When dyeing conventional polyester with disperse dyes, the dyeing bath is generally controlled to be acidic (pH value is 5 to 6). Because of dyeing under acidic conditions, most disperse dyes have the most pure shade and high dyeing rate. However, the polyester artificial silk fabric must be treated with alkali reduction to make the surface of the fiber concave, which can make the hand feel soft, gloss, drape, etc., but the fabric after the alkali reduction is neutralized and washed. It is still unavoidable that it is alkaline, so there is a basic dyeing method of disperse dyes. Disperse dyes that can be dyed in an alkaline bath are called disperse dyes for basic dyeing.