Effects of Color Pigments on the Hanji Deterioration

Abstract

ABSTRACT This study was carried out to analyze deterioration ch aracteristics of color-pigm ents painted Hanji to pre-serve and restore the cultural properties. On the tradi tional painting technique, glue was used with pig-ments in various ways for painting, but it eventually caused the deterioration of paintings. Thus, five col-ors were selected and analyzed for this study for inve stigating their characteristics of deteriration. Three kinds of glues (Wugyo, Nokgyo, and Togyo) and two kinds of pigments (Chinese and Gilsang) were painted on the Hanji for the accelerated aging test. And then color fastness of pigments and tensile strength of painted Hanji were measured for the estimation of deterioration degree. The results of SEM-EDS showed that Chinese pigments including blue, yellow, green, and red were composed of in-organic substances but the brown was organic substance. Gilsang pigments were composed mainly of Si and Ti ions. Color fastness of the Gilsang pigment blue, yellow, green, and brown were better than those of Chinese. Chinese pigment brown with organic substance showed the worst color fastness. Generally, Chinese pigments painted Hanji showed higher tensile strength than Gilsang in the accel-erated aging test. Hanji treated with Chinese pigment and Nokgyo (antler glue) blends and Gilsang pig-ment and Togyo (rabbit pelt glue) blends showed higher tensile strength than the others. And Andong Hanji showed the highest tensile strength.