fluorescent whitening agent VBL

Optical Brightener VBL 1 Appearance :Light yellow powder 2 purple shade glaucoma 3 micro melting properties: soluble in more than 80 times the amount of soft water, the phenomenon began to rally when dissolved, dilute with water to be fully transparent solution after mixing, was dissolved in water, micro-Yi alkaline or neutral. 4 Ionization of: anionic dye bath 5 PH: neutral or slightly alkaline to PH = 8 - 9 6 best stability, acid to PH = 6, alkali to PH = 11, hard water-resistant to 3000PPM, resistance to free chlorine to 75%, intolerant of copper, iron and other heavy metals. 7 strength: the equivalent of 100 standard, 8 whiteness: WCIE: (on the standard difference between the whiteness value)≥ -3 9 fineness: ≤5% (through 180um sieve residue content) 10 moisture content : ≤5% 11 should not be in the water impurities: ≤0.5% Mainly for a white fiber fabric whitening, 2, paper whiteness, 3, light-colored cellulose fabrics by Yan, 4, dial dye printing, white brightening