Final product at least 95% pure. It took years of salvaging developing solutions from X-rays, photos, newspapers, camera shops, etc. to get that much. It looks like black powder until it is melted into solid chunks.
Don't try this at home, or at least indoors:
Once consolidated from all sources by dissolving in nitric acid, the solution was boiled and evaporated into a crude nitrate slug. The slug was fired in an air-blown wood oven in a loosely closed ceramic vessel. The nitrate decomposed by evolution of toxic, corrosive nitric oxide gases (NO2 + N2O5) with a characteristic red-brown color. Gases escaped a safe distance away from human activity. Black metallic powdered silver remains in the ceramicvessel. If melted with a welding torch, it is bright, pure silver! It took a couple of days.
Very cool. How pure was the silver ? How long did process take ? @qiyi
Final product at least 95% pure. It took years of salvaging developing solutions from X-rays, photos, newspapers, camera shops, etc. to get that much. It looks like black powder until it is melted into solid chunks.
That's incredible. Nice work!
Don't try this at home, or at least indoors:
Once consolidated from all sources by dissolving in nitric acid, the solution was boiled and evaporated into a crude nitrate slug. The slug was fired in an air-blown wood oven in a loosely closed ceramic vessel. The nitrate decomposed by evolution of toxic, corrosive nitric oxide gases (NO2 + N2O5) with a characteristic red-brown color. Gases escaped a safe distance away from human activity. Black metallic powdered silver remains in the ceramicvessel. If melted with a welding torch, it is bright, pure silver! It took a couple of days.
Certainly some science involved there. Very interesting