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Optical brightener ob. fluorescent whitening agent oba184 optical brightener ob cas 7128-64-5. this product optical brightener ob can be used for whitening thermoplastic plastics, and optical brightener ob can be used for whitening thermoplastic plastics, pvc, ps, pe, pp, abs, acetate fiber, paint, coating, printing ink, etc. optical brightener ob can be added at any stage in …

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.

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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