Blow Pipe

A blow pipe is a simple devise consisting of a simple to complex tube. Air is forced through the tube by means of the lungs to forcefully add oxygen to a flame, increasing it's heat. The flame could be produced by a simple oil lamp or gas fed flame. This simple technique of rapid oxygenation can produce temperatures high enough to melt small amounts of gold, alloys and solders.

The first evidence of the use of a mouth blow pipe for alloying gold with silver and casting was in Ecuador and Peru circa 200 BC. This simple and successful technique is still used today.

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