Kodak Slide Duplication film 35mm - Kodak E-4 reversal process from ca1975. I shot these at ISO 12 in my Nikon F4s with a Nikkor ai 35-105 lens (which is another story). It’s been a while since I’ve shot this film and ISO 6 would have been better as some of these were a bit underdone and the best were in bright sun. Cross processed to a negative in Kodak C-22 process. The film doesn’t mind C-22 and in some cases C-22 would get more speed out of E-4 film. Not a big consideration these days. C-22 and E-4 color developer are very close. The process yields dense negatives that can be difficult to scan and that is frustrating. Some of these scan and clean up quite readily. I could do with about 1000 feet of this film even though it is a compromise with color and grain/acutance. This recipe is from the 1980 British Journal of Photography and pretty easy to put together and run, esp since it is a room temperature process. Other versions are Patrick Dignan and Francis Miniter’s versions. These are slightly different with ingredients that are a little less common. If you want some insight into my world. Slide Dupe E-4 was the first color film I developed myself. Sourced all the formulae and chemicals for the whole process, guestimated the ISO etc and got passible pictures. Most people just get a C-41 kit and process actual C-41 film with it. Not mean I do everything the hard way… C-22 (BJP, 1980, pp 186-187) pH 10.6 Calgon (sodium hexametaphosphate) 2.0 g Benzyl Alcohol 5.0 ml Sodium Metaborate or Kodalk 85.0 g Sodium Sulphite (anhydrous) 2.0 g Potassium Bromide 1.6 g CD-3 ( CD3 ) 5.3 g Water to 1000 ml Fixer (was ammonium thiosulphate crystalline) I substituted home made ammonium thioslphate Water at 52°C – 750ml Sodium Thiosulfate 200g Ammonium Sulphate 107g Potassium Metabisulfite 20g (to get the pH within C-22 range of 4.4-4.6) Water to 1000 ml

2 Commenti

  1. charliedontsurf
    charliedontsurf ·

    I'd have to live like a monk to develop my film this way lol.! It sounds so time consuming. That's dedication mate!

  2. mike1allison
    mike1allison ·

    @charliedontsurf nah its dead easy. As you know crummy old film doesn't always play along, but the process is ok. The difference over b&w is the bleach step and usually a stop bath. You can avoid stop in b&w most of the time but seems like a critical step sometimes in color. This is essentially a room temp process. C-41 is only one step more than b&w but you have to keep the temps up on all the steps which is a bit tiring to do a bunch of rolls at once. If I lived like a monk I'd be banned! Lol uploading 10 rolls a day. Scanning is the time consuming part.

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