Analysis of Modern Paints
Although oil remains an important binding medium in artists' paints, today's synthetic resins are being used with increasing frequency. This was true during much of the twentieth century, when artists such as David Alfaro Siqueiros, Jackson Pollock, and Pablo Picasso used commercial or industrial paints based on synthetic resins. The growing popularity of synthetic resin materials carries important implications for the conservation, preservation, and treatment of modern art.
This volume outlines the techniques that are currently employed to analyze the synthetic resins used in modern painting materials, such as pyrolysis-gas chromatography-mass spectrometry, Fourier Transform infrared spectroscopy, and direct temperature-resolved mass spectrometry. For each technique, results are given for standard samples of the principal classes of synthetic binding media, various pigments and extenders, tube paint formulations, and microscopic paint fragments taken from actual works of art.
Primarily intended for conservation scientists, conservators, researchers, and students of conservation, this book will also be of interest to other museum professionals.
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7 The Chemistry of Modern Paints
38 PyrolysisGas ChromatographyMass SpectrometryN
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2EHA absorption acetate Acrylic Color acrylic polymer acrylic resins acrylic solution alkyd resin artists azo pigments binder binding medium blue C—H stretching carbonate characteristic chemical cm'l cm‘l component conﬁrmed contains copolymer diagnostic dimer drying oil DTMS DTMS analysis fatty acids ﬁg Figure ﬁlm ﬁrst fragment ion FTIR Analysis FTIR spectra homopolymers identiﬁed intense peak ion at m/z Learner m/z values Maimeri mass spectrometer mass spectrum methacrylate modern paints modiﬁcation molecular ion molecule monomer nBMA nitrocellulose organic pigments overall pyrogram p(EA-MMA p(nBA-MMA phthalic anhydride phthalocyanine plasticizer pnBA pnBMA poly polyacrylate polymer particles polymerization polymethacrylate polyurethane polyvinyl acetate produced proﬁle Py-GC-MS analysis pyrogram pyrolysis red azo pigments red paint retention Rohm sample Scan Number seen sesquimer sharp peaks shown in ﬁgure shows solvent spectrometry spectrum between scans styrene surfactant synthetic resins Table Tate technique temperature trimer varnish vinyl Wavenumber yellow azo pigments