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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.

A wide variety of optical brightener cxt options are available to you, such as coating auxiliary agents, ink dyestuffs, and paper dyestuffs. you can also choose from carbon black, adsorbent, and basic dye optical brightener cxt there are 141 suppliers who sells optical brightener cxt on alibaba, mainly located in asia.

China optical brightener catalog of fluorescent brightener kcb for shoe material, leatherette fluorescent brightener agent fp 127 provided by china manufacturer…

Optical brighteners are added during the thermoplastic molding process, rather than added in liquid form afterward, that’s the word “mass-whitening” come from. generally, obas were mixed with powder or granules plastic for flexible pvc, obas were added in …

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