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

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Subject: Re: [Leica] AM50
From: "Don" <don.ro@verizon.net>
Date: Tue, 19 Mar 2002 12:58:40 -0600
References: <NEBBJDFBIKOBILIKPPBNGEMPIOAA.red735i@earthlink.net>

Have you tried mixing your own pyrocatechol / sodium hydroxide type
developer?

Don R.
- ----- Original Message -----
From: "Frank Filippone" <red735i@earthlink.net>
To: "Leica-Users-Group" <leica-users@mejac.palo-alto.ca.us>
Sent: Tuesday, March 19, 2002 12:21 PM
Subject: [Leica] AM50


> 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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>


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In reply to: Message from "Frank Filippone" <red735i@earthlink.net> ([Leica] AM50)