Blue-ray is red. Dark red powder. In dye in bath of calcium and magnesium ions no influence on color shade; A slight change in iron ion; Copper ions in larger changes. Dyeing appropriate pH value for 4 ~ 8, dyeing and printing in a can. The color red dye for blue-ray, and all the good fastness. All kinds of dyeing methods all have good coptidis thizoma. In the two vinegar on fiber dyeing performance generally, in three vinegar on fiber dyeing performance is better, in the nylon 6 and nylon 66 on the dyeing performance is a bit poor, the dyeing performance in acrylic is bad. But in polyester direct printing, cannot be printing the impression of the discharge.
