Colour Change Caused by Dry Cleaning Process on Painted Surfaces

Silvia García Fernández-Villa, J. M. D. L. Roja, M. S. A. Moya
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引用次数: 1

Abstract

Over the last few years, the dry cleaning process has become an excellent alternative to solvent or water-based mixtures, which prevents diffusing the dirt into the painting structure during the cleaning process. The use of this kind of cleaning is especially effective on contemporary paintings as it prevents the solubilisation of additives such as the surfactants contained in polymeric dispersions (e.g. in acrylic and PVAc-based paints). In addition to some reported side effects that could be caused by dry cleaning processes on paintings (such as changes in the integrity of the paint or any residual materials which may be left behind) one parameter that should be tested is the colorimetric change seen on treated surfaces. In some cases, the use of certain dry cleaning materials can cause burnishing or roughening of the painted surface. This effect results in a change in brightness and chroma and subsequently to a change in the colour of the treated area, especially on dark shades. This article evaluates the colorimetric change of different kinds of painted surfaces caused by the dry cleaning process, such as gouache, commercial formulated acrylic, fish glue tempera, casein tempera, PVAc and primal acrylic paint. The cleaning materials tested include different kinds of sponge cloths, malleable materials and erasers used in the field of heritage conservation/restoration. The change in colour is measured by means of a spectrophotometer and the chromatic values are processed in a spreadsheet. The colorimetric changes have been calculated using the advanced equation recommended by CIEDE2000 and the chromatic values obtained have been studied following the standard recommendations.
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油漆表面干洗过程引起的颜色变化
在过去的几年里,干洗工艺已经成为溶剂或水基混合物的一个很好的替代品,它可以防止在清洗过程中污垢扩散到油漆结构中。这种清洗方法对当代绘画尤其有效,因为它可以防止聚合物分散体(如丙烯酸和聚氯乙烯基涂料)中含有的表面活性剂等添加剂的溶解作用。除了一些报道的可能由油漆干洗过程引起的副作用(例如油漆完整性的变化或可能留下的任何残留材料)之外,应该测试的一个参数是在处理过的表面上看到的比色变化。在某些情况下,使用某些干洗材料会导致涂漆表面抛光或变粗糙。这种效果导致亮度和色度的变化,随后导致处理区域的颜色变化,特别是深色。本文评价了水粉、市售配方丙烯酸、鱼胶蛋彩漆、酪蛋白蛋彩漆、聚氯乙烯和原丙烯酸漆等不同油漆表面在干洗过程中所引起的比色变化。测试的清洁材料包括不同种类的海绵布、可延展材料和用于文物保护/修复领域的橡皮擦。用分光光度计测量颜色的变化,并在电子表格中处理颜色值。使用CIEDE2000推荐的高级公式计算了比色变化,并根据标准建议研究了得到的色值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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