A study on identification of paint media using staining tests on cross-sections

染色测试技术用于分析油漆介质的横截面上已经进行了参考新样品和旧样品的艺术品。中性酰胺黑试剂（AB3）和酸性品红，这是蛋白质染色剂，已被证明可以识别新样品和旧样品中的胶介质。另一方面，苏丹黑B和油红O，这是油的染色剂，显示出识别干燥的油介质在新的样品，但不识别油介质在老化的石油地面样品从18和19世纪的艺术品。而苏丹黑B则常粘附新老胶底，易造成蛋白质误为干性油。本研究以国立博物馆西洋美术馆馆藏的多件作品为研究对象，探讨其颜料与媒材的使用。

The staining test technique used in the analysis of paint media on cross-sections has been carried out on reference new samples and old samples from artworks. Neutral Amide black reagent(AB3) and acid Fuchsine, which are stains for proteins, have been shown to identify glue media both in new and old samples. On the other hand, Sudan black B and Oil red O, which are stains for oils, revealed to identify drying oil media in new samples, but not to identify oil media in aged oil ground samples from artworks of 18th and 19th century. As to Sudan black B, it often adhered new and old glue grounds, thus it might cause to misunderstand proteins for drying oils. Pigments and media used in many artworks in the National Museum Western Art have been surveyed in this study.