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Brightener brightening agent fabric brightening agent manufacturer optical brightener 4bk optical brightening agent 4bk whitening agent for cotton fabric us $3.00$3.50 / kilogram

The whitening effect of optical brightener agent could be estimated by visual method which better under the sunlight or measure by colorimeter. 3.light fastness there is no international standard for testing optical brightener lightfastness in plastics.most tests used din 54004 for reference.

Color iron oxide red 101 130 190 pigment price nano desulfurizer ningbo huaye material technology co., ltd. ... chemical pigment used for rubber plastic / pigment yellow 12/13/83 ... pigment yellow 12 pigment yellow 13 pigment yellow 17 pigment orange 13 pigment orange 34 pigment red 48.1 pigment red 48.2 pigment red 48.3 pigment red 507 ...

Optical brightening agent er-ii by anyang general chemical is a non-ionic 1-(2-cyanostyryl)-4-(4-cyanostyryl)benzene. it is used in the whitening and brightening of coatings. optical brightening…

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