Eric Neilsen (e.neilsen@worldnet.att.net)
Sun, 23 May 1999 20:42:58 -0500
Witho, I would recommend that you try the ammonium based platinum salt if you
have not. I will work with either traditional ferric oxalate or the ammonium
based ferric oxalate. It is mixed at 5g with distilled water t make 25ml. It
will not require heating to keep in solution like the potassium based platinum
salt. And strictly speaking, an all platinum print would not be a Zia, but just
a platinum print utilizing the ammonium ferric. (Unless of course Richard has
changed his definition of Zia prints or the Zia system.) You may also wish to
print humidity of 55% instead of a high humidity, while this will give you
slightly warmer colors, yo will gain quite abit of speed. You may also
consider adjusting the pH of your ferric, downward with a little Oxalic acid.
EJ Neilsen
Witho Worms & Jorien van Santen wrote:
> To Jeffrey Matthias,
>
> Last week I tried your formula for lithiumpalladiumchloride (7.92 / 16.59
> in 100 ml of water) I had good results with better blacks, though I made
> only one test. I missed a lot of mail last weak. Are there changes in
> quantities of the different compounds or are they still the same after
> having done more research.
>
> for others also,
>
> What compounds and what formula's do I need to make pure platinum prints in
> D.O.P and P.O.P. (Zia). Bij using D.O.P. with ferricoxalate and platinum
> only, I can get some very romantic and grainy images from very thin
> negatives. There must be other possibilities, I guess.
>
> Witho
-- Eric J. Neilsen 4101 Commerce Street, Suite #9 Dallas, TX 75226 214-827-8301 http://home.att.net/~e.neilsen
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