Fourier Transform Infrared Spectral Analysis of Natural Resins Used in Furniture Finishes
نویسنده
چکیده
This paper establishes an infrared spectral identification key for five natural resins (shellac, sandarac, mastic, copal and rosin) based on their absorbance band positions. These resins may be identified when used in mixtures, such as furniture finishes, at concentrations as low as 1%. Computer methods of deconvolution and spectral subtraction are used to augment this process. The method was validated with reference resins, then applied to finishes sampled from 18th century furniture.
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