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Artifact ID BC 0713/0893A
Class BANGLE
Material copper-base
Site Ban Chiang BC
Period Early Period-Middle Period

Provenience Status/Description Metallography Elemental/Hardness
Alloy: bronze or copper
Where Cut: cross section of shaft
How Mounted: cross-section mounted cut side up
Structure: post-casting treatment
Metallographic description: At 100x, the structure is of highly corroded cored dendrites. Blue-gray inclusions are concentrated in the interdendritic zones and in the shrinkage and corrosion voids. Twinned redeposited copper can be seen in some voids. At 600x, the metal becomes a mosaic of tiny grains filled with strain lines and twins. Some of the twins are bent. Grain size varies and working is more evident near the edges.