传统古旧字画的装裱修复中,污斑清洗是最重要的一道工序。本文选用常见的4种去污材料,对宣纸上的墨水污斑进行去除,通过测试色差、pH值和纸张厚度,表征了各种材料的去污效果,结果表明,KMnO4-H2C2O4联合应用去除墨水污斑效果最好,去除速度快,而且对纸张厚度无影响。 Traditional ancient calligraphy and painting of the mounting repair, stain cleaning is the most important process. In this paper, four kinds of common decontamination materials were selected to remove the ink stains on rice paper, and the decontamination effects of various materials were characterized by testing the color difference, pH value and paper thickness. The results showed that the combination of KMnO4-H2C2O4 The best stain, removal speed, and no effect on the thickness of the paper.