copper prints was: Anyone doing autochrome?

[ryberg <cryberg@comcast.net>]

Chris wrote:
> (much deleated here) Then, this guy also did a copper sulfate print which 
> was really quite beautiful, reminiscent of Bernie Bertridge's cupric print 
> at APIS.  I think it might have been Obernetter's formula, or something he 
> devised himself. So that could be done in tandem with a cyanotype demo--a 
> pink print and a blue print.  And copper sulfate is cheap.  If you want, I 
> could email him and ask his formula.
> Chris
I would love to know Bernie's formula/method and any other copper method.
Charles  Portland OR