Pure copper work hardens pretty fast, so hardness is not an indicator of purity. Just bend that soft tubing a few times and you'll see. It was annealed so you 'could' bend it.
ode At 12:07 PM 10/24/2003 -0400, you wrote: >Also I believe the soft copper pipe is pretty pure copper. Not the had kind, but >the kind that is easy to bend. > >One should be able to buy a few feet of large diameter tubing (3/4" will produce >about a 2 3/8" wide sheet), cut it to length, and cut it lengthwise. Then open >it up to make a sheet out of it. > >Marshall > >Al Davis wrote: > >> Electrical copper wire is 99.95% minimum purity. Cheap, too. >> >> Do a search for 99.95% copper and you'll get lots of references. >> >> Al Davis >> >> > I keep trying to think of something that's made out of pure copper and I'm >> > just not getting there. >> >> -- >> The silver-list is a moderated forum for discussion of colloidal silver. >> >> Instructions for unsubscribing may be found at: http://silverlist.org >> >> To post, address your message to: [email protected] >> >> Silver-list archive: http://escribe.com/health/thesilverlist/index.html >> >> List maintainer: Mike Devour <[email protected]> > >
