Berferd
Hi everyone,
What’s the deal with the large and small Jobo tins (22xx series vs. 15xx series)?
Apparently, the ‘large’ series is older than the small one, and the small one requires less chemical.
How do they compare in terms of airtightness and so on?
What about development consistency? Apparently, the large tins produce more consistent results… is that true?
I suppose the large cans make sense if you’re performing heavy dilution of the developer, but still can’t go below a certain absolute minimum amount of the stock solution (per roll of film)?
Or are the old cans simply outdated and are only used “because you’ve already got them”?
Berferd.
Gast
As far as I know, the 15xx series is for film development and the 28xx series, for example, is for paper development. I’m not familiar with the 22xx series.
Best regards, Franz
Wolfgg
Hello Berferd,
It depends entirely on the requirements of the chemical process.
I used to need the large ones for E4; now I use them for Rodinal 1+166 and 1+200 stand development.
The small ones are for C41 and Rodinal 1+50, 1+75.
With reversal processing, there’s also the special case where, with a larger spiral pitch, it’s easier to reach the inner coils when re-exposing to light.
I’ve never had any leakage issues; they’ve been in use since around 1972.
The large series was called 2000, the small one was 1000; 1500 came later.
I could only detect differences in uniformity at very high dilutions, where there would be too little concentrate in the small can.
Regards, Wolfgang
Wolfgg
And once again, taken directly from Jobo’s 1972 documentation:
1000 series:
1100 “SPOT” 260ml 1x135 DM19.80
1200 “JET” 500ml 2x135/2x120 DM22.80
1300 "SPECIAL" 1250ml 5x135/6x120 DM58
2000 series (wide spirals):
2100 "STAR" 450ml 1x135 DM23.50
2200 "CLUB" 800ml 2x135/2x120 DM27.50
2300 "PROFI" 1900ml 5x135/6x120 DM77.50
Regards, Wolfgang
Wolf_XL
...I prefer the small canisters because I can tip them over with one hand – my hands aren’t quite the right size to do that with the large canister... ;-) I only use the large canister on the CPE2, for example for the C-41 process or when I’m using the sheet film insert.
Urnes
Small can – small films... Large can – large films
You can’t fit sheet films into the small cans. If you want to develop by hand and you’re using roll film, the small can is the smarter choice, because you’d need 1.2 litres of chemicals to develop in the large one. (Unless you have a small large can that only fits a single roll of film.:lol:). Both sizes fit in the machine (e.g. CPE2), but the small ones then need a different roll holder underneath. In the machine, even with the large can, you only need 270ml of liquid. If there’s just one roll film on the reel, 180ml is enough.
So it just depends on what you want to do and how and with which formats you want to work in future.
Regards, Sven.
PS. By the way, there are also old large canisters and new large canisters. The newer ones are the 2500 series. They look like the 1500 series, just thicker. The snap-on lids are the same. I’d better not even get started on the 3000 series canisters. :D
Knoll
If you tilt the tank by hand, weaknesses may appear on the negative wheels, particularly along the perforations. If you tilt it too quickly, these weaknesses can extend into the image wheels. This is less likely to happen with large tanks, as the chemicals flow more slowly when tilting due to the greater volume. It is therefore easier to develop evenly with large tins. However, you will also need more chemicals.
