Notice catalographique « The alteration of different types of mercuric sulphide pigments under light »
- Titre
- The alteration of different types of mercuric sulphide pigments under light
- Auteur ou éditeur
- Perron, Emmanuelle Alexandra
- Queen's University (Kingston, Ont.)
- Lieu de publication
- Kingston, ON
- Maison d'édition
- Queen's University (Kingston, Ont.)
- Date de publication
- 2011
- Collation
- vi, 62 p. :ill. (some col.) ; 29 cm.
- Résumé
- The use of natural cinnabar or mercuric sulphide as a pigment can be traced back to prehistory and such use spread from China to Europe until the development of the artificial dry-processed vermillion in the 8th century and the "modern" wet-processed vermillion in the 17th century. Nevertheless, the use of all three types of mercuric sulphide pigments in easel and wall paintings has resulted in uneven darkening. The presence of light, particularly in the wavelengths of 400-570nm, and the presence of various impurities, especially chlorine, have been identified as the main cuases of the darkening of these pigments. This research compares the colorimetric alterations of five samples of red mercuric sulphide pigments from various suppliers when exposed to: 1) different sources of lighting, 2) the application of a varnish layer adn 3) the spraying of water and diluted sodium chloride solution. Based on past research, the pigments were expected to have an uneven colour deterioration corresponding to areas of greater amounts of impurities. The paint samples were exposed to the Q-sun Xenon-Arc instrument, and fluorescent lamps. The colorimetric alterations were recorded with a Minolta colorimeter using the CIELAB L*a*b* System. Another set of samples were tested with the Micro-fade tester the Getty Spectroviewer software. In addition to this, the composition of the pigments was analyzed with the use of fluorescence microscopy, x-ray fluorescence (XRF) adn x-ray powder diffraction (XRD). Results showed a remarkably even colorimetric alteration for all the mercuric sulphide smaples under all light exposure except for the Kama Pigments' vermillion, a pigment which was found to contain large amounts of selenium and cadmium but, no mercuric sulphide according to the XRD analysis. Also, the application of a varnish layer as well as the exposure to sodium chlorine did not produce significant variations in results.
- Langue
- English = Anglais
- Sujet
- Pigments - Analysis
- Pigments - Testing
- Pigments - Analyse
- Pays
- Canada
- Type de document
- Monograph = Monographie
- Localisation
- TP 936.5 P47 2011
- Clé
- 16810
- Collection
- Catalogue