Optical Brightener 4BK

Chemical Name: Stilbene

Specification 

Appearance: Slight gray-yellowish powder

Ion: Anionic

PH value:7.0-9.0

Applications:

It can dissolved in the hot water, has high whiteness increasing power, excellent washing fastness and minimum yellowing after high temperature drying.

It is suitable for brightening cotton or nylon fabric with exhaust dyeing process under room temperature, has powerful strength of whiteness increasing, can achieve extra high whiteness.

 Acts as a whitening agent. Possesses strong fluorescence, excellent whitening performance and slight bluish shade. Has high light stability, chemical stability and good acid stability. Is stable in perborate and hydrogen peroxide. Used in polyester/cotton blend.

Usage

4BK:0.25 ~ 0.55%(o.w.f.)  

Procedure: fabric :water 1:10—20

90—100℃ for 30—40 minutes

Package and Storage

1. 25KG bag

2. Store the product in a cool, dry, well-ventilated area away from incompatible materials.