Optical brightener 4BK

CAS No.: 12768-92-2

C.I. No.: 113

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Description

Description

Optical brightener 4BK

 

CAS No.: 12768-92-2

C.I. No.: 113

Main ingredient: stilbene derivative

 

Characteristics

Appearance: Light yellow powder

Ionicity: Anion

Water-insoluble: ≤0.5%

Water: ≤5%

Shade: Bluish/Reddish/violet shade (as clients request)

Counter quality: synowhite 4BK (KISCO)

 

Application

Whitening of cotton, linen, silk, nylon and their blends.

 

Process and recommended dosage

Exhaust dyeing method

Rate of use: 0.1-0.8% (o.w.f), bath ratio: 1:10-30 dyeing

Process: 90-100℃*30-40min → wash → bake

 

One bath method

Rate of use: 0.2-0.8(o.w.f), hydrogen peroxide: 5-15g/L,

Bleaching assistant: 0.5-2g/L, NaOH: 1-5g/L

Scouring agent: 1g/L, bath ratio: 1:10-30

Process: 90-100℃*30-40min → wash → bake

 

Packaging & storage

25kg or 50kg iron drum or paper drum lined in plastic bag. Transport as non-hazardous.