk of unlevel dyeing because of high rate of dyeing. This risk may be reduced by careful control of dyeing temperature and used of suitable retarding agents.