Optical Brightener NFW 450

Main Composition:

Stilbene derivative

Technical Index:

Appearance:                    yellow greenish granule

PH value(1% water solution):      7.0-8.0

Ionicity:                        Anion

    E-value:                        1100-1150

Whiteness:                     similar with standard

Application:

Be used to bleach and treat in nylon、wool、silk for whiteness. 

It has good excellent Whiteness, and show very good suitability by exhaustion. 

It also can stable to alkalis, giving good optical whitening effect at a wide range of PH value (6.0 to 12.0).

NOTES ON APPLICATION

Exhaust application  (Peroxide Bleach )

Dosage:

OBA NFW450                       0.3-0.6 % (o.w.f)    

        hydrogen peroxide                  5-10%

sodium hydroxide                   1-2g/L

hydrogen peroxide stabilize agent     0.5g/L

Bath ratio:1:10-20   

Temperature: 80-100℃

Time: 30-60 min   PH value: 9-1