Basic Black Dye

Cationic Black dyes

Cationic dyes is a kind of textile dyes, also known as alkaline dyestuff and base. They are soluble in water and ionized in aqueous solution to produce positively charged colored ions. The cations of the dye can be combined with the acid group of the third monomer in the fabric to make the fiber dyeing.

Under normal dyeing conditions, the last step of salt formation is an irreversible reaction, which can lead to high fastness and uneven dyeing. The first and last steps are fast, and the second step is slow, which determines the whole dyeing speed. Due to the large affinity between dyes and fibers, the bath temperature, pH value, electrolyte, and retarder should be strictly controlled to obtain the leveling effect.

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