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Optical brightener brightening colors or mask yellowing by optically yield a brighter, fresher appearance. it’s synonym name oba which is also known as fluorescent whitening agent(fwa) or fluorescent brightening agent(fba). typical optical brightener for paper are vbl, bbu, hs, hst. vbl is also known as fluorescent brightener 85.

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…

Nov 12, 2020 · buyers can post inquiries without registration and check out all the latest buying guide & chemical market reports you need in our industry resource center. the above is the search results for chinese optical brightener, click for more recommended manufacturers & suppliers listings such as fluorescent brightener, fluorescent whitening agent, ob-1.

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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