Long wave black light is commonly used by antique lovers and other persons as well to perform various tests. Black light can help you test the authenticity of various items and also to date objects. There are things and signs that are invisible to the naked eye, but they fluoresce in the presence of ultraviolet light. The use of black light will not give you all answers, but it is a fairly good method.
Identifying porcelain repairs
It is highly recommended that prior of purchasing or selling a porcelain item to test it for possible repairs with black light in a darkened room. A well executed repair job might not be easily detected with the naked eye, but it will become visible in black light. Porcelain is usually repaired with glue which will fluoresce. Also, under ultraviolet light modern paints glow as well.
Check for reproduction glass
Vaseline and Depression glass will fluoresce under ultraviolet light because of the glass’s uranium oxide content. It is said that colorless American pressed glass manufactured before 1930 will glow yellow. On the other hand, reproductions will not. However, it is preferable to conduct further researches to verify the authenticity of cut glass.
Investigate works of art
Paintings can be easily tested for repairs and fine touch-ups, as modern paintings will glow in the presence of black light. With the use of black light you can easily spot hairline cracks that are otherwise invisible in oil paintings.
Various paper products, photos, books, signs and old postcards before the 1930s seldom fluoresce under ultraviolet light. On the other hand, the components of modern papers, such as and chemical dyes and bleaches will glow under black light. This is how you can spot reproductions in various ephemera and fake documents. It is still recommended to visit an expert when you want to buy a rare paper document, to help you verify its authenticity.
Modern fibers in general, such as polyester and rayon will glow in the presence of black light, which is helpful if you want to date vintage clothing, rag dolls, quilts and various other cloth items. Keep in mind that today’s laundry detergents contain numerous additives that can make old textiles to fluoresce under black light. Besides the black light testing you should also consider the materials used to make the clothing, design, and provenance and manufacturing techniques as well.
Verifying cast iron
Cast iron was used to make numerous door stops, mechanical toys and other valuable vintage banks in the early 1900s. Passionate collectors find these items with original paint quite valuable. Cast iron pieces can be tested for painted repairs and reproduction as modern paints will glow in most cases. To make sure the item is as old as you estimate you should also check for other wear and age indications as well.
Detecting various bacteria
Certain types of bacteria glow when are exposed to ultraviolet black light. These bacteria include certain strains of Shigella and Salmonella.
Fluorescent dye leaks
Car oil, coolant, air conditioners and various other liquid systems can be easily checked by adding a little fluorescent dye. The spots with leakage will glow later on in the presence of ultraviolet light.
Pest and pet stains
If you are facing pet odors in your house they are probably in places that are hidden in various places. Black light can help you spot the sources of odor behind furniture, under beds and in corners. A portable black light can help you easily detect feces, urine and various biological contaminants.
Ultraviolet light is frequently used in numerous medical treatments and to help Psoriasis effects. When the skin is exposed to ultraviolet light it produces vitamin D. The exposure to ultraviolet light stimulates the calcium absorption of the body.
Ultraviolet light can be used to verify if your cat has Ringworm-A as they will glow under black light.
The authenticity of your ruby can also be verified with the help of black light. The quality of gemstones can be easily established with ultraviolet light.
Stop In the 66 Mall on Historic Route 66 in Baxter Springs, KS and get your ultraviolet light today!
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