That means green is stronger in the edge than other part. Or English product of green uranium glass is a cut-glass, and the green fluorescence comes out from the edge of the glass. Is impossible to discriminate under sun-light. This green color also comes from small amount of eitherĬopper compound or chromium, and not limited to uranium. Produced mass of green uranium glass is maybe 1/10 compared with yellow Right-hand photo shows white color at the top, due to heat treatment. In that case, it is difficult to discriminate under sun light, because its edge is round. Most produced color of the vaseline glass is transparent yellow. It is the transparent glass which you can see through, and its color is mainly yellow but slightly greenish. If the glass is a cut glass (where its edge is ground by the grinding machine), and when it is under sun light or ultra-violet light, the characteristic green fluorescence comes out from the sharp edge portion, But, most yellow vaseline glass is a pressed glass. Do not look UV light closely for long time.) Or blue/greenish-blue fluorescence means NOT vaseline (or uranium) glass.Ī portable ultraviolet rays lamp is so called a "BLACK LIGHT",Īnd you can buy in a large electric appliances store. (Although the radiationįrom uranium atom in vaseline glasses is negligibly small, UV light is In other words The fluorescence of vaseline glass is always green. And its green color can not be changed by anyhow, even if mixing with other color glass. This green light wavelength (550 nano-meter) is unique to the uranium atom. The atom instantly releases its activated energy as visible light of green color. When the uranium atom absorbs the energy of the ultraviolet(UV) rays, it is activated by the UV energy. In USA define "vaseline glass" only for these clear yellow or These clear yellow or yellow-green glass, sometime in 1930s. Then, the nickname became a "Vaseline glass" for That the original color of vaseline petroleum jelly (salve) was a strange It is said that the name of "Vaseline glass" came from the fact The uranium glass is described by its color. Here, the members of JUGCC (Japan Uranium Glass Collectors Club) have contributed This is a basic requirement of all vaseline/uranium glass collectors. Glass)", and "What is genuine vaseline glass and what is not?" This home page describes "How to discriminate vaseline glass (uranium Colors of Vaseline Glass (Colors of Unanium Glass)
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