Direct Black G ( Direct Black 19 ) for textile dye

Specifications 1. Direct black G, Black G, Black 19

2. textile dye, for cotton, viscose fiber, silk

3. black powder

Product Description   Structure Fomula of Direct black 19 (C.I. 35255)  :     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.