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Alibaba offers 142 optical brightener agent vbl products. such as free samples, paid samples.

Optical brightener whitening agent fluorescent vbl paper optical brightener paper making optical brightener whitening agent fluorescent brightener vbl. us $3.00-$5.00 / kilogram ... manufacturers supply fluorescent whitening agent kcb brightener 367 (cas:5089-22-5)[einecs:225-803-5]

These whitening agents absorb light in the uv spectrum and emit light in the blue region of the visible spectrum to yield a brighter and fresher appearance to the plastic. optical brighteners are used in engineering plastics like thermoplastic polyurethanes, polyvinylchlorides (pvc), styrene homo- and copolymers and polyolefins among others.

Optical brightening agent er-iii cas no. 13001-40-6 chemical name: 1,4'-bis(2-cyanostyryl) benzole specifications appearance slight yellow greenish powder melting point 288-201 ℃ purity ≥99% moisture content ≤0.5 application optical brightener 199 is used to the whitening process of dacron, acetic fiber, polyamide fiber, blends of terylene-cotton etc.

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