Archived posting to the Leica Users Group, 2002/03/19

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Subject: [Leica] AM50
From: "Frank Filippone" <red735i@earthlink.net>
Date: Tue, 19 Mar 2002 10:21:39 -0800

I just got a note back from the Europeon dealership that stocks this
developer.  He is willing to take my $$ and ship the stuff to the USA.....
Now getting it in here is another story.....there must be SOMETHING in there
that is against postal regs.....

Cost?  in Euros, 3x20 ml bottles is 2.59 Euros    a 60mL bottle  for 2.2
Euros
Shipping about doubles this cost.. so $4 a bottle of 60mL

Dilution is 1:30.... with a minimum of 8mL per 80 square inches of film ( 1
36exposure roll of film) ... 240mL per roll of diluted developer
So price is about $4 per 60mL bottle, enough to process _____  60x30=1800
1800/240= about 8 rolls of film.  or 50 cents a roll.

You dilute the concentrate just before using, and you may not allow air to
get to the developer concentrate for fear of oxidation.

Thanks to a translation from one of our members, I will copy the processing
instruction  here....
I have only 1 interested party so far... any other takers?

Frank

AM50

General

AM50 is a 1 shot fine grain developer, that is specially made to develop
films that
have been exposed at their rated speed.  AM 50 is a surface developer based
on
pyrocatechol / sodium hydroxide. By the high pH value it is however no
genuine balance
developer.??????

Films, which are to be developed in AM50 must be correctly exposed, under or
over
exposed film results in quality losses. In the case of the correct exposure,
negatives
of undreamt-of quality with very fine grain, high outline sharpness and
extremely fine
detail result. This applies both to films of low as well as with high
sensitivity.
Basically all exposure indices can be developed in AM50. (read all films)

Packing

AM50 is available in small refillable bottles with screw-type cap. The size
of the
bottle enables a simple refill from the refilling packing.  By this method
one always
has fresh developer to work with, which for constant high quality, is a
prerequisite.
Additionally it offers max. Security to you.  Small packing 3 x 20 ml,
refilling 60ml.

Savings through the use of the 20 ml. bottles: If all contents of a bottle
are not
used, then the remainder in the same bottle can be kept and be filled up to
the filling
mark with water. The additional dilution should be noted on the bottle.

Usage
Mix only briefly before use with simple tap water to dilute.  After good
agitating the
solution is ready for use.

Dilution

Normal 1 + 29/1:30. Example: for a certain developing tank, 250 ml. liquid
is
necessary.  Begin with 232 ml water and add 8 ml. AM50 Thoroughly agitate
briefly, and
bring up to working temperature.  The developer is ready for the immediate
use.  Use
only 1:30 as working solution.

Minimum concentrate of AM50 per 35 mm film is 8ml.  After use the solution
no longer
operates reliably and must be discarded.

Working temperature

Optimum results are obtained with a  temperature of exactly 20°C. Deviations
of more
than 0,5°C are to be avoided. We therefore expressly indicate only
development times
for 20°C.

Agitation

For 35mm films agitate constantly for the first 30 seconds then at 30 second
intervals
2x inversion of the developing tank.

For roll films agitate constantly for the first 30 seconds then at 15 second
intervals
1x inversion of the developing tank.  This agitation insures even
development with no,
so named, bromide effect.

Exposure

Expose the film as recommended by the manufacturer.  This does not apply
however to
Ilford Delta 3200 and Kodak tmax 3200 film.  See table.

Development table

The development times are exclusive of filling/emptying times, are expressed
in minutes
and based on a developer temperature of 20°C.  The exposure index and
development times
are based upon an average negative contrast.  The development times are for
35 mm and
roll films and are based upon our recent experience with the film emulsions.
If your
method of working is to over expose by 1 stop then we suggest you reduce the
development times by 20-30%.  This does not apply to Ilford 3200 and Kodak t
max 3200
films.

Film type            ISO          Exposed at            Development time

Agfapan APX 25       25/15°          25/15°                     7'30"
Agfapan APX 100     100/21°         100/21°                    10'00"
Agfapan APX 400     400/27°         400/27°                     8'30"
Fuji Neopan 100     100/21°         125/22°                     7'30"
Fuji Neopan Prof    400/27°         400/27°                     8'30"
Ilford Pan F Plus    50/18°          50/18°                     3'45"
Ilford Delta 100 Pro100/21°         100/21°                     6'30"
Ilford FP 4 Plus    125/22°         125/22°                     5'00"
Ilford HP 5 Plus    400/27°         400/27°                     7'30"
Ilford Delta 400 Prof   400/27°     400/27°                    10'30"
Ilford Delta 3200   3200/36°       1600/33°                    10'00"
Kodak Plus X Pro     125/22°        125/22°                     4'30"
Kodak Td X           400/27°        400/27°                     8'30"
Kodak T-Max 100      100/21°        100/21°                     8'00"
Kodak T-Max 400      400/27°        400/27°                     9'00"
Kodak T-Max 3200     3200/36°       1600/33°                    10'0"
Kodak T-Max 3200     3200/36°       3200/36°                    15'00"
Tura P 150           100/21°         100/21°                    10'00"
Tura P 400           400/27°         400/27°                     8'30"



Frank Filippone
red735i@earthlink.net

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Replies: Reply from Christer Almqvist <chris@almqvist.net> (Re: [Leica] AM50)
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