|Helena Pinheiro de Melo, Jana Sanyova, António João Cruz, "An unusual glazing technique on a Portuguese panel painting from the second half of the 16th century: materials, technique and reconstructions", in Janet Bridgland (ed.), Preprints of the ICOM-CC 16th Triennial Conference, Lisbon, ICOM, 2011, ISBN 9789899752221, paper 0105
|A regular dotted pattern, suggesting the imprint of a cloth, was found on the red glazes of three panel paintings from the second half of the 16th century, attributed to the Portuguese painter Francisco Joao (active 1562.1595). The materials and stratigraphy of the red glazes were analysed in one of these paintings using OM, micro-FTIR, SEM-EDX and HPLC. The original glazes were prepared with cochineal and madder lakes bound in an oil-based medium. Based on that information and on research on historical treatises of the period, reconstructions were made using a cochineal lake and different oil-based binding media to which resins, driers and fillers were added. Different formulations gave similar results to the original imprint, reflecting the diversity of approaches to the glazing technique found in historical sources.
|Academia | Researchgate
|RIS | Endnote