Analogfotograf
Hello, I have a question about the Tetenal E6 developer. According to the description, the 2500ml kit is sufficient for 30 rolls of 35mm film or 30 rolls of 120 film. I develop my films myself; so far, I’ve been developing black-and-white film using a JOBO CPA 2 with the JOBO Unitank 1520 and a magnetic coupling. The 1520 requires 240ml of chemicals for rotary development. So, with 2500ml of E6 chemicals, I end up with 10 films rather than 30. Or can I use less chemical when developing transparency film?
Urnes
You can fit 2 compact discs or 2 roll films in each Unitank. That brings you to about 20. I reckon that with the 2500-capacity tins, you might be able to get a combination set that takes you up to 30 films, perhaps with an extension. To be honest, I’m too lazy to go down to the cellar and check.
Regards, Sven.
Pitt23
1. Read the Tetenal instructions CAREFULLY. I know, the writing’s a bit rough… but everything important is in there.
2. Jobo has (had) an E6 manual that I find very helpful. You can find it on Google.
3. You can manage a capacity of 30 films if you use the chemicals quickly twice in a row. Tetenal even suggests three times in a row, but the third round is probably more for false-colour enthusiasts. There are also specialists in long-term storage of used chemicals, but that has never worked for me to produce acceptable results.
Good luck!
KlausWehner
If you wish to deviate from the manufacturer’s recommendations, two conditions must be met for rotary development:
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1. The liquid level in the horizontal canister must be high enough that all the spool windings on which the film is wound are completely submerged in the liquid, and
2. the chemical capacity of the dissolved substances is sufficient to develop the film reliably.?
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In my experience, 150 ml of solution is sufficient to develop a roll film in the Jobo 1520 canister.
However, this is not intended as a universal recommendation.
If a solution, for example, foams heavily, more chemical will be required.
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It would be conceivable to use displacement bodies to reduce the volume in the canister to the necessary minimum.
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Mathematically, with 2500 ml of solution and 30 films, this works out at 83 ml per film.
Is that perhaps too optimistic a figure?
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With 150 ml per roll film, 2500 ml of solution would still be enough to develop 16–17 roll films.
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Best regards
Klaus
