Verify out these china metal stamping photos:
Workplace Desk
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My desk at perform (looking tidier than normal, with less papers strewn everywhere).
Inspired by this MetaFilter thread.
Sign: Copper & Bronze Alloy Smithing
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"Besides copper, 4 sorts of copper alloys have been discovered at Sanxingdui: tin-copper, lead-copper, tin-lead copper and lead-tin copper. Most of the bronzes were created of the ternary alloy of lead-tin-copper. They were cast with clay section models in 1 or numerous pours of metal. Casting-on was practiced extensively other complicated tactics such as pre-casting, rivet-casting, and embedded casting were also employed.
Most of the gold artifacts were made of the binary alloy of gold and silver. The content of gold generally exceeds 85%. Foundry and metal-smithing technology incorporated panning, smelting, chasing, hammering and stamping.
Copper mines have been abundant in the ancient territory of Shu, mostly distributed along the Jinsha river and Qinyi river valleys as properly as locations bordering the Chengdu plain. Those mines provided ample supplies for the regional bronze business. Several human-like heads of bronze still retain clay cores on the inside, and pottery vessels probably employed as crucibles have been unearthed at the website. This proof indicates the existence of a huge-scale bronze industry at Sanxingdui.
The spectacular assembly of bronze sculptures at Sanxingdui, distinguished for their complex technology, distinctive visual vocabulary and grand look, embodies the highest technological achievement of ancient China in the Shang dynasty period. These finds warrant a significant chapter in the globe history of bronze production".