Importance of identification of organic colorants in artworks for the assessment of authenticity

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023281%3A_____%2F19%3AN0000038" target="_blank" >RIV/00023281:_____/19:N0000038 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Importance of identification of organic colorants in artworks for the assessment of authenticity
Original language description
Identification of pigments and dyes is an integral part of the assessment of an artwork’s authenticity. Presence of synthetic organic colorants may be a clue for the determination of the time of origin of the artwork as time of discovery and production of these materials is usually well documented. During the first half of the 20th century most of the commercially important classes of organic colorants were discovered although first organic pigments were synthetized at the end of the 19th century. Phthalocyanine pigments (blue or green) are widely used on artworks – original or fake. Quinacridone reds and arylide yellows were identified on several artwork’s counterfeits. Methods of molecular spectroscopy (infrared and Raman) are convenient for identification of most organic colorants. Both methods could be used non-invasively allowing analysis of artworks (e.g. drawings) where sampling is not possible.
Czech name
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Czech description
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Project
<a href="/en/project/VI20172020050" target="_blank" >VI20172020050: Comprehensive Instrumental Methods for the Assessment of an Artwork's Authenticity, a Material Database of the 20th century</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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