Re: Copper in bromoil bleach
hey guys, yall need to be careful about buying chemicals from garden stores, sometimes they contain stuff along with the chemical and are not chemically pure. the impurities may interfere with your process. peg
--
Peg Fredi
-------------- Original message from Projekti Vedos <vedos@samk.fi>: --------------
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 thi
ng--th
ere 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-proce
ss-l@u
sask.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
>
>
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