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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.

Molecular formula:c 18 h 15 cln 2 o 6 s molecular weight: 422.84 cas registry number:7023-61-2 manufacturing methods :2-amino-4-chloro-5-methylbenzenesulfonic acid diazotization, and 3-hydroxy-2-naphthoic acid coupling, and then into calcium salt. properties and applications:brilliant red, shallow blue light pink.purple red powder. insoluble in water and ethanol.

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, optical brightening agents (obas), fluorescent brightening agents (fbas), or fluorescent whitening agents (fwas), are chemical compounds that absorb light in the ultraviolet and violet region (usually 340-370 nm) of the electromagnetic spectrum, and re-emit light in the blue region (typically 420-470 nm) by fluorescence.these additives are often used to enhance …

Manufacturer for red lake C color pigment for coating manufacturer with years's encounter, from China.We mainly provide Manufacturer for red lake C color pigment for coating with premium quality and competitive cost.we've got an expert Manufacturer for red lake C color pigment for coating solution designers.Our item is via the national qualified certification.


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