That said, there are a number of materials that will fluoresce under an ultraviolet UV or "black light", even clean white sheets appear to do so.Īt above left we illustrate our darkroom test set-up for light source comparisons, in this case with a "blacklight" or UV ultraviolet light bulb (Woods lamp) installed in our test fixture using a 13W bulb produced by Feit Electric (photo at left). Reply: What materials glow under UV lighting & what is a "black light"?Ī competent onsite inspection by an expert usually finds additional clues that help accurately diagnose a problem concerning building contaminants or conditions. I will be checking with a local 'home' inspection type company next week regarding this. It should also be noted that when I purchased my black light over a year ago, for fun I checked out my apartment and carpeting for mold, pet urine, etc. I walk around bare footed in my apartment.īathing removes the powdery substance from my feet and my physician says I have no mold or other infection in my feet. It should also be noted that my feet and toe nails show the same yellowish glow. Of course, the iridescence is greater at night when I can darken the apartment, but it can be seen under the black light during the day. These areas do not appear in normal daylight, but do appear under a black light. I further checked the baseboards, some less trafficked areas behind the bed and other furniture, and the furniture and counter surfaces and found the same yellowish areas. The areas are ‘dusty’ in appearance and appear in a variety of patterns. This caused me to check the living room and dining area carpeting, where I found the same type yellowish glowing areas. I noticed several yellowish glowing spots in the bedroom carpeting. I discovered this as I was using a black light to look at some iridescent fishing lures the other evening. Watch out: While in our OPINION the ordinary use of UV flashlights and UV lamps for purposes of building or environmental inspection or security screening constitutes no unusual health risk, excessive or inappropriate exposure to high levels or protracted durations of ultraviolet light may be unsafe and possibly carcinogenic.Ī much cited study indicated that "The risk was not significantly or consistently raised for exposure to fluorescent lights at home or at work." Question: using a black light to track down iridescent powder substance in carpetĬan you be of help identifying a carpet (?) problem I am having in my apartment?
LIGHT, GUIDE to FORENSIC USE - separate article.HOWTO USE UV LIGHT to find ODORS, URINE, ANIMALS &c.
MINI PORTABLE BLACK LIGHT HOW TO
One of the most effective uses of UV light in building investigations is the tracking down of odors & contaminants such as urine, urine stains, or odors & allergens from pets, rodents, or other animals, even human.īut because a large number of materials will fluoresce under a black light, we need to give some thought to how to interpret what our UV light is actually revealing when we shine it on a building material or surface.ĭiscussed here: Catalog of materials that fluoresce under black light (UV light) & sources of UV lights, supplies. Guide to Using Ultra Violet Light (UV light or "black light") for Forensic Building Investigations We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Small black lights are available from pet supply stores, art supply stores, and forensic and police equipment suppliers and are generally inexpensive. We also use UV light to screen buildings for other body fluids, including blood. We provide a catalog of materials that glow or flouresce under UV light and cite scholarly-research for many of those materials and the forensic use of black light. We describe the use of a black light, UV light to screen buildings for pet urine or urine from humans or other animals even where no stains are visible in or around buildings. This article describes uses of UV light in building investigations. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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