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These textile pigments are available in bright, brilliant and strong shades. it is amongst few red pigments which has very good fastness to soap and hence used in making printing inks for soap wrappers and also in the preparation of textile printing emulsions.

Er-iichina manufacturers, factory, suppliers we often stay with the principle "quality very first, prestige supreme". we have been fully committed to supplying our consumers with competitively priced high-quality goods, prompt delivery and skilled provider for er-ii, ob for plastic, paint dyestuffs optical whitening, cbs-x(c.i. 351) for detergent, we adhere to client 1st, top quality …

The whitening effect of optical brightener agent could be estimated by visual method which better under the sunlight or measure by colorimeter. 3.light fastness there is no international standard for testing optical brightener lightfastness in plastics.most tests used din 54004 for reference.

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 …

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