From: Carl Weese (cweese@earthlink.net)
Date: 05/02/00-03:51:01 PM Z
Darlington Media Group wrote:
>
> Dear Eric,
>
> I have a copy of "A Contemporary Method for Making Photographic Prints in
> Platinum and Palladium" by Pradip Malde & Mike Ware (1986) in front of me
> now.....
>
> Page 23 .... "If you do not want to be bothered with the control of
> humidity, then the most consistent results can be obtained by mixing the
> platinum and palladium solutions in the ratio of 3:1 respectively. This
> sensitiser has a contrast and speed that are fairly constant over wide
> variations in humidity and it yields a long range of well graduated and
> neutral tones".
>
That's interesting--does it say just what procedure to use if one
doesn't want to bother with tight control? It's possible that this 3:1
Pt/Pd in ammonium salt form offers a wide "sweet spot" for humidity
similar to LiPd. Cost might have discouraged people from adopting it in
the past but that's less of a factor with the current commodities price
of palladium.
---Carl
-- Website with online galleries and workshop information at: http://home.earthlink.net/~cweese/ NEW PICTURE GALLELRY: Connecticut Woods, April 2000
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