[pure-silver] Re: SNOOPY TO THE RESCUE? HD Curve for Agfa Ortho 25
- From: <C.Breukel@xxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 3 Jun 2013 13:49:08 +0000
I too received a generous amount of film from Snoopy, and I dialled it in to a
developer designed by Jay DeFehr: I shoot at 10 Asa and process below developer
(which you have to mix yourself), for 15 minutes in a Patterson tank at 20degC.
I am quite happy with the results.
Good luck!
Best,
Cor
(no curve though)
A
Glycol 150 ml (heat to 50-600C) 75 ml
Phenidone 7g 3.5 g
Ascorbic acid 1g 0.5 g
Glycol to 200 ml 100 ml
B
sodium carbonate 20% solution
Dilute 1:1:100
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of BOB KISS
Sent: maandag 3 juni 2013 15:32
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: SNOOPY TO THE RESCUE? HD Curve for Agfa Ortho 25
DEAR MARTY,
I think the fellow named Snoopy on this list sent me some
suggestions for using this film as continuous tone. He has send me quite a few
rolls of Agfa Ortho 25 medium format film.
Here are some of his (and other's) recommendations:
1) You can try 4-6 minutes of Rodinal-S (Special) (1:15) at 20 centigrade as a
starting point. The folks from the club usually went for the shorter time.
2) One of them steadfastly maintains he got nice images out with Rodinal
Special at 1:25 and 8 minutes. Usual AGFA agitation: first 30 seconds
continuous and one tilt every 30 sec thereafter.
***Rodinal Special is very similar to Agfa Studional available in the US
(Special is not).
3) For PMK, normal recommended dilution: ASAF - 12 Temp - Nominal 68F
Exposed and processed for Zone System "N" (normal) contrast Time - 10 min -
agitating every 15 sec
Perhaps Snoopy can jump in here with suggestions...
CHEERS!
BOB
________________________________
From: pure-silver-bounce@xxxxxxxxxxxxx<mailto:pure-silver-bounce@xxxxxxxxxxxxx>
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of
mail1@xxxxxxxxxxxxxxxxx<mailto:mail1@xxxxxxxxxxxxxxxxx>
Sent: Monday, June 03, 2013 2:53 AM
To: pure-silver@xxxxxxxxxxxxx<mailto:pure-silver@xxxxxxxxxxxxx>
Subject: [pure-silver] Re: HD Curve for Agfa Ortho 25
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>
[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
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