ABSTRACT

A new Pigmented Wax-Resin (PWR) formulation for infilling and reintegration of losses in paintings is introduced and tested for its suitability and stability. It consists of a mixture of Cosmoloid H80 microcrystalline wax and Regalrez 1126 hydrogenated hydrocarbon resin with dry pigments and/or fillers. Unlike other PWR formulations, including those sold by Gamblin Conservation Colors, it does not contain beeswax. Beeswax is reported to develop bloom and to corrode copper supports. The authors share methodologies and techniques used to characterize and assess the suitability of the new formulation in terms of its physical and optical properties, and to assess its stability to fluctuating relative humidity and temperature, particularly high temperatures. The new formulation was evaluated for its workability, opacity, and flexibility and for its compatibility with a selection of varnish coatings and inpainting media. Results showed that 1.5 parts of Cosmoloid H80 to 1 part of Regalrez 1126 (by weight), mixed with pigments and/or fillers, is a viable alternative to other infilling and inpainting media. It has good optical and working properties, a suitable degree of hardness, and remains stable during fluctuations in relative humidity and temperature, as well as to temperatures as high as 70°C.

摘要

引入了一种新的颜料蜡树脂 (PWR) 配方，用于填充和重新整合绘画中的损失，并测试了其适用性和稳定性。它由 Cosmoloid H80 微晶蜡和 Regalrez 1126 氢化烃树脂以及干颜料和/或填料的混合物组成。与其他 PWR 配方（包括 Gamblin Conservation Colors 出售的配方）不同，它不含蜂蜡。据报道，蜂蜡会起霜并腐蚀铜支架。作者分享了用于表征和评估新配方在物理和光学特性方面的适用性的方法和技术，并评估其对波动的相对湿度和温度（特别是高温）的稳定性。对新配方的可使用性、不透明度、灵活性以及与一系列清漆涂料和修补介质的兼容性。结果表明，1.5 份 Cosmoloid H80 与 1 份 Regalrez 1126（按重量计）与颜料和/或填料混合，是其他填充和修补介质的可行替代品。它具有良好的光学和工作性能、合适的硬度，并且在相对湿度和温度波动以及高达 70°C 的温度下保持稳定。