Clarification of some phenomena concerning degradation of Japanese painting paper by copper containing pigments and development of new control method

研究了含铜颜料对日本纸降解的影响。首先，观察到的是江户时代晚期的手工彩色木刻版画.为了阐明降解机制，将涂有孔雀石粉的现代日本纸在80 ℃，65%RH的环境中老化。结果，Cu物质从纸张的右侧扩散到错误的一侧。其次，研究了螯合剂对日本纸（衬纸）降解的影响。将用螯合剂（乙二胺四乙酸：EDTA、二亚乙基三胺五乙酸：DTPA或羟基亚乙基二膦酸：HEDP）和/或碳酸钙（CaCO3）处理的衬里kozo纸粘贴到涂有粉末孔雀石的绘画gampi纸上。在80 ℃和65%rh的强制空气循环烘箱中老化样本。EDTA与CaCO3共同处理的加衬古生纸能有效地减少Cu离子引起的酸化、变色和解聚。DTPA的效果优于其他药物。

The effects of Cu-containing pigments on degradation of Japanese paper have been investigated. In the first place, a hand- coloured wood- block print of the late Edo era is observed. To clarify the degradation mechanism, sheets of modern Japanese paper painted with powdered malachite are aged in an environment of 80℃, 65%RH. As a result, the Cu species diffuse from the right to the wrong side of the paper. In the second place, the effects of chelating agents on the degradation of Japanese paper (lining paper) have been investigated. The lining kozo paper treated with chelating agents (Ethylene diamine tetraacetic acid : EDTA, Diethylene triamine pentaacetic acid : DTPA or Hydroxyethylidene diphosphonic acid : HEDP) and / or calcium carbonate (CaCO3) was pasted to the painting gampi paper coated with powdered malachite. Specimens were aged in a forced air circulation oven at 80℃ and 65%rh. The lining kozo paper treated with EDTA together with CaCO3 were effective in reducing the acidification, discolouration and depolymerization by Cu ions. The effect of DTPA was better than the others.