- Joined
- Nov 17, 2004
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Something else just occurred to me, not having handled a 2502 rollfilm reel before, and just having looked them up online. The 2501 rollfilm reel, in addition to being 'open-sided' with only a few radial support arms, takes up to two rolls of 135-36 film on a single reel, loaded end-to-end. This means that the distance between layers of film loaded on the 2502 reel (which only takes one roll of 135-36) is approximately double of that of the 2501 reel. That and the open-sided design would go a long way to explaining why I was getting the surge/flow marks from the radial support arms as well as extra edge density on 35mm and 120 film. With closer spaced film and open sides, the developer would tend not to flow as readily at the center of the film and more readily at the edges with the 2501 reel, creating a difference in effective agitation from center to edge. That may also be the reason that the increased turbulence from the higher speed worked better with the 2501.
Given that the 2509 and 2501 reels were fairly quickly replaced with significantly different designs and different procedure recommendations, I'd have to say that I was working with 'beta' hardware all 'round, and that my results are probably not repeatable with the later 2509N and 2502 reels. I'll accept donations of the final releases of these products via PM.
Lee
Given that the 2509 and 2501 reels were fairly quickly replaced with significantly different designs and different procedure recommendations, I'd have to say that I was working with 'beta' hardware all 'round, and that my results are probably not repeatable with the later 2509N and 2502 reels. I'll accept donations of the final releases of these products via PM.
Lee