The Influence of Raw Materials on the Stability of Grisaille Paint Layers
Source abstract
Abstract
Grisaille is a glass-based paint made by mixing metal oxides (iron or copper) with ground lead-silica glass. The different materials used in the grisailles production (coloring agents, base glasses, or vehicles) can significantly impact their long-term stability along with the firing conditions. The main objective of this study was to achieve a better understanding of how raw materials influence the production and stability of these paints. To achieve this goal, 27 grisailles were produced, changing the raw materials, proportions, and firing conditions. The produced grisailles were characterized by X-ray fluorescence and diffraction, colorimetry, roughness measurement, and contact angle analysis. Adhesion and cleaning tests were also made. The use of different coloring agents has a significant impact on the final appearance and on the chemical and mechanical stability of the grisailles, but the latest is more affected by both firing temperature and the proportion between pigments and base glasses.
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Research context
OpenAlex topics: Cultural Heritage Materials Analysis · Building materials and conservation · Pigment Synthesis and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Conservation and Restoration, NOVA School of Science and Technology, 2829-516 Caparica, Portugal
Research Unit VICARTE–Glass and Ceramics for the Arts, NOVA School of Science and Technology, 2829-516 Caparica, Portugal
CENIMAT|i3N, Department of Materials Science and CEMOP/UNINOVA, NOVA School of Science and Technology, 2829-516 Caparica, Portugal
Institute of Ceramic and Glass, Spanish National Research Council (ICV-CSIC), 28049 Madrid, Spain
Funding
Fundação para a Ciência e Tecnologia de Portugal
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