Fluorescent Whitening Agent VBL

Specification:
A. Appearance: Yellowish even powder
B. Whilening strength: 100±2 (comparod with standard sample)
C. Moisture: ≤5%
D. Fineness (80 mesh residue): ≤5%
E. Dissoluble in wate ≤0.5 %
C.I. Number: 85#

Property:
A. Main Chemical Composition: Stilbene bistriazine delivative.
B. With bluish violet color.
C. Soluble in softer water as much as 80 time weighh 300ppm in hard water
D. Anionic type. alkali endurable, can be used in one bath of anionic and nonionic surfaetant.
E. To be unendurable ion of copper and iron, etc. Unsuitable to be used in cationic dyestuff and surfactant.

Applicafion:
A. Whitening agent for cellulose base fiber and cotton fabric.
B. Whitening agent for white pattern in discharge printing of cotton fabric.
C. Whitening agent for light colored cellulose base fiber.
D. Whitening agent for paper and detergent.

Process:
A. Exhausting Whitening Process:
VBL: 0.05-0.3% (o.w.f.), Na2SO4: 0-10g/L, bath ratio: 1:5 - 30, pH=7-9, dyeing temperature: 40% - 100 % x 20 - 40min--wash--dry--setting.
B. Padding Process:
VBL: 0.5-3g/l, pH=7-9, speed of the squeeaer: 30-40 meters/min.

Package & Storage:
Packing in wooden drum each container 25KG.
Keeping in a cool, dry place and avoiding sunlight.