Vivianite, a blue pigment employed in the past practically only in Northern and Central Europe, but with very limited use, was identified in an early sixteenth century painting, stylistically with Flemish features, from a church in Portugal. The identification of this iron phosphate mineral was made by SEM-EDS based on the atomic ratio between phosphorus and iron in layers of blue paint (area analysis) and in particles of these same layers (spot analysis). This painting, about which there is no document to prove its authorship, becomes the first case, known in detail, of a sixteenth century painting containing vivianite. Moreover, this find and the presence of a chalk ground, also identified, strongly support the hypothesis of being a Flemish painting.
The theatre of ethics and memory: intervention problems in the "Triptych of Life of Christ", belonging to the church of Saint John, the Baptist, Tomar, attributed to the workshop of Quentin Metsys
ResumoO "Tríptico da Vida de Cristo", da Igreja de São João Baptista, em Tomar, data do início do século XVI e é atribuído ao entorno de Quentin Metsys. Quando foi iniciada a intervenção de conservação e restauro actualmente em curso, apresentava extensas reintegrações, em parte significativamente alteradas, que colocavam diversas questões éticas. Que fazer com essas reintegrações era o problema principal, para o qual não era evidente a solução a adoptar. Deviam ser assumidas como parte da história do tríptico e ser mantidas, não obstante a alteração? Ou deviam ser removidas? Todas ou apenas algumas? Enfim, como respeitar a autenticidade, a memória e a ética profissional? Eis o que se pretende discutir neste artigo.
Abstract
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