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Unfortunately, it is not possible to achieve this precision for the majority of art objects.

Among the reasons for this is the small amount of material that may be taken for testing.

The TL laboratory at Daybreak was established in 1977 to make TL available to the art community in general. Studies at Oxford back in the 70s on Romano-British pottery indicated that when all quantities entering the age equation are measured, the TL date of a single potsherd will typically fall within 15 per cent of the known date.

When dates of a number of sherds associated together are averaged, the error is reduced typically to 7-10 per cent. The succeeding 30 years, and increased understanding of the dosimetry, have not brought much improvement.

By comparing this light output with that produced by known doses of radiation, the amount of radiation absorbed by the material may be found.

Last modified 02-Jul-2020 21:41