This network imported tin and charcoal to Cyprus, where copper was mined and alloyed with the tin to produce bronze.

Inhabitants of the ancient Indus river valley, the Harappans, developed new techniques in metallurgy and produced copper, bronze, lead and tin.

Reverberatory and crucible furnaces are common for producing aluminium, bronze, and brass castings.

However it could be alloyed with lead and copper to make pewter or alloyed with copper alone to produce bronze.

Industry too, since they were the first to produce bronze and then iron.

One alloy was developed as an early attempt at producing corrosion-resistant bronze, and was described as "hard, tough, and sonorous."

This has been attributed to the lack of a local source of tin, which when combined with copper produces bronze.

Inhabitants of the ancient Indus river valley developed new techniques in metallurgy and handicraft (carneol products, seal carving) and produced copper, bronze, lead, and tin.

Harappans evolved some new techniques in metallurgy and produced copper, bronze, lead, and tin.