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> Loading Jobo 2509N Reels |
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#1
By
Keith Tapscott.
on
23rd September 2009, 06:02 PM
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Bob, do you use inversion or a Jobo rotary-processor when you develop 5x4 inch film-sheets?
I have two 2509 reels and find them quite easy to use. I agree that the optional loading jig thingy is not needed. |
#2
By
Bob
on
23rd September 2009, 06:15 PM
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Both rotary and semi-stand. I have used my CPE-2 with lift for b&w and colour but also used the Jobo tanks with stand/semi-stand for b&w. Normal inversion agitation uses a lot of developer in these tanks but with stand and semi-stand you tend to use highly dilute developers like Rodinal 100:1 or Pyrocat HD (Precsysol would do well too). I have a couple of different type of tops for the tanks: cog types for rotary and cap type for inversion so I can swap them over as required.
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#3
By
Peter Hogan
on
23rd September 2009, 06:30 PM
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Got to admit I gave up on these things long ago... just couldn't get them right.
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#4
By
Keith Tapscott.
on
23rd September 2009, 07:06 PM
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Quote:
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#5
By
Bob
on
23rd September 2009, 07:42 PM
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I make up 1.5 litres of developer and pour it in until I can see it covering the bottom of the funnel inside the cap type lid. This leaves about 50-75ml of developer in the jug. This ensures that the film is well covered but leaves an air-gap for the inversion to work. You need a well-fitting lid as the developer comes well over the top of the bottom half of the tank.
That's for the one-reel tank. I have used my three-reel tank a couple of times but I forget the amount I have used - about 3 litres I think. Could use the three-reel tank for one reel but the method above works fine as my lids fit tightly (Famous Last Words; Vol.13; pp 645)... I sometimes switch to rotary for stop and fixer (350ml) - usually rotating by hand rather than swapping to a rotary lid but it can get messy - certainly do it in the sink and wear rubber gloves! I stick a hose down the centre column to wash. |
#6
By
Bob
on
23rd September 2009, 07:48 PM
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Quote:
The earlier, non-N versions, seem to give the most trouble, especially with respect to uneven rotary development and some people suggest only loading them with four sheets, leaving the outer slots unused. I only have the newer N types and once loading them is mastered I find they work well. |
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#7
By
Keith Tapscott.
on
26th September 2009, 11:23 AM
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Quote:
I have some Prescysol-EF and I have just ordered some Champion Promicrol which I will try at the 1+14 dilution.. |
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#8
By
Keith Tapscott.
on
26th September 2009, 01:11 PM
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Out of curiosity, I placed a 2509N reel with the centre-core in my 2521 tank and filled it with water to the top. I then poured the water into a 2 litre measuring jug and it was exactly on the 1200ml mark.
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#9
By
cvansas
on
2nd August 2011, 05:44 PM
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jobo 2509 + n
Thanks a lot Bob,
Your explanation about loading films is very clear and I now also added some dents on the side my reel in order to determine the position of the 'small boss'. The first time I was developing my film in the Jobo 2520 tank something went terribly wrong during shooting and development: [image missing] As far as I can see this looks like a slideholder that has lightleaks, but during the development I guess that not taking in consideration that the emulsion side has to be faced towards the center caused the inequal development. The only thing I can not clarify is what caused the clear circular scratches on the film. Maybe anybody knows how to prevent this before Ill go back to moscow to redo the shot? best, Crispijn |
Last edited by Bob; 2nd May 2013 at 11:04 PM..
Reason: [image missing]
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