Fast black base L/S Byname: fast black base LSB, fast black base8B Mole. WT.: 272. 31 Character: Reddish brown powder, acid soluble Usage: Mainly used in coloration of cotton fabric, also can be used in coloration of cheese, mucilage glue fabric, terylene and cotton blend fabric or terylene and mucilage glue fabric, and can be used in direct printing, discharge printing, white resist printing and reactive dyeing grounding reserve printing. This product is the main color developing reagent of cotton darkener, combined with color hydroxybenzene as, as-d, as-bs can dye glow black to green light black. Fast black base R/B Mole.WT.: 272.31 Character: Reddish brown powder, acid soluble Usage: Mainly used in coloration of cotton fabric, also used in bath dyeing and cone dyeing of terylene and cotton blend fabric, terylene and mucilage glue blend fabric and disperse dyes, and it has a good penetrability and stainability to the cheese