From: Steve Shapiro (sgshiya@redshift.com)
Date: 07/16/01-11:23:52 AM Z
With all that trouble using the Jobo, what stops you from tray development
and developing by inspection?
The anti-halation dye washed off because it will wash off with any liquid.
Water, as a pre wash is standard.
Additionally, to do a pre wash as pre wetting in the process of tray
development, it makes the film slip with no cohesion, emulsion damage while
shuffling film.
Steve Shapiro, Carmel, CA
PS
The SOD metaborate extends the activity of the
developer, and in fact this runs contrary to the old pyro negatives which
were made using a formula that didn't leave a stain. They thought the stain
was 'dirty' and in fact, they were right.
Pyro developer formulas are successful because of the sensitivity of the
developing agent, pyrogallolic acid; and various users determined the
accellorators and restrainers produced different results. Current pyro
trends are mostly popular for alternative to silver gelatin printing
techniques.
Let me know if anybody wants toknow more about tray development by
inspection using pyro.
----- Original Message -----
From: "Nash Computer Technology" <nashcom@btinternet.com>
To: "Alt Photo" <alt-photo-process-l@skyway.usask.ca>
Sent: Sunday, July 15, 2001 5:55 AM
Subject: Sodium Metaborate
> Hi
>
> I'm curious about what Sodium Metaborate does with regard to Pyro
> development.
>
> I've been using Rollo Pyro with 5x4" negs in a Jobo CPE2 and 5x4" drum.
> However, I now need to process 10x8" negs, and have been having a few
> problems.
>
> I thought I would try a 10x8" print drum on my Jobo (to save the expense
of
> buying an Expert drum and/or a CPA/CPP processor). The first attempt
> produced negs where the anti-halation layer wasn't sufficently cleared. I
> re-fixed in a tray and rinsed, and it got rid of the marks, but I wasn't
too
> happy about the results.
>
> The next time, I removed the drum from the processor about one minute into
> the initial sodium metaborate bath and also one minute into the
development,
> and rocked the drum laterally whilst turning it. By this I hoped to
acheive
> chemicals getting behind the film with a bit of agitation, and sure
enough -
> no anti-halation layer was left. However, there seemed to be uneven
> development around the areas of the ribs in the print drum - there are a
> couple of noticeable lines from top to bottom on my prints.
>
> The next thing I thought about trying was a tray pre-soak, but am not sure
> whether to do this in a tray of just water before transferring the film to
> the drum and to the first sodium metaborate bath, or whether to do the
> sodium metaborate bath in a tray, and go straight into development when
the
> film is transferred to the drum. From this, I wonder if the time in the
> sodium metaborate or water is critical, or whether I could pre-soak each
> film separately.
>
> If this doesn't work, I'll need to try tray processing with PMK Pyro, but
I
> suspect that could be fraught - I would also have to travel to a darkroom
as
> I don't have the facilities for multiple tray processing at home.
>
>
> David Nash
>
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