[pure-silver] Re: ANY ONE CONFIRM AGFA 100-ROLLEI RETRO 100
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 5 May 2008 14:41:59 -0700
----- Original Message -----
From: "ERoustom" <eroustom@xxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, May 05, 2008 5:25 AM
Subject: [pure-silver] Re: ANY ONE CONFIRM AGFA 100-ROLLEI
RETRO 100
Good morning Bob,
Below is a copy of the content of a message I got back from
Maco
regarding this matter (as I was asking for better
information on
pushing Rollei Retro 400).
So there you have it, from the source.
Elias
Hello Elias,
thank you for your inquiry.
RODINAL is not a developer, which is perfectly suited to
the ROLLEI RETRO 400 / APX 400 to push. There are more
suitable developers, as e.g. DIAFINE, ACUFINE, PERCEPTOL
at the market.
ROLLEI RETRO and AGFA APX are identical.
I would not consider any of the above developers suitable
for pushing or Rodinal either. For pushing the best
developers are those containing some version of Phenidone.
Examples are Kodak Xtol, T-Max, T-Max RS, Ilford Microphen
and possibly DDX. There are some others. Next best are
moderately active Meto-Hydroquinone developers like D-76.
Perceptol and Microdol-X (which are essentially identical)
are extra-fine-grain developers which lose about 3/4 stop
speed when used full strength. When diluted 1:3 they deliver
speed about equal to D-76 but lose their extra-fine-grain
property. Xtol is probably optimum for maximum speed with
minimum grain but Kodak indicates that T-Max RS will deliver
the highest speeds.
Note that in all cases "pushing" really only increases
overall contrast. Since the contrast in the toe or low
exposure part of the curve is lower than in the overall
curve this may result in underexposed negatives with more
printable shadow areas although the highlights, which get
more normal exposure, may become harsh due to the higher
contrast.
Rodinal generaly delivers somwhat less speed than D-76 at
the same overall contrast value (contrast index) although
not as low as the extra-fine-grain types.
I wonder if Rollei Retro is _really_ identical with the
Agfa products, I mean the emulsion and coating methods are
exactly the same.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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