[pure-silver] Re: HD Curve for Agfa Ortho 25
- From: <mail1@xxxxxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sun, 2 Jun 2013 23:53:01 -0700
Marty
I imagine you would have to test the film using Rodinal at 200to1. I suspect
you might find the developer dilution could cause a problem, with not enough
developer to develop the film.
I used some high diluted developers in a rotary processor and I resorted to
nitrogen injection into the tank to stop developer failure due to
oxidization.
I found that increasing the dilution extended the development time and
flatten the curve. High dilution developers can cause irregular contrast
curves
You might consider Photographer's Formulary cat. #01-0080 Modified POTA
(Delagi #8) developer. This developer was designed Kodak Tech Pan film.
Regards, Jonathan
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Martin magid
Sent: Tuesday, May 28, 2013 8:32 AM
To: Pure Silver
Subject: [pure-silver] HD Curve for Agfa Ortho 25
On May 18, 2011 Edward Zimmermann provided this forum with a formula for
using Agfa Ortho 25 for pictorial applications, involving "Rodinal 1:200
with a dash of Sodium Carbonate."
Does anyone know where I can find an HD characteristic curve for that film
using that developer? If you have such a curve, can you email it to me with
an attachment?
Thanks,
Marty
Other related posts:
