On 7/22/2010 4:45 AM IanG spake thus:

[corrected for top-posting, and WTF happened to my quoted text?]

David Nebenzahl;884098 Wrote:

After my recent success with TMX, I dTHe MDC is unfortunately not elved
into my freezerful of film
and pulled out a roll of Pan F I want to shoot. But I'm a bit mystified
by the enclosed processing instructions.

Was thinking of using D-76, and they have times for both this and ID-11
(same times, since the same developer, except that they list ID-11 at
1+1 but not D-76, though I assume I can also dilute it). But they show
the same times for both ISO 25 and 50 exposure. Can this be correct?
Other developers show different times for the two speeds.

They also show times for Perceptol, but not Microdol-X. Richard K., you
said these developers were equivalent: would you use the same times for
both of these? The Humumgous Massive Really Really Big Dev Chart
(http://www.digitaltruth.com/devchart.php) shows different times for
these (9 min. for Perceptol vs 12 min. for Microdol; should I just use
their recommendations?

The MDC is not as reliable as the Manufacturers own data because we
don't know who or how the poster reached their figures.

Ilford's Data is here and a far better starting point.

http://www.ilfordphoto.com/Webfiles/...6115811391.pdf

Thanks; I should have checked that first. As it turns out, the Ilford
sheet agrees with the Massive Dev Chart.

What it doesn't agree with is some of Ilford's own printed information:
both the inside of the film carton and the large Ilford film processing
chart I have (came with a box of paper, I think) have the same times for
ISO 25 and 50 for three developers (ID-11, Microphen and D-76) which
can't be correct. The PDF you gave us a link to appears to have the
correct data. Must be typos, I guess.

So now my only dilemma is whether I should de-rate the film at 25 or go
for the extra stop (50) and develop longer (I plan on using Microdol-X).
Any opinions on this?


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