Publication: Transparent Drawing Supports and Media
Applied On It: Chemical Characterisation
and Conservation Problems in Spanish Art
Deco Jewellery Design
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Publication Date
2017
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De Gruyter
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Abstract
The aim of this study is to characterise the chemical composition of the
support materials, binders and pigments used in sales catalogues of Spanish Art
Deco jewellery to determine the source of the damage observed in the samples
analysed, and to formulate an appropriate conservation method. The difficulty
in maintaining these collections in good condition without dismantling them
lies, on the one hand, in the use of gouache on a variety of supports not usually
used with this aqueous media (nitrocellulose, casein formaldehyde, starched
cotton fabric and sulphurised paper), and on the other, in the vulnerability of
these materials to agents of deterioration found in archives and libraries. The
analysis was performed on a collection of 500 drawings, using the following
analytical techniques: optical microscopy, Fourier transform infrared spectroscopy
(FTIR), gas chromatography mass spectrometry (GC-MS), scanning electron
microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), and
Raman spectroscopy. The study shows the problems arising from storing some
of the before mentioned materials in the same container, and highlights the
need to classify each sample by its component materials and not by designer,
chronology or type of jewellery.