William Robb wrote: (snip)
>.... and because > of the low chemistry volumes, developers with high capacity must be > used. > That's a downside of the CPP/CPE series processors that have been discussed. The big problem with those is that they are designed for the same reels as used by Jobo inversion tanks. The ATL series of processors use much larger diameter reels in wider tanks. That means more chemicals are available to avoid the problem of chemical depletion that can occur before the process finishes when using the small diameter reels in the skinnier tanks. The wider reels also mean that all of the film is close to the outside, none near the centreline. In consequence all of the film travels at a similar speed during rotation and gets more consistent agitation from first to last frame. This is surprisingly unimportant with colour processing but b&w film demands greater evenness of agitation. regards, Anthony Farr
