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 ...

2015年6月15日 · Optical brightening agents (sometimes called Optical brighteners, fluorescent brightening agents (FBAs), or fluorescent whitening agents (FWAs), optical bleaches) are one type of compound which, when applied to a textile material, absorbs the short wavelength electromagnetic radiation (300-400 nm) which is invisible to the human eye, and ...

2020年7月22日 · Optical brightening agents (OBAs), also known as fluorescent brightening agents (FBAs), are chemical compounds that give whitening effect to fabric. They do this by absorbing light in the ultraviolet and violet regionand re-emit the light in the blue region.

2016年4月1日 · Optical brightening agents are chemicals that manufacturers add to products like paper, plastics, and textiles to make them appear whiter and brighter, and to lessen the natural yellowing process that happens over time.

2023年9月11日 · Optical brighteners are chemicals commonly found in laundry detergents and fabric softeners. These additives make your clothes appear whiter and brighter by absorbing UV light and emitting blue light.

Optical brighteners are often referred to as fluorescent whitening agents. Essentially, they are large molecules composed of (excuse my Science) phenyl and heterocyclic groups with conjugated double bonds.

2022年1月20日 · Optical brightening agents (OBA) are used to enhance the appearance of fabric and consumer apparel. On exposure to the UV rays, they absorb the colors in the spectrum to reemit in the blue range. They are generally used along …

Optical brightening, or optical bleaches, are finishes giving the effect of great whiteness and brightness because of the way in which they reflect light. These compounds contain fluorescent colourless dyes, causing more blue light to be reflected.

2022年11月20日 · Optical brighteners are fascinating chemicals because they absorb light in the ultraviolet and violet spectra (340 nm–370 nm), which lie in the electromagnetic spectrum. After absorbing, they emit this light into a different region (blue, 420–470 nm) while displaying the phenomenon of fluorescence.

Optical brighteners also called fluorescent whitening agents (FWAs) are hydrophilic water-soluble compounds used in laundry detergents. They are mainly anionic diamino stilbene (DAS) or distyryl biphenyl (DSBP) derivatives displaying a low aquatic toxicity.