From: Christina Z. Anderson (zphoto@montana.net)
Date: 11/25/01-06:05:35 PM Z
Don't use the PMK spent developer afterbath as Hutchings recommends; Bob
Herbst says this only adds non proportional stain which amounts to base plus
fog and longer platinum printing times. His article appeared in View Camera
Mag a while back, with all his graphs proving this. I quit doing the
afterbath and my negs are perfectly stained, and fine.
Chris
> Hello from Albuquerque NM. This is my first posting to this fine
> list....
>
> I've started doing platinum/palladium. Have done two sessions in my
> newly up and running home rig. I'm excited by the results I'm getting
> but am plagued by preposterously long exposures. Here's what I do: I'm
> shooting FP4+ (5x7 and 8x10) @ EI 64, erring on the side of
> over-exposure. Nothing fancy as to reading; for the time being, to keep
> it simple, I'm just doing split readings (mostly between the darkest and
> lightest readings on the palm of my hand), leaving any particular
> contrast control to the printing stage. I'm developing the film in PMK
> for 12 minutes at 70F. All exposures, regardless. The printing is on
> Platine. I've done a couple prints with pure palladium, a couple with
> about 55/45 Pt to Pd, adding some contrast on one occasion with a small
> amount of sodium dichromate in the pot/oxalate developer. The color and
> contrast need tweaking but I'm happy with both. The exposure times are
> an outrage: From 20 to 80 minutes. I can live with 20, and I
> understand there's only 2 stops difference between that and 80, but most
> the exposures are over 50. The light source is a new "oven" from
> Edwards, which I feel is working correctly. Can anyone tell me if
> anything jumps out of the above procedure as the likely repeat cause of
> these pokey exposures?? I'd sure like to stick with Pyro and know that
> that is the principal culprit. But, you know, if I could just get to
> 15-20 minute exposures, I'd be satisfied.... Thank you.
>
> jeff buckels (albuquerque nm)
>
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