Solution to Porous Cracked Gold

Описание к видео Solution to Porous Cracked Gold

How to work gold when it is porous and cracking?
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The porous cracked placer gold issue is solved by melting the gold bar at high heat several times.
Then eventually cutting the gold bar into smaller sections and melt again, so that the heat gets to the impurities more evenly.
I used a large amount of potassium nitrate, which reacts with base metals, effectively removing them from the melt.
Stirring with a carbon rod also draws the impurities out.

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