Another question. Can you `overdo` amalgamation e.g. by using too much Mercury nitrate? I have tried to make amalgam, but it somehow disintegrated, the whole thing happened very fast well under 15minutes and most of my foil became `sludge`. Any tips on how to spot the right time and how to make the reaction slower? Sorry if this is something very obvious, but I still managed to get it wrong, even if I was watching for signs like bubbles etc.