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Laundry detergent fluorescing under ultraviolet light. 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) through the ...
4,4′-Diamino-2,2′-stilbenedisulfonic acid is the organic compound with the formula (H 2 NC 6 H 3 SO 3 H) 2 C 2 H 2.It is a white, water-soluble solid. Structurally, it is a derivative of trans-stilbene, containing amino and sulfonic acid functional groups on each of the two phenyl rings.
Optical brightener is used to make paper appear whiter. Optical-brightening agents use fluorescence to absorb invisible radiation from the ultraviolet part of the light spectrum and re-emit the radiation as light in the visible blue range. The optical-brightening agent thus generates blue light that is added to the reflected light.
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CFW is a fabric brightening dye. It is water-soluble and colorless at first. It has an optical brightening effect that has been used since the 1940s to give a whiter appearance to textiles. It is also added to laundry detergents commercially as a brightener. [7]
Optical brightener, an additive used to enhance the appearance of colour of fabric and paper Stress-whitening , where a white line appears when a material is stressed by bending or punching See also
Optical brightening agents 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. After scouring and bleaching, optical brightening agents are applied to make the textile material appear a ...
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