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Optical brightening agent / optical brightener 4bk c.i. 113: optical brightener 4bk c.i. 113: c.i. 113: cas 12768-92-2: structure: stilbene bistriazine derivative: moisture: 5%max: appearance: slight yellow uniform powder: shade:slight bluish: strength: 100±3%: fineness(120 meshes residue): 5%max: application: mainly be used in whitening of ...

Whitening agents / optical brighteners are additives that impart brightness to polymers and intensify the degree of whiteness. these agents function on the basis of the ‘fluorescence effect’; they 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 added during the thermoplastic molding process, rather than added in liquid form afterward, that’s the word “mass-whitening” come from. generally, obas were mixed with powder or granules plastic for flexible pvc, obas were added in …

China solvent dye (solvent red 149) for plastic, find details about china ink, fluorescent pigment from solvent dye (solvent red 149) for plastic…

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