Пример применения УФ на зарубежном ресурсе:
"Both new frosted pressed Czech glass and genuinely old (pre-1939)
Czech glass are frequently represented as Lalique. One of the easiest
tests to separate authentic pre-1945 clear frosted pressed Lalique
from any frosted Czech glass is with a black light.
All clear frosted pre-1945 pressed Lalique will fluoresce yellow, and
sometimes peach, under long wave black light. All clear Czech
glass–pre-1939 or modern–fluoresces blue/white. After the war,
the formula for Lalique changed. Authentic clear pressed Lalique
made after 1945 fluoresces blue-white the same as all Czech cleaer
frosted glass, new or old.
Because so many records were destroyed in the war, much remains to be
rediscovered about original Czech glass. Lalique, on the other hand, has
been thoroughly documented and has a well known history. All authentic
Lalique patterns and shapes are easily verified by looking through Lalique
catalogs and reference books. If you can't find it listed, it's very doubtful
it's Lalique.
Although virtually all original pressed Lalique was marked, marks are the
least reliable indicator of age3. Early Lalique marks are widely forged on
Czech glass as well as Lalique made after 1945. The black light test, glass
quality and amount of hand finishing are all more important in determining
authenticity than marks."
https://www.realorrepro.com/article/...ass-or-Lalique