Non-traditional gilding revisited: evaluation of gilded surfaces exposed to uncontrolled diurnal fluctuations for over 10 years
2017
Options for loss compensation in water-gilded objects are limited by a constrained number of materials and techniques suitable to imitate distinctive appearance of gilding and a conservators’ individual preference for traditional or non-traditional methods. Evidence-based assessments of selected conservation materials indicated that the synthetic materials, acrylic dispersion Plextol B500, acrylic resin Paraloid B-72, and polyvinyl acetate resin AYAF, are potentially the most useful for compensation of losses in matte water-gilded objects. This prompted a series of experiments involving the testing of ageing characteristics of three synthetic polymers used in gilding, in comparison to those used in traditional gilding. A frame sample, which was gilded using both traditional and non-traditional techniques, was exposed to diurnal fluctuation in relative humidity (RH) and temperature through window glass without ultraviolet filtering for over 10 years. Subsequent examination of the gilded surfaces suggested ...
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