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Parafilm M Laboratory Film 1. Bottles and Jars Glass Dropper Bottles 9. When hunting down that spot where Fido urinated, use a black light in a dark room to find and clean it instead of your nose. Certain laundry supplies contain fluorescent materials within them. Generally, manufacturers add fluorescers to make them brighter than bright white. Detergent residues or spills may leave no visible stain, but when subjected to the rays of a black light, they glow with an eerie blue glow.
These elements within laundry detergents may also cause white clothing in photographs to appear as a shade of blue. Other substances or spills that glow beneath a black light include the antifreeze used inside a vehicle. Antifreeze harms pets if they ingest it, so if you have any spills in the garage that require ferreting out, a black light does the trick.
A researcher developed a patented spray that when used on clothing with a black light can detect the toxic oil urushiol derived from poison oak and poison ivy plants that leads to an itchy rash on the body. Invisible inks made from lemon juice become easy to read beneath the luminosity of a black light. Spilled and crushed vitamins may not leave a stain and may disappear into the carpet unless you apply a black light to them to clean the area.
As a journalist and editor for several years, Laurie Brenner has covered many topics in her writings, but science is one of her first loves. Her stint as Manager of the California State Mining and Mineral Museum in California's gold country served to deepen her interest in science which she now fulfills by writing for online science websites. Fluorescent rocks include fluorite, calcite, gypsum, ruby, talc, opal, agate, quartz, and amber. Minerals and gemstones are most commonly made fluorescent or phosphorescent due to the presence of impurities.
The Hope Diamond, which is blue, phosphoresces red for several seconds after exposure to shortwave ultraviolet light. Many body fluids contain fluorescent molecules. Forensic scientists use ultraviolet lights at crime scenes to find blood , urine , or semen.
Blood does not glow under a black light, but it reacts with a chemical that does fluoresce, so it can be detected after this reaction using ultraviolet light at a crime scene.
Bank notes, especially high-value bills, often glow under ultraviolet light. Some of the whiteners in laundry detergent work by making your clothing a bit fluorescent. Even though clothing is rinsed after washing, residues on white clothing cause it to glow bluish-white under a black light. Blueing agents and softening agents often contain fluorescent dyes, too.
The presence of these molecules sometimes causes white clothing to appear blue in photographs. Banana spots glow under UV light. Shine a black light on a ripe banana with spots. Check out the area around the spots. Many plastics glow under black light. Often, you can tell a plastic is likely to glow just by looking at it.
For example, neon-colored acrylic may contain fluorescent molecules. Other types of plastic are less obvious. Plastic water bottles usually glow blue or violet under ultraviolet light. White paper is treated with fluorescent compounds to help it appear brighter and therefore whiter.
Sometimes forgery of historical documents can be detected by placing them under a black light to see whether or not they fluoresce. White paper made post contains fluorescent chemicals while older paper doesn't. If you bought make-up or nail polish with the intention of getting it to glow under a black light, you knew what to expect.
However, you might want to check your regular makeup too, or next time you pass a bright fluorescent light emits UV or black light, the effect might be more "rave party" than "office professional. Hint: The bars at many restaurants have black lights to make drinks look pretty. If you have a jellyfish handy, see what it looks like under a black light in a darkened room. Some of the proteins within a jellyfish are intensely fluorescent. Corals and some fish may be fluorescent.
Many fungi glow in the dark.
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