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Optical whitener ksn, optical brightner ksn, optical brightener ksn manufacturer / supplier in china, offering optical brightner ksn for polyester with strong light, pe wax le-ma105 for masterbatches, pe wax le-h1 for pvc water pipe and calcium-zinc stabilizers and so on.

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 …

6. a fluorescent pigment according to claim 4 or claim 5 wherein the cross-linker is glycerine, pentaerythritol, dipentaerythritol, or trimethylolpropane. 7. an ink containing a solvent for the ink and a pigment according to any one of the preceding claims, the solvent being such as not substantially to solubilize the pigment. 8.

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