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The two standard methods have been acknowledged in domain of TL dating and are used widely for age determination in archaeology and geology.As a dating tool the TL technique has been of great success in authentication of ancient ceramic art objects.The older the pottery, the more radiation it has absorbed and the brighter the pottery sample glows.By measuring the TL, we can calculate how much radiation has been absorbed and use this information to calculate the approximate age of the pottery.Therefore, although ceramic TL dating can in general solve the problem of authentication of ancient ceramics, there are still complexities that require further research and study.
Radioactive measurements on the clay tells us how much radiation the piece is receiving each year.
It includes techniques such as optically stimulated luminescence (OSL), infrared stimulated luminescence (IRSL), and thermoluminescence dating (TL).
"Optical dating" typically refers to OSL and IRSL, but not TL.
Each time the sample is irradiated and then heated, the pre-dose peak increases. The first increase is due to the natural dose which the piece has absorbed over its life-time.
The sample is then given a laboratory irradiation and a second increase is measured.