May07

The Quest to find that Pot of Gold.

by Pete Kachulis on May 7th, 2011 at 3:29 pm

The quest to find that pot of gold.

Have you ever gone to a garage sale, yard sale or resale shop and find items of interest. You find a glass plate or glass cup; maybe you find a toy that caught your fancy. You could have found World War II patches, uniforms an old quilt. But was not quite sure about those items you just brought. Are they worth anything or was it just junk that I pay for?

A lot of your questions can be answer by using a black light. That’s right a black light.
Many collectors use these lights on Vaseline glassware, Cut glass, Pattern glass, fabrics, WW II Patches and even Cast Iron.

Vaseline glassware will glow bright green under the black light because of uranium oxide in the glass, Cut glass will glow yellow; reproductions have no reaction or show a blue-white. Pattern glass made before 1925-30 fluoresce yellow; reproductions generally do not have any fluorescence.

Vaseline Glass
Vaseline Glass		 Cut Glass
Cut Glass

Fabrics, WWII patches, uniforms and quilts. Most threads made before 1945-50 are natural fibers such as cotton, silk, etc which generally do not fluoresce. Synthetic fibers- rayon, polyester, etc. made since WW2 all fluoresce. This allows you to detect new military uniforms, new quilts, new doll clothes, etc. Even if old fabric is used to repair an old quilt, the new thread will fluoresce. The black light helps in detecting reproduced military uniforms, patches and etc. Now I Want to tell you up front; I know nothing about German patches, decals or uniforms. I have been told that these black lights help check to see if German Military patches and uniforms are real or repaired in anyway. I do know they work on American military patches and uniforms.


Amercian Miltary Patches
Patches under UV light

You found that old metal toy that looks almost new. Did you know that modern paint will fluoresce or glow under a black light, older paints will not, you can use this to determine whether a painted object is an antique or a newer reproduction as well as to determine whether a piece has been “touched up” and if so, how extensive was the repair.

Maybe your son, daughter, grandsons, granddaughters or you are into rock and mineral collecting. Whether your collection contains rare rocks or minerals you’ve collected while traveling the world or items you simply find pleasing in color and shape, using black light can enhance your collection’s display. Rocks and minerals adsorb the UV light and re-emit light of different color (red, white, green or blue). This is known as Fluorescence and many rocks and minerals exhibit this property. An example of a long wave specimen is wernerite it is a bright golden yellow color under long wave.


wernerite
Minerals

Black lights are also used in finding those pet odors problem in your home, they’re probably hidden in places you can’t see. These lights can find automotive air conditioners and coolant leaks.

Cat Urine
AC Leak

Do you leave in an area where scorpions are a problem? Under a black light, the scorpion is a bright green. It is interesting to note that a deep red light, which is on the other side of the visible range from ultraviolet, is used when catching night crawlers at night.

They are also used in crime scenes to uncover body fluids, finding counterfeit money, ID and document verification, Club hand stamp screening. There is probably a few 100 more uses for a black light.


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