Re: Carbon Color

From: Judy Seigel ^lt;jseigel@panix.com>
Date: 03/30/04-05:05:02 PM Z
Message-id: <Pine.NEB.4.58.0403301758430.2958@panix2.panix.com>

On Tue, 30 Mar 2004, Loris Medici wrote:
>
> P.S. I see some very nice brown - blue split toned
> cyanotypes in alternativephotography.com site; anybody
> with a "bulletproof" method for achieving this? (is
> the solution bleaching in sodium carbonate?)
>

My students did great split toning cyano with 2 baths, first in the bleach
(sodium carb or ammonia) then in the tannic acid, and sometimes again in
one or both. There are 2 tricks, which you find for your own combo by
testing -- first, only bleach part way to start, so there's some blue left
to turn purple. Then, JUST until the split happens in the tannic. As I
recall, rinsing between the baths is also important because it keeps down
the contamination. It also helps to time the baths. (Post-Factory #5 has a
section on cyano toning, including the split).

Judy
Received on Tue Mar 30 17:05:19 2004

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