Pintar la mar (1984) de Manuel Boix: evaluación de riesgos y viabilidad de la compleja eliminación del barniz envejecido
Abstract
This article focuses on the studies carried out in order to evaluate the risks and the feasibility of the complex cleaning intervention of Manuel Boix’s painting Pintar la mar. According to the artist, the aging of the alkyd varnish directly applied by compression on canvas and the drawing areas, impacted negatively on the chromatic perception of the painting due to the yellow-orange shade. Removing the yellow-orange shade layer without creating fabric rims and damaging the color areas was a challenging issue. In addition to conducting interviews and characterizing constituent materials using microscopic, spectroscopic and chromatographic techniques, it was necessary to develop a testing system with in vitro and in vivo tests. Among the evaluated systems, the use of physical-mechanical abrasive media, solvent surfactant gels, silicone solvent gels, as well as chemical nanogels, the latter two provided the best results. The estimation of risk and effectiveness of the tests took into account the morphological changes, color and gloss, as well as the efficacy of the varnish removal procedure, the color conservation and the presence of residues. Hence, an evaluation protocol was drawn up using different morphological (video-microscope and SEM) and spectroscopic (EDX and FTIR-ATR) techniques, colorimetry and specular brightness measurement.
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