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What is "Fluorescent Brightener" - Definition & Explanation

A substance that is added to a textile (uncoloured or coloured) to increase the apparent light reflectance in the visible region by the conversion of ultraviolet radiation into visible light and so to increase the apparent brightness or whiteness of the textile.
Fluorescent brightening agents or optical brightening agents or fluorescent whitening agents are dyes that absorb light in the ultraviolet and violet region of the electromagnetic spectrum, and re-emit light in the blue region.

Some other terms

Some more terms:

Silk yarns made from the cocoon of two ilk worms that have nested together. In spinning, the double strand is not separated so the yarn is uneven and irregular with a large diameter in places. The...
A popular staple lightweight sport coating tweed with a rough napped surface. Named for the Cheviot sheep from the Cheviot Hills of Scotland. Fabric is rugged, rather than harsh in hand, with...
A manufactured fiber in which the fiber-forming substance is a long chain of synthetic polyamide in which at least 85% of the amide linkages are attached directly to two aromatic rings. Aramid...
A cotton, wool, and even synthetic fabric of a sateen or twill construction with extra fillings for long floats. Thankfully, it does not resemble true chinchilla fur. It has small nubs on the surface...
Leather that has an opaque color coat and clear top coat. Defects are removed during the tanning process. Finished leather has been buffed and embossed during manufacture to make the hide more...

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