- Joined
- Aug 29, 2011
- Messages
- 7
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I purchased the Rollei Compard Digibase C41 chemistry to test out in my Jobo CPE-2 with a 1520 Unitank (takes one 120 reel). I would normally use a 1540 tank and knock out two reels, but the set of chemistry I bought was the smallest batch and made only 250 ml of chemicals per step. Thus, I was relegated to the smaller 1520 tank.
After developing at the proper times at 37.5 deg C I had two rolls of film turn out with only 4 images developed, and the other 8 on the roll completely blank. I'm not talking just faded, uneven development or striping, I mean seemingly untouched by developer. The 4 shots that did develop properly came out great, no irregularities.
Both times I ran the developer, the 4 shots that did come out were on the outermost track of the reel (AKA the section of the film you can see when you first remove the reel from the tank after developing). The rest of the film that cannot be seen in the inner tracks was totally undeveloped both times. Check the pictures I attached for one of 120 rolls, the other roll looks identical.
I am confident the issue is mechanical/physical with the tank, not an issue with the developer. I filled the tank to the correct capacity (it is listed for 240 ml and I used 250 ml on each step), so I don't believe it is a lack of chemicals. Also, the reel was only loaded with one 120 strip each time, so the film should have been easily submerged being as it was on the outermost portion of the reel.
So then:
Is the outer section of film blocking chemicals from getting only the rest of the film surface perhaps? Is there an issue with the 1520 tank that I am unaware of? I truly don't know what could be causing this, it is a mystery.
Other details: 1520 tank was used with a cog and lift. Also, both reels were loaded smoothly, they film was not off track or touching itself.
Thanks for your mystery-solving skills,
David
After developing at the proper times at 37.5 deg C I had two rolls of film turn out with only 4 images developed, and the other 8 on the roll completely blank. I'm not talking just faded, uneven development or striping, I mean seemingly untouched by developer. The 4 shots that did develop properly came out great, no irregularities.
Both times I ran the developer, the 4 shots that did come out were on the outermost track of the reel (AKA the section of the film you can see when you first remove the reel from the tank after developing). The rest of the film that cannot be seen in the inner tracks was totally undeveloped both times. Check the pictures I attached for one of 120 rolls, the other roll looks identical.
I am confident the issue is mechanical/physical with the tank, not an issue with the developer. I filled the tank to the correct capacity (it is listed for 240 ml and I used 250 ml on each step), so I don't believe it is a lack of chemicals. Also, the reel was only loaded with one 120 strip each time, so the film should have been easily submerged being as it was on the outermost portion of the reel.
So then:
Is the outer section of film blocking chemicals from getting only the rest of the film surface perhaps? Is there an issue with the 1520 tank that I am unaware of? I truly don't know what could be causing this, it is a mystery.
Other details: 1520 tank was used with a cog and lift. Also, both reels were loaded smoothly, they film was not off track or touching itself.
Thanks for your mystery-solving skills,
David
