Restauração e conservação: algumas questões para os conservadores. A perspectiva da conservação de têxteis

O texto discute as idéias e diferentes conotações que os conceitos de conservação e restauração trazem em diferentes idiomas e culturas e as possíveis mudanças conceituais ocorridas nos últimos anos. São discutidas as diferenças de abordagem, procedimentos e objetivos que as duas atividades apresentam, sempre do ponto de vista da conservação de têxteis. Vários exemplos de abordagens distintas, desenvolvidas em função dos tratamentos de têxteis de diferentes naturezas são discutidos em detalhe

Analytical methods for the characterization of organic dyes in artworks and in historical textiles

Dyes are among the most significant components in works of art and archaeological findings. In the scientific examination of historical artefacts, the identification of natural dyestuffs is a challenging task, due to the complexity of their chemical composition and the possible presence of mixtures of chromophores and degradation products. For this reason, in the last few decades, new analytical procedures and techniques have been developed and improved for the characterisation of organic dyes and their identification in micro samples. This review looks at the chemical composition of natural organic dyeing materials used in the field of the Cultural Heritage and focuses on several analytical methods based on spectrometric and chromatographic techniques which have contributed to the study of organic dyes in works of art and archaeological findings