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Calcofluor-white or CFW is a fluorescent blue dye used in biology and textiles. It binds to 1–3 beta and 1–4 beta polysaccharides of chitin and cellulose that are present in cell walls on fungi, plants, and algae.
Calcofluor white Fluorescent brightener 28 40622 stilbene 4193-55-9: Calconcarboxylic acid: Patton and Reeder's indicator azo 3737-95-9: Canthaxanthin: Food orange 8 40850 carotenoid 514-78-3: Capsanthin: Paprika: Natural red 34 75133 natural 465-42-9: Capsorubin: carotenoid 470-38-2: 6-Carboxyfluorescein: 6-FAM fluorone 3301-79-9: Carmine ...
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 ...
The fluorescent chemicals in fluorescent paint absorb the invisible UV radiation, then emit the energy as longer wavelength visible light of a particular color. Human eyes perceive this light as the unusual 'glow' of fluorescence. The painted surface also reflects any ordinary visible light striking it, which tends to wash out the dim ...
Fluorescent lamps in various embodiments. Since their introduction as a commercial product in 1939, many different types of fluorescent lamp have been introduced. Systematic nomenclature identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical and illuminating characteristics.
Tide detergent became known for its fluorescent packaging beginning in 1959, but other products such as clothing, posters and hula hoops also used fluorescent colors. [ 4 ] [ 5 ] Daylight fluorescent pigments were also used in safety products such as construction cones , street signs and safety vests due to their high visibility.
A typical "cool white" fluorescent lamp utilizing two rare-earth-doped phosphors, Tb 3+, Ce 3+:LaPO 4 for green and blue emission and Eu:Y 2 O 3 for red. For an explanation of the origin of the individual peaks click on the image. Several of the spectral peaks are directly generated from the mercury arc.
Like all fluorescent lamps, the low-pressure lamps will burn for a long period of time. They will, however, lose their ability to produce a reasonable amount of UV after a short while. Typical lifespans for low-pressure lamps are from 300 to 1,600 hours of actual use although they may light and produce very little UV for as much as 5000 hours.