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Re: Gallic acid; Was:

Thanks for the info! It sounds like it would be fun to try, as we have a lot of walnut trees around here as well as the oaks. I assume it toned the print dark brown/black (?). Did the whites stay bright? I would have thought it would stain the whole paper...


On Aug 23, 2008, at 10:34 AM, Christina Z. Anderson wrote:

Hi Linda,
I did not use oak per se but I used walnut husks and boiled a cup or two of them in a bunch of water for a while and used the water as the toning bath.  I got my walnut husks from a basket maker.  The method is very loose because in basket lore, a basket maker would just have an old barrel filled with rain water and toss the walnuts in that and then use it for dyeing.  It is very archival.  I have NOT done this with cyanotype but with gelatin silver prints so I cannot guarantee it will directly apply to your situation.
I have toned with gallic, though, that I bought from Artcraftchemicals.com
Hope this helps,
Christina Z. Anderson
----- Original Message -----
Sent: Saturday, August 23, 2008 11:12 AM
Subject: Re:Gallic acid; Was:

Speaking of toning cyanotypes, I recently gave a cyanotype workshop for my book arts group, and we did some toning with tannic acid, using tea. I mentioned that gallic acid was also sometimes used but I'd never tried it. Well, someone from the group just gave me two bags (!) of oak galls. Does anyone know how to extract gallic acid from oak galls-- or even if it's possible?


On Aug 22, 2008, at 5:08 PM, Robert W. Schramm wrote:

BTW cyanotype can be toned to achieve colors other that blue and white.

Good luck with your work and welcome to alternative process printing.

Bob Schramm