Consolidation of contemporary paintings is a practice as complicated as delicate mainly due to the possibility of modifying the works' finishing. Conservators sometimes find limits facing these troubles because of the difficulty of applying adhesives with a paintbrush. The authors, in their attempt to give a practical and useful solution to this problem, have experimented in this work with different adhesives which are adequate for consolidation of contemporary paintings. They also have evaluated different application methods, and all of these tests were developed on poorly-bounded paintings. The study on combined methods of application was undertaken in order to compare the use of an ultrasonic atomizer with a low-pressure micro-table and an ultrasonic atomizer without a low-pressure micro-table. In this occasion, the study just wanted to analyze the deviation of colorimetric and gloss parameters for detecting if surfaces suffer aesthetic variations which may interfere with the works' concept. Conclusions finally show that it is possible to heavily consolidate poorly-bounded paintings by using an aqueous adhesive in a low concentration and an ultrasonic atomizer. The combination with a low-pressure micro-table will depend on the necessity of a punctual or general action of the adhesive. KeywordsContemporary paintings; Adhesives; Consolidation; New processes; Conservation. ResumoA consolidação de pinturas contemporâneas é uma prática tão complexa como delicada, principalmente devido à possibilidade de modificar as superfícies pictóricas. Os conservadores, encontram por vezes limitações suscitadas por este problema devido à dificuldade de aplicar adesivos com pincel. Os autores, numa tentativa de dar uma solução prática e útil a este problema, fizeram, neste trabalho, experiências com diferentes adesivos adequados à consolidação de pinturas contemporâneas. Avaliaram igualmente métodos de aplicação diferentes, tendo, todos os testes sido desenvolvidos em camadas pictóricas mal aglutinadas. O estudo com métodos de aplicação combinados foi empreendido para comparar o uso de atomizador ultra-sónico com baixa pressão e de atomizador ultra-sónico sem baixa pressão. Nesta ponto, o estudo apenas quis analisar o desvio de cor e dos parâmetros de brilho para detectar se as superfícies teriam sofrido variações estéticas que interferissem com o conceito das obras. As conclusões mostram que é possível consolidar fortemente camadas pictóricas mal aglutinadas utilizando um adesivo aquoso numa concentração baixa e um atomizador ultra-sónico. A combinação com baixa pressão dependerá da necessidade de uma acção pontual ou geral do adesivo.
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