Metallographic Study of XIX Century Oklads Belonging to Russian Icons

摘要

Many icons from the XIX and XX centuries can be found on the territory of Romania, with oklads made of Cu, Ag or Cu alloys. This paper analyzes by means of optical and electronic microscopy the samples taken from two oklads belonging to Russian icons of the XIX century: one dated and the other undated but attributed to the XIX century by Florin Colonas - an expert in handicraft of artistic significance. Based on the pins on the surface of one of the oklad and the scientific literature, we tried to identify the manufacturer, the verification mark, with the date of manufacture, the Ag title mark, the mark with the city icon in which the oklad was made, and identifying the technique of realization. The chemical compositions of the oklads were determined by EDX and found to be made of Ag alloys of different chemical composition: the dated oklad is made of Ag-Cu alloy, while the undated one is made of Ag-Cu-Zn alloy.