pentaxuser, unfortunately that won't clarify anything.
First, the difference between 24 and 8 is three times, not two.
Second, 8 films per process per 5000 ml is very low in any case. Most tanks I've seen will process a 120 film with 300 ml, and that's 16 films for 5000 ml. It would be unbelievable that you couldn't process a 120 film with 300 ml solution but you could process almost two 135-36 films with it instead. Two 135-36 films even need larger tank.
Third, as you can see, with 100 ASA films, according to the instructions, you can make 16 120 films at a time with 5000 ml. Why not 400-1600 ASA films? I know, that faster films may require larger amount of active developer (and also are harder to bleach and fix), but why this does apply only to 120 films, not 135-36 that has about the same surface area? Also, in "ASA 100" 120 and 220 have the same "rolls per process" figure, as I expect, but different "Max no of rolls". These figures sound more realistic!
These questions are still unanswered. I can't but just wonder what's going on in their heads. Either the figures are out of this world or there really is some big coating difference between similar 120 and 135 films (that would cause doubling the replenishment flow ratios per surface area), but I really don't believe it...
In addition, it wouldn't make any sense that the chemical supplier would try to guess what kind of tanks people are using. If the datasheet says "max. no of rolls per process", I understand that it means it is some limit by the chemistry itself, which, however, can't be the case here as you definitely can process one 120 film with under 625 ml of any C41 chemistry.
Last edited by hrst; 09-27-2009 at 05:32 PM. Click to view previous post history.