The Restoration Technology and Scientific Analysis of Bronze Mirror with Fine Linear Designs

Abstract

Bronze Mirror with fine linear designs in the bronze age shows the greatest alloy and casting skills of the day and presents the highest level of handcrafting and molding techniques. Lately, Lost-wax casting and sand-mould casting were used for the restoration of the national treasures of No. 141 and No. 143 Bronze Mirror with fine linear designs. Also the Principle Component Analysis, Microstructure Analysis, X-ray and SEM-EDS analysis were carried out on the restored Bronze Mirror with fine linear designs. Bronze Mirror that is made of sand-mould casting, hardly has a eutectoid and it is observed as a α dendrite. In contrast, Bronze Mirror that is made of lost-wax casting, the eutectoid has found through the α dendrite. As we compare lost-wax casting to the sand-mould casting through an analysis of restored Bronze Mirror, mostly, sand-mould casting has better castability and it seems that it brings a clear and equal Bronze Mirror as it has a low cooling rate. In this way, we are able to confirm that there is a big difference between the method by lost-wax casting and by sand-mould casting through an analysis of microstructure and restored Bronze Mirror. If such research will be continued, it will be an opportunity that investigates diverse methods of production techniques.

Three-Dimensional Digital-Mold Modeling and Sand-Printing for Replication of Bronze Mirror

“…In particular, it is essential to remove the surface corrosion and correct the shape deformation in order to reproduce the original appearance of the artifacts. This is the optimum method for ritual vessels used in ancestral rites and bronze mirrors that could be massproduced with molds (Yun and Cho, 2012;Yun et al, 2015).…”

A Study on Manufacturing Technique and Alloy Characteristics of Bronze Mirrors from Jeollanam-do Region in the Three Kingdoms Period

“…하거나, 한반도 출토 청 동거울에 대한 전체적인 연구사를 검토하는 연구 (Nam, 2014)가 이루어지고 있다. 자연과학 분야에서 한국 출토 청동거울에 대한 성분 분석과 미세조직에 대한 연구 (Hwang, 2011), 원산지 추정 연구 (Kang et al, 2003;Huh et al, 2007;Yu, 2009;Choi, 2014;Han et al, 2018)가 진행 된 바 있으며, 제작기술과 보존처리에 대한 연구 (Park and Yu, 2009;Yun and Cho, 2012), 매장환경에서 청동거울의 부식 특성을 연구 (Jang, 2020) (Choi, 1976;Bokcheon Museum, 2009) 1). (Park, 2004;Park and Yu, 2009;Choi, 2014;Han et al, 2018;Jang, 2020), 대체로 삼국시대 이후에 제작된 청동거 울들은 본 연구 결과와 유사한 미세조직을 보이고 있다.…”