According to Kodak Z-131 table 3-3, the capacity of Kodak C-41 developer is 4 - 5 rolls of 220 per gallon or 1 roll of 220 per liter. However, Jobo gives a capacity guide of 470 ml for 2 rolls of 220 (if I remember this correctly). I tried this Jobo capacity guide many times and I don't remember ever got a good negative. I wasted a lot of time to troubleshoot this in many ways but eventually concluded that the capacity of the developer is simply much lower than that. I now develop only one roll of 220 with something like 850 ml of developer. The result is always good. This is close to Kodak's table 3-3. I planned to try again with 500 ml to process a roll of 220. Haven't got the time to do it yet. I believe I have done this before and the result was poor. I will do it again to validate (or the opposite) the number in Kodak's table 3-3.
Kodak does not specifically recommend capacity numbers for rotary processing. It does say never replenish the developer in rotary processing. Table 3-3 is the capacity guide for general batch processing.
Thanks for posting the article. I believe this is one of the Jobo's Quarterly articles. It does not say anything about Kodak C-41 developer capacity specific to rotary processing associated with Jobo processors. I once went through all those articles. I found that they never mentioned anything about C_41 developer capacity (Nor E-6) for rotary processing. The only capacity Jobo ever gave was numbers of film reels for every possible combination of Jobo tanks for every most format of films and the required volume of chemical for each reel/tank combination. The volume numbers gave by Jobo did not specify it they are for C-41, E-6 or B&W or whatever. I interpret those numbers as the minimum volume required but not necessarily the correct number for the amount of film contained in the Jobo tank. Kodak does give a capacity guide and it is the correct guide to follow even it says it is for batch processing.
This is such an old issue about C-41 developer capacity that seem never end.
thats a real drag as my cpp2 only has 600ml bottle capacity, so in effect I can't process c-41 in this machine a machine that was designed specifically for c-41 (or other four step processes) unless I do it at one 120 at a time which is madness.
I managed to source developer starter and bleach starter today, although I was told that Kodak don't make dev starter anymore so I bough half a bottle of expired stuff, anyone know if this expires rapidly like dev? Also bought a fuji dev starter that they said was compatable with kodak dev lorr. Not so sure about that though.
By "capacity" do you mean minimum chemistry required for developing per tank?
If so here is what I found, and follow for my E-6, B/W and (if I can get the chemistry) C-41.
Chemical volume for JOBO system 1500 tanks.
Chemical volume for JOBO system 2500 tanks
In my 1520 tank I use 240ml of developer for two rolls of 120 or 135. When I use the 2523 tank I use 270 ml of developer (rotational-mode for both).
RA-4 dev starter can go bad....at least fuji brand. I don't think you need bleach starter as the bleach step runs to completion...so there is no real thing as bleach that is too strong.
2 rolls of 120 in a 1520 tank with 240 ml of developer sounds too good to be true to me. Again I may be wrong. so could you tell me if the negatives were perfect? The two Jobo files give the minimum volume of juice required for the specific tank and number of reels possible for the tank. Jobo does say to refer to the chemical manufacturer's suggested volume to determine the exact volume of chemicals needed.
If Kodak Z-131 is right that it does take a liter of developer for a roll of 220 it really sucks that my huge ATL-2300 can not process 2 rolls of 220 negatives at a time. I wish I am wrong but so far I have never succeeded in processing 2 rolls of 220 at a time with the max amount of developer I can use (that's 1 liter exactly). ATL-2300 has 1 liter tanks and can program to use 1 liter max of chemical only.
I have yet to try C-41, that's why I'm here like you trying to get a handle on the chemistry. I'm usually a slide-guy but had to use Pro 800. At $8.50 a roll for developing I'm definitely motivated to do C-41 @home.