Black light is a useful tool in judging the identity and age
art glass vases, figurines and more. Different types and ages
of glass can fluoresce different colors, and the color of fluorescence
can be helpful in identification. As there are variations and
exceptions, the fluorescent colors should be used only as a general
guide. The expert collector and dealer also look at the color,
physical nature, style, visible stamps, provenance, etc.
The following are a few examples of glass and fluoresce:
Lalique art glass
The Frenchman Rene Lalique produced some of the finest glassware.
Lalique art glass from before 1945 typically fluoresces yellow
and sometimes peach, but different colors after.
Many 1800s marbles fluoresce, some bright green and yellow. Many
believe post WWII marbles to do fluoresce
Vaseline glass is a popular form of yellow-green glass. Under
black light genuine vintage and modern. Vaseline glass fluoresces
a bright green. Glass that resembles but is not Vaseline fluoresces
differently, including peach, orange or less bright lime green.
Modern reproductions of Burmese Art Glass
Old Burmese art glass tends to fluoresces a bright yellow, while
modern reproductions usually do not.
Dating American colorless pressed glass
Making glow in
the dark art and crafts
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American colorless pressed glass made from before 1925-30 fluoresces
brightly. Modern reproductions do not.