金屬活字의 靑土를 이용한 蜜蠟鑄造法 實驗 硏究

Abstract

This study investigated the specific processes and principles of metal type wax casting method using celadon clay. (1) Matrix material: Beeswax and injection wax were useful as the material. (2) The mould material and type performance: Celadon clay was useful as the filling material. Activated carbon, paper fiber and graphite were useful as the functional material. Each of the mixture proportion was 10～19% for activated carbon, 1% for paper fiber, and 20% for graphite. In particular, paper fiber played a superior, almost critical role in preventing cracks in the mould. Activated carbon demonstrated high success rate. However, the quality of type was found to be poor for all. 20% for oil carbon was not appropriate. (3) Metal components, pouring quantity, and pouring method: Bronze was more effective than brass as the metal component. A small quantity of approximately 350 grams was poured using conventional method. (4) The number of character strokes: The fewer the number of character strokes, the higher the success rate was. (5) Direction of character face and pouring method of metal fluid: The success rate was highest, when the character face was directed downward, and it was slightly higher when metal fluid was poured in a standing mode. (6) The main path caliber for metal fluid: The size of 4.5 × 5.0mm was sufficient. (7) The temperature of mould: The degree of 600℃ was sufficient as the burning temperature for mould. The success rate was not affected by the mould temperature at the time of metal fluid pouring. (8) The casting success and contraction rate: The highest success rate 90.0%, and the overall success rate was 15.74%. Contraction rate was 3.66%. (9) The characteristics of type strokes: All the distinctive characteristics in Jikji were observed here. Therefore, it appears that the wax casting method adopted by this experiment was the replication of the method actually used to cast Jikji type.