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Using TL to distinguish a genuine object from
a forgery
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"Fat lady", Tang dynasty, China,
AD 618-906
(Photo courtesy Galerie Jacques Barrére,
Paris) |
Modern copy of a Tang dynasty "Fat
Lady".
(Photo courtesy Galerie Jacques Barrére,
Paris) |
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Genuine glow-curve.
TL glow-curve from drilled sample from genuine
Tang dynasty fat lady
A: Natural or archaeological
TL showing appreciable growth above
background.
B: TL from the same sample
after exposure to a laboratory radiation
dose.
C: Background.
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Fake glow-curve.
TL glow-curve from modern Tang-style "Fat
lady"
A: Natural TL showing little
or no growth above background.
B: TL from the same sample
after exposure to a laboratory radiation dose.
C: Background. |
TL is used to measure the total natural radiation
absorbed by a fired ceramic during the time since
it was last fired, normally by the kiln during its
manufacture. It is a scientific approach to dating
that distinguishes between ancient pieces or their
modern imitations. (See "What
else can TL tell us" in FAQs).
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