You're right on track. Use the Technidol to get the highest
speed available. Take it real easy on the agitation. If you have
another roll that you don't mind testing I would develop normally in
Technidol and then give it a dip in a alkali such as a 1% borax
solution for 5 minutes.

Regards,

  John S. Douglas, Photographer -  http://www.darkroompro.com
             Please remove the "_" when replying via email

I was just reading up on ways to get a little more out of the microfilm
I've been shooting in my Minolta 16, and came across a couple references
to shooting Tech Pan at EI 80 and even 100 for "continuous tone" by
dveloping in Diafine, three minutes in the first bath (as always), and
either 3/4 (for EI 80) or 1 (for EI 100) minute in the second.  I also
saw an entry for Tech Pan at EI 50 in Diafine with the first bath
diluted, though I don't recall the dilution.  If you do a Google search
on ["Tech Pan" diafine] (without the brackets) you should fine the same
pages I read a couple hours ago.

The idea of either diluting the Bath A, or giving very short processing
in Bath B, is to underdevelop the Tech Pan to keep contrast in control,
but the highly active PQ developer still results in a speed increase
(or, if you prefer, preserves the document speed while producing
pictorial contrast).  And yes, Diafine will tend to increase grain a
bit, but Tech Pan will still be pretty fine.

I'm interested in the process -- I find EI 25 with microfilm a little
limiting; even EI 50 is a pain with an f/3.5 lens, and my negatives look
pushed at EI 50.

   Put it in the frig. Take up Homebrew. Compound some Perfection
XR-1. Take the roll out of the frig. Let it warm up. Process.  Dan

Look in Digital Truth.  I seem to recall someone has a time/temp using
Rodinal 1:100 and speed in the 80 to 125 range.  Maybe someone has the info
and will post here as well.  You might also try a search on Photo.Net.

Ted Corbo <tcorbo@qwest.net> skrev i
meldingsnyheter:06eb805qm97nu9f04bavmmacbl9m23gmaq@4ax.com...

I'm usin TechPan at ISO 80 as my standard fil, actually.

I process in Tetnal Neofin Doku for 18,5 mins at 22 deg C. The developer is
made for TechPan and agfaortho to use as pictorial film.
Check here:
http://www.tetenal.com/f_photo_consumer_sw_film_dosen_uk.htm

Or here:
http://www.digitaltruth.com/chart/tables/tpan.html

Ted:

I push Tech Pan periodically in a 50:50 mix of Rodinal and HC-110
it produces the same results as Technidol at 3 cents per roll instead of
$3. For subminiature films.
in 200 ml water add
        21 drops HC-110
 and 21 drops Rodinal.

 Draw a time/temp line from 11 mins @84Fto 19 mins @60F.
To double the E.I. Double the processing times.

Agitate 5 secs every 30.

Al Doyle