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Fluorescent Whitener 4BK

Main ingredient

Stilbene derivative

Specification

Appearance:

light yellow powder

Ionicity

anionic

Shade

fain violet

Fastness

Light

4-5

Washing

4-5

Perspiration

5

Ironning

5

Stability

Hydrogen peroxide

stable

Hypochlorite

non-stable

pH

4.5-12

Application

for whitening of cotton and cotton/polyester fabrics.

Usage

.Exhaust dyeing method

Rate of use: 0.1-0.8%(o.w.f),bath ratio: 1: 10-30 dyeing temperature: 90-100°C,30-40min

.One-bath method

Rate of use: 0.1-0.8%(o.w.f),hydrogen peroxide: 5-15g/L,stabilizer: 1-5g/L,NaOH: 2-4g/L

scouring agent: 0.5-1g/L,bath ratio: 1: 10-30,temperature: 90-100°C,30-40min

Packaging & Storage

Plastic barrel, n.w. 50kg. Shelf life: 6 months at room temperature.

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