Glossary:IAS

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Infra-Red Absorption Spectrometry
A technique used in the characterisation of raw materials, it has been particularly useful in distinguishing ambers from different sources: the organic compounds in the amber absorb different wavelengths of infrared radiation passed through them.

Source
Renfrew, C. and Bahn, P. (2000) Archaeology: Theories, Methods and Practice. London: Thames and Hudson. ISBN: 0-500-28147-5

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