... It is bright blue powder, which can eliminate the yellow shade of white matter, alkali, heat, light, sub-angle fade ... acids, insoluble in water.To mention the white areas: for paint, knitting industry, paper, detergents and so on.SPECIFICATION:Appearance: ... 05maxWater soluble salts(%): 0.2 maxAbsolute Tinting Strength (%): 100±3Tinting Shade: compare with standard sampleAverage Particle size (um): 1.7- ...