Description: Dealers and collectors who authenticate antique glass are grateful for the phenomenon that turns clear glass yellow under a long wave black ultraviolet light; it proves the glass was manufactured before 1915, when manganese -- the element that makes glass glow yellow -- was discontinued. This is a color variant on "Vaseline" glass, which glows green because of uranium salt compounds in its chemical makeup. One needs to account for the variations in ultraviolet lights used for testing, and their degrees of fluorescence. Light may be absorbed at one fluorescent wavelength, then emitted at another, lower energy wavelength along the ROYGBIV, or visible light, spectrum. Manganese, lead, uranium salt or variable wavelengths are all factors that can produce a yellow glow in clear glass . shipping cost, if you purchase more than one lot, please , wait for me to sent you conbine shipping cost to save you on shipping cost before you pay. Glass Early 1880-1900 s. Selling as it is Old antique. You are purchasing 2nd photo antique glassware which , highly recommend collectors collection.
Price: 71.2 USD
Location: San Martin, California
End Time: 2024-10-01T18:03:02.000Z
Shipping Cost: N/A USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: Unmarked
Antique: Yes
Type: glassware
Original/Licensed Reproduction: Original
Color: Green
Material: Glass
Year Manufactured: 1900
Production Style: Vaseline
Item Width: 7.25”
