Optical brightener VBL

Appearance:Light yellow to yellow uniform powder
UV absorption:370±10
Max UV absorption wavelength:348nm
Performance   characteristics:Blue-violet tone;Max hard water resistance is 300ppm and max free chlorine resistance is 0.25%;Not resistant to metal ions,such as copper,  iron ion,etc;Stable with sodium hydrosulfite,but not resistant to high-temperature baking;Common light fastness and level dyeing property.
Application:
Whitening of cotton fiber,viscose;Brightening of light tone or printed fabrics;Whitening of vinylon,chinlon products;Whitening of paper pulp or coating;Synthetic detergent.
Recommended dosage:
1.0.1-0.2%for cotton dip-dyeing;0.5-3 g/L for pad dyeing;1-2 g/Lfor starching; 2.Paper-making:0.2-0.5%;
3.Syntheticdetergent:0.1-0.5%.
Package:  N.W.25kg fiber drum,kraft bag or PE bag.