Characterization by chemical analysis of portuguese baroque polychrome wooden sculptures with erudite and popular features [Caracteriza??o através de análise química da escultura portuguesa sobre madeira de produ??o erudita e de produ??o popular da época barroca]

摘要

Making use of several analytical techniques, four erudite and four popular Portuguese baroque wooden sculptures were studied. The materials and techniques employed were identifed and the relationship between their artistic quality and the materials used was investigated. In general, the pigments were common at the time, but one pigment discovered in the beginning of the ~(18)th century and two rare arsenic pigments were also identifed. In popular sculptures cost-saving was detected, particularly concerning the gold leaf. Regarding some technical procedures identifed, recommendations found in historical documents did not seem to have been entirely followed, neither in erudite nor in popular sculptures.