On Apr 7, 4:49=A0am, Peter <w2...@[EMAIL PROTECTED]
> wrote:
> On Apr 6, 9:46=A0pm, sometime.photograp...@[EMAIL PROTECTED]
wrote:
>
> > Given that the basement is still coolish from the winter, what would
> > be the best development time factor for D76 at 60 deg F (15 deg C)?
>
> ....
>
> > Thanks for any comments.
>
> You have mentioned a number of points of uncertainty:
> long hiatus
> old film
> long time since exposure
>
> You haven't mentioned much about the rest of your technique (e.g., how
> sure are you that you used the correct exposure allowing for old film
> & etc., why not keep the solutions in a warm room, load the film in a
> tank in your dark room and develop the film at a more convenient
> temperature in a warm room, how accurated is your time keeping,
> temperature measurement and how consistently correct are the solutions
> & etc).
A digital timer is being used, with lap times for each step in the
processing. A review of the split times shows that draining the old
tank being used is taking longer than expected, but longer time is not
the problem here. It is possible that the film being at room
temperature for over a year was a factor. The latest roll turned out
with good density. More later.
> Personally, I've had poor experience with Plus-x in D-76 at cold
> temperatures. =A0I settled on never developing it below 65F. =A0That was
> decades ago and I forget the details. =A0Perhaps I was wrong.
Given that the Kodak datasheets do not go below 65 deg F, this might
well be the case.
> Even so, you need to prove you can get a correctly exposed roll of
> your old film developed to normal density and contrast. =A0To do this, I
> thing you need to plan on trying more than one roll of test pictures
> (sheet film is an attractive alternative for such experiments, if
> available).
Getting a good roll done was a priority for me, too. A heater in a
small area took the temperature of the chemicals up to 22 deg C over
the course of the day and processing on another roll was done at that
temperature. This time, D76 at 1:1 dilution was used, and the results
look good.
There is a certain satisfaction in the process of developing film,
sight unseen for most of the processing, and finally seeing the
results turn out well.
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