黑光燈能激發哪些物質發光？

生物液
犯罪現場調查人員通過使用黑光燈以及有時使用附加的噴灑化學劑來尋找干燥和清理后的血跡，以尋找犯罪證據。在黑光燈下，血液會變成黑色，除非噴灑了使它發藍光的魯米諾。當被黑光照射時，唾液，精液和尿液也會發光。大多數生物流體都含有熒光分子以幫助它們發光。在Fido排尿的地方搜尋時，請在暗室中使用黑光燈查找并清潔它，而不是用鼻子。

由于諸如精液，唾液和陰道液之類的體液是天然熒光的，因此使用光源提供了一種獨特的定位方法。犯罪現場調查人員可以縮小污漬的特定位置以進行收集，而不必測試整個大塊的證據，例如床墊，地毯，床單，衣服等。光源照明。因為幾乎所有體液都固有地具有熒光性，所以光源越強大，越可調，您就會發現更多的證據。盡管體液在普通的紫外線黑光下會發出熒光，但是許多您會發現其上的物品（包括衣服和床單）也會發光并阻礙其檢測。因此，有必要調諧到可見波長（色帶）以消除背景干擾。考慮到您將在引人注目的重大犯罪案件中尋找體液，以及DNA使用的增加擴散，您可以揭示的體液證據越多越好。

洗衣用品
某些洗衣用品中含有熒光物質。通常，制造商添加熒光劑以使其比亮白色更亮。清潔劑殘留物或溢出物可能不會留下可見的污漬，但是當受到黑光燈照射時，它們會發出詭異的藍色光芒。洗衣粉中的這些元素也可能導致照片中的白色衣物看起來呈藍色陰影。

維生素，有毒油和隱形墨水
在黑光燈下發光的其他物質或溢出物包括車輛內使用的防凍劑。如果防凍劑吸收了寵物，則會對寵物造成傷害，因此，如果車庫中有任何需要排泄物的溢出物，那么黑光燈就可以解決問題。一位研究人員開發了一種獲得的噴霧劑，當該噴霧劑用于黑光衣服時，可以檢測到源自毒橡樹和有毒常春藤植物的有毒油漆酚，可導致身體發癢的皮疹。由檸檬汁制成的不可見油墨在黑光的光度下變得易于閱讀。灑落和壓碎的維生素可能不會留下污漬，并且可能會消失在地毯中，除非您對它們施加黑光以清潔該區域。

What Kind of Invisible Stains Do Black Lights Detect?
Vitamins, Toxic Oils and Invisible Ink
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.

Biological Fluids
Crime scene investigators hunt for evidence of a crime by using a black light and sometimes an added sprayed-on chemical to locate dried and cleaned up blood stains. Beneath a black light, blood turns black, unless sprayed with luminol which gives it a blue-glow. Saliva, semen and urine also glow when hit with a black light. Most biological fluids contain fluorescent molecules to help them glow. 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.

Laundry Supplies
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.