BC-VBL

Purpose:

It is mainly suitable for the whitening and brightening of pure cotton fabric of printing and dyeing industry, cotton-polyester blended fabric and pulp fiber, etc. Its fluorescent colored light is indigo light, which can achieve whitening and brightening of processed product and enhance appearance beauty.

Usage:

Take dip dyeing as an example:

VBL use quantity: 0.25-0.35% (o.w.f)

Anhydrous sodium sulphate: 0.5－1.5g/l (bath solution)

PH value: 7- 9 (adjusted with sodium carbonate)

Temperature of dye liquor: 50℃±2℃

Process flow: add VBL and other additive to bath solution in accordance with the above formula, fully stir to make VBL dissolve, then add fabric, increase temperature to 50℃, dye for 20-30min→washing→dehydration→drying (80-100℃) →finished product.

Appearance：Yellowish homogeneous powder

Whitening intensity (share)：≥100±3

Colored light：Indigo light

Degree of yellowing：Above 0.8% (relative weight of dyed fabric) can easily lead to yellowing

Moisture content:≤0.5%

Content of impurity insoluble in water:≤0.5%

Fineness (content of residual product through 100-mesh aperture sieve):≤5

25kg/carton (lined with plastic bag), 50kg cardboard bucket (lined with plastic bag).

The shelf life is 12 months at room temperature.