Re: HP5+ and LONG development times

I tinkered with this problem for a while before concluding that there seemed
to be no way to increase contrast for HP5. I tried one recommendation for
that film, using HC110 at 1:20 instead of 1:31, but I couldn't see a
difference. With TMAx you have the quick and dirty option of increased
agitation, which works well but unpredicatbly.
%----- Original Message -----
From: "Shannon Stoney" <shannonstoney@earthlink.net>
To: <pinhole-discussion@pinhole.com>
Cc: <alt-photo-process-l@skyway.usask.ca>
Sent: Wednesday, July 17, 2002 12:48 AM
Subject: [pinhole-discussion] HP5+ and LONG development times

> I am shooting HP5+ in the 8x10 format in a pinhole camera for cyanotypes.
I
> am having trouble getting the highlights dense enough. I am up to a 20
> minute development time now, and still the highlights only have a density
of
> 1.71. I would like a density range of about 1.6, starting at 0.35, say,
in
> the shadows. (I have to shoot it at like 3200 to get the shadows this
> thin!) Should I keep increasing the development times? Is it "bad" to go
> over 20 minutes? I process in straight D-76 in a homemade BTZS-style
tube,
> at 68 degrees. I am thinking maybe I should make the temperature warmer
> rather than making the times longer. But, then what will I do if I ever
> have to increase the development time further for a low-constrast scene?
> (Excuse the cross posting if you read
> the pinhole and alt-process lists.)
>
> --shannon
>
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Received on Wed Jul 17 06:34:26 2002