Specifications 1.Direct Fast Black G ( Direct Black 19 )
2.for fabric dye, viscose fabric,cotton dye,paper dye
Property of Direct black 19 (C.I. 35255) : Direct fast black 19 is a kind of black symmetrical powder which dissolves well in water and its water solution is black which reflects a green light. Specification for Direct black 19 (C.I. 35255) :
Item | Specification |
Appearance | Black Symmetrical Powder |
Shade(Compare with Standard) | Similar~Slight |
Strength(is standard) cent | 195±3 |
Moisture | 5.0% Max |
Insoluble | 0.5% Max |
Fineness(180um residue on sieve) | 5.0% Max |
Solubility 80℃ g/L | 100 Min |
Application of Direct black 19 (C.I. 35255) : Direct Black 19 is one of the main varieties of black dye. Mainly used for fabric dyeing and direct printing in cotton, viscose fiber and cotton, viscose fiber and silk, wool interwoven fabric dyeing and direct printing. It mainly dyed black, gray and printing is widely used black, but also makes up a variety of brown color and different depths dye, a small amount of light for the color to increase the chromatogram. When dyeing wool viscose fiber blended fabric, with neutral black BRL bath dyeing, the color is Symmetrical. It can also be dye polyester and fabric with disperse dyes. Direct fast black 19 has a good dyeing rate and would not lose color. After dyeing, dye-fixing agent M and Y can be used. But the shade prone to be green. Urea Resin can prevent the shade from being changed, and can improve fixation value at the same time.