Oils, paintings and chemistry
In oil paintings artists use oils to apply pigments. These oils firstly are liquid and then solidify in a thin film. Many chemical reactions are involved in drying and also in the aging of these oils. Drying is a continuous process that begins with the oxidation of insaturated fatty acids from trigl...
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| Format: | Article |
| Language: | English |
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Associação Profissional de Conservadores - Restauradores de Portugal
2005-01-01
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| Series: | Conservar Património |
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| Online Access: | https://doi.org/10.14568/cp2_1 |
| _version_ | 1818141675597332480 |
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| author | Maria Eduarda Machado de Araújo |
| author_facet | Maria Eduarda Machado de Araújo |
| author_sort | Maria Eduarda Machado de Araújo |
| collection | DOAJ |
| description | In oil paintings artists use oils to apply pigments. These oils firstly are liquid and then solidify in a thin film. Many chemical reactions are involved in drying and also in the aging of these oils. Drying is a continuous process that begins with the oxidation of insaturated fatty acids from triglycerides to originate peroxides. These compounds suffer a cascade of reactions that lead to cross linking bonds between fatty acids residues, transforming the oil in a solid film. Identification of the film oil is possible using the palmitic/stearic ratio (P/S) by chromatographic (GC) and/or spectroscopic techniques. Sterol composition, phytosterols or cholesterol, determined by GC-MS or FTIR techniques, allows investigators to distinguish between oil painting and a temper one that used egg as the binding medium. |
| first_indexed | 2024-12-11T11:03:39Z |
| format | Article |
| id | doaj.art-5c84282f5c284fd2b08d50dbd50e1eb4 |
| institution | Directory Open Access Journal |
| issn | 1646-043X 2182-9942 |
| language | English |
| last_indexed | 2024-12-11T11:03:39Z |
| publishDate | 2005-01-01 |
| publisher | Associação Profissional de Conservadores - Restauradores de Portugal |
| record_format | Article |
| series | Conservar Património |
| spelling | doaj.art-5c84282f5c284fd2b08d50dbd50e1eb42022-12-22T01:09:47ZengAssociação Profissional de Conservadores - Restauradores de PortugalConservar Património1646-043X2182-99422005-01-01231210.14568/cp2_12_1Oils, paintings and chemistryMaria Eduarda Machado de Araújo0Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, PortugalIn oil paintings artists use oils to apply pigments. These oils firstly are liquid and then solidify in a thin film. Many chemical reactions are involved in drying and also in the aging of these oils. Drying is a continuous process that begins with the oxidation of insaturated fatty acids from triglycerides to originate peroxides. These compounds suffer a cascade of reactions that lead to cross linking bonds between fatty acids residues, transforming the oil in a solid film. Identification of the film oil is possible using the palmitic/stearic ratio (P/S) by chromatographic (GC) and/or spectroscopic techniques. Sterol composition, phytosterols or cholesterol, determined by GC-MS or FTIR techniques, allows investigators to distinguish between oil painting and a temper one that used egg as the binding medium.https://doi.org/10.14568/cp2_1OilsPaintingsDryingAgeingPeroxides |
| spellingShingle | Maria Eduarda Machado de Araújo Oils, paintings and chemistry Conservar Património Oils Paintings Drying Ageing Peroxides |
| title | Oils, paintings and chemistry |
| title_full | Oils, paintings and chemistry |
| title_fullStr | Oils, paintings and chemistry |
| title_full_unstemmed | Oils, paintings and chemistry |
| title_short | Oils, paintings and chemistry |
| title_sort | oils paintings and chemistry |
| topic | Oils Paintings Drying Ageing Peroxides |
| url | https://doi.org/10.14568/cp2_1 |
| work_keys_str_mv | AT mariaeduardamachadodearaujo oilspaintingsandchemistry |