Investigation of the Korean Traditional Hobun Manufacturing Technique
NATIONAL RESEARCH INSTITUTE OF CULTURAL HERITAGE 2008 Investigation of the Korean Traditional Hobun Manufacturing Technique - Centering on Weathering Method - Kim Soon-Kwan Lee Han-Hyoung Kim Ho-Jeong Jeong Hye-Young <Abstract> Hobun(Oyster shell White) is a traditional material used as extender and white pigment from ancient times. The production method of it, however, has been discontinued. We have studied the traditional production method of Hobun by weathering oyster shell, which is one of the traditional ways for preparing Hobun. Reproduction study of manufacturing method of the discontinued traditional material is an important accomplishment of our research. Also this study provides solid background knowledge to stabilize the production and supply of Hobun for the cultural asset repairing materials. The result can be summarized as follows: The production process of Hobun by weathering method takes 5 steps - weathering shells washing pulverization separating fine powder by submerging in water drying. The major aim in step is to eliminate organic impurities. In the step, the fine particles smaller than 25 are separated by extracting the supernatant from stirred suspension after heavy particles are submerged. Also, the soluble inorganic impurities can be eliminated through the powder submerge in 15 times water and stirring the suspension 6 hours and changing the water 3 4 times. The final products have high quality with 94.03, 0.52, 2.05 for L, a, b, less than 25 particle size, fine resistance for discoloration by light and environmental pollution and good workability Key Words : Hobun, Oyster shell white, White pigment, Extenders, Reproducing research, Traditional technique, Weathering shells 200
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