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Precious Metal Refining & Recovery, Episode 9: DIY Nitric Acid
Precious Metal Refining & Recovery, Episode 5: Recovering gold from RAM
Precious Metal Refining & Recovery, Episode 11: Silver From Bang Snaps
Precious Metal Refining & Recovery, Episode 12: Gold From Computer Ash
Precious Metal Refining & Recovery, Episode 13: Platinum From Spark Plugs
Precious Metal Refining & Recovery, Episode 0: What We Will Be Doing
Precious Metal Refining & Recovery, Episode 7: Fining Silver
poorman's nitric acid
Nitric acid salt = gold (English subtitles)
Yet again Nitric acid and precipitating Copper
Easy DIY Gold & Silver Refining Process At Home, No Acids. Remove Base Metals By Cupelling MBMM
Making nitric acid for gold and silver refining.
