Blue enamel pigment—Chemical and morphological characterization of its corrosion process
Source abstract
Abstract
Abstract The present paper studies the corrosion mechanisms of blue enamel powder samples, immersed in water, reproduced according to historic recipes from an 18th-century manuscript. The pH increase of the electrolyte reveals an ionic exchange between the alkaline ions of the glass and the hydrogen-bearing ions of the water. With the lixiviation of the alkaline components, cobalt is influenced by other neighbouring ions, leading to a change of enamel colour. In two high-lead samples, hydrated lead white and Co2+/Co3+ spinels were identified, which explains their complete colour fade. The influence of Pb2+ ions may increase in detriment of the Co2+ ions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Cultural Heritage Materials Analysis · Conservation Techniques and Studies · Pigment Synthesis and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
Show source-provided references
1. Caen · 2009
2. Enamels in stained glass windows: preparation, chemical composition, microstructure and causes of deterioration10.1016/j.sab.2009.06.005 ↗
3. Swiss stained-glass panels: an analytical study10.1017/S1431927617000629 ↗
4. De l’origine du cobalt dans les verres10.3406/arsci.1992.895 ↗
5. De l’origine du cobalt: du verre à la céramique10.3406/arsci.1996.939 ↗
6. Art de la verrerie
7. Beckmann · 1846
8. Aux origines des bleus de cobalt: Les débuts de la fabrication du saffre et du smalt en Europe Occidentale, Comptes Rendus Des Seances La Acad
9. Chemistry at the Royal Society of London in the eighteenth century—III(B)—metals10.1080/00033796500200111 ↗
10. 1864
11. A study of smalt and its conservation problems in two sixteenth-century wall paintings in Rome10.1179/sic.2006.51.1.29 ↗
12. Imaging microspectroscopic, secondary ion mass spectrometric and electron microscopic studies on discoloured and partially discoloured smalt in cross- sections of 16th century paintings10.2533/chimia.2001.952 ↗
13. Das De Mayerne-Manuskript: die Rezepte der Werkstoffe, Maltechniken and Gemälderestaurierung
14. Vibrational spectroscopy correlated with elemental analysis for the investigation of smalt pigment and its alteration in paintings10.1039/c3ay40906f ↗
15. Investigation of the discoloration of smalt pigment in historic paintings by micro-X-ray absorption spectroscopy at the Co K-edge10.1021/ac200184f ↗
16. Discoloration of the smalt pigment: experimental studies and ab initio calculations10.1039/c2ja30132f ↗
17. Cobalt blue–reproduction and characterisation of blue enamel recipes from The Handmaid to The Arts by Robert Dossie10.13036/17533546.57.4.027 ↗
18. Brady · 1989
19. Holbach · 1752
20. Ion beam and infrared analysis of medieval stained glass10.1007/s00339-004-2538-9 ↗
21. Geochemical approach to glass dissolution
22. Downs · 2017
23. Effect of calcination temperature on the porous structure of cobalt oxide micro-flowers10.1039/C1CE05943B ↗
24. Blue CoAl2O4 particles prepared by the sol−gel and citrate−gel methods10.1021/cm001061z ↗
25. Mwenesongole · 2008
26. The effect of Mn, Fe and Cu ions on potash-glass corrosion10.1016/j.jnoncrysol.2009.05.051 ↗
27. Characterization of potash-glass corrosion in aqueous solution by ion beam and IR spectroscopy10.1016/j.jnoncrysol.2006.08.032 ↗
28. Reactions between water and lead crystal glass (24% PbO)
29. Cobalt absorption bands for the differentiation of historical Na and Ca/K rich glass10.1002/sia.3810 ↗
30. Modern white pigments: their identification by means of noninvasive ultraviolet, visible, and infrared fiber optic reflectance spectroscopy
31. Gadsden · 1975
32. Derrick · 1999
33. XRD characterization of cobalt-based historical pigments and glazes