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http://dx.doi.org/10.12654/JCS.2020.36.2.06

Experimental Research of Lost-wax Casting: Gilt-Bronze Pensive Bodhisattva  

Yun, Yong-Hyun (Scientific Heritage Conservation Division, National Science Museum)
Cho, Nam-Chul (Department of Cultural Heritage Conservation Science, Kongju National University)
Doh, Jung-Mann (Interface Control Research Center, Institute of Science and Technology)
Publication Information
Journal of Conservation Science / v.36, no.2, 2020 , pp. 123-142 More about this Journal
Abstract
We attempted an experimental study of lost-wax casting to reconstruct the Gilt-bronze pensive Bodhisattva; The main object we aimed to reconstruct was the Korean national treasure No.83, Gilt-bronze pensive Bodhisattva(Maitreya); thus, we scientifically analyzed and measured the alloy ratio and casting method. Initially, the alloy ratio we used during the preliminary experiment was Cu:Sn:Pb = 95.5:4.0:0.5; we then increased tin and lead by 2.5% to consider vaporization during the main experiment. After applying lost-wax casting, we realized that 30% rosin contributed to proper hardness after the wax hardness experiment. The microstructure revealed normal casting character(α-Cu, δ), and the results of the chemical analysis are identical to those of previous studies. The analysis of the mold suggests the presence of quartz powder for structural stability and fire-resistance along with other organic materials whose contribution is still unknown. We expect that our research will serve to provide basic data for advanced studies in the future.
Keywords
Gilt-bronze pensive Bodhisattva (Maitreya); Lost-wax casting; Experimental research; Microstructure; Component analysis;
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