I understand that the TYPE of charcoal used is very important in making BP. Good enough, being hard headed I had to try for myself and made some really piss poor BP using carbon. My question specifically applies to dark Al. Is the TYPE of charcoal that I add to the Al to retard the oxidization during the grinding / ball milling process critical? I have a supply of Carbon I would like to use up. Is it appropriate for Al grinding?
I have tried to research the sites archives, and can find no definitive answer. Likewise, what is the correct ration for Charcoal to Al during ball milling?