고려청자와 중국청자 도편의 Color Spectrum 비교에 관한 연구

Abstract

The present study conducted a chromaticity analysis of 11 celadon shards from Longquan kiln sites in China and 7 celadon shards from Gangjin and 12 celadon shards from Buan in South Korea, respectively. The latter two were government kilns during the Goryeo Dynasty. Through a quantitative chemical component analysis, a comparative analysis of the ratio distribution of acidic oxides (RO2), amphoteric oxides (R2O3), and fluxes (RO+R2O) in the unglazed clay layer and the glaze layer was carried out on the basis of the UMF(Unity Molecular Formula) equation. In the glaze layer, the ratio of RO2 and R2O3 was higher for Chinese celadon than for Goryeo celadon, whereas in the unglazed clay layer, the scope of RO2 and RO + R2O was lower for Chinese celadon than for Goryeo celadon. The colors of celadon changed according to the ratio of coloring oxides (Fe2O3, TiO2). In both countries, the CIEa* values developed in inverse proportion, as negative values, whereas the CIEa* values for the ratio of TiO2 developed as positive values. According to the results of the CIEL *a*b* analysis of Goryeo celadon and Chinese celadon, Gangjin celadon developed a color spectrum in the dull GY group and had a narrow range of CIE b* values, while Buan celadon exhibited CIE a* values that were more in the plus range (+) than in the case of Gangjin celadon. Buan celadon also developed a color spectrum in the same dull GY group, but with smaller color differences. In comparison with Goryeo celadon, Chinese celadon had a broader distribution of color development. CH-2 had a CIE a* value of -8.56 and developed a color spectrum in the dull G group, while CH-5 had a CIE b* value of 14.05 and developed a color spectrum in the dull Y group. The color development of Chinese celadon sherds was distributed across the G group, GY group, and Y group.