Re: Copper in bromoil bleach
Thanks Chris, I'll try a gardening store for cheaper copper sulfate, didn't know that! (I wonder if gardeners know alt-photo printmakers can use that stuff too ;) The prices of sulfate and chloride are about the same at the place where I buy them. But yeah, I could as well try chloride and see if it works... - Jalo ----- Original Message ----- From: "Christina Z. Anderson" <zphoto@montana.net> Date: Tuesday, April 15, 2008 18:55 Subject: Re: Copper in bromoil bleach To: alt-photo-process-l@usask.ca > Jalo, > No one has responded probably because no one knows, but from > experience, > copper chloride reacts a lot faster than copper sulfate in > mordancage. BUT > the tanning that occurs, which is so important in bromoil, is > from the > dichromate, not the copper sulfate--doesn't the copper sulfate > just bleach? > So I would try one print and see if it works and please let us know! > > Another thing--there sure is a price difference between the two > :) We can > get bags of the copper sulfate at gardening stores here. > > BTW I have been scanning lots of images of gums for some > Powerpoints I am > going to be showing at the Formulary when I teach this summer, > and I am > amazed at how close a bromoil looks to a gum in many of the > books--or, at > least, like the way they used to do gum back in the > 1900's. With the > bromoils I have done I could easily hang them with my gum prints > and the > public would probably not know the difference between a > monochrome black gum > and a monochrome black bromoil. The Impressionist Camera > is such a wealth > of imagery. > > I am also amazed at how photographic a bromoil can be (as well > as a gum > print). > > Chris > > > ----- Original Message ----- > From: "Projekti Vedos" <vedos@samk.fi> > To: <alt-photo-process-l@usask.ca> > Sent: Sunday, April 13, 2008 3:44 PM > Subject: Copper in bromoil bleach > > > Hi, > I was going to bleach some prints for bromoil but found out I'd > run out of > copper sulphate, but had plenty of copper chloride from doing > mordancage. > Can I substitute chloride for sulphate in bromoil bleach? > - Jalo > > > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > - - - - - > - - - - - > VEDOS - Alternative Processes in Photography and Printmaking > http://vedos.samk.fi > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > - - - - - > - - - - - > Satakunta University of Applied Sciences > School of Fine Art Kankaanpää > Paasikivenkatu 24, 38700 Kankaanpää, Finland > Tel: +358 2 620 6154 > Email: vedos@samk.fi > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > - - - - - > - - - - - > > > >
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