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Typical optical brightener for textiles is er-i, er-ii, 4bk. er-i is also known as fluorescent brightener 199. it’s used in whitening and brightening polyester fiber. er-ii is also known as fluorescent brightener 199:1, used to whitening polyester, polyester/cotton, polyester/yarn, polyester/linen, and other blended fabrics. both cas number is 13001-39-3 and could be in …

A wide variety of optical brightener manufacturer options are available to you, such as plastic auxiliary agents, coating auxiliary agents, and leather auxiliary agents. there are 612 optical brightener manufacturer suppliers, mainly located in asia.

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.

China pigment red 57:1find detail solvent based ink, solvent based ink printers from xiamen azocolor co., ltd.

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