Archived posting to the Leica Users Group, 2002/03/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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 > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html