Do not use 500mL in that tank, per Jobo instructions. Agitation will not be as intended by the manufacturer, although I'm sure results are not all that bad. For 3010, min. is 210 mL and max. is 350mL. I always use 250mL so that the 3.75L (one gallon) divvies up nicely. This is one of the true beauties of the Jobo Expert drums: minimal chemical use. Use your developer one shot, also per Jobo instructions. There is so much sloshing and contact with air that it is done for after development. I save the other chemicals, although Jobo says not to. Do not do your stabilizer in the drum, as it is very difficult to wash out of the tank and out of the system, and can contaminate your next batch. Stabilize in trays instead.
The instructions for mixing the chemicals are:
1. Start with 2.8 L of water at 27 to 32 C.
2. With stirring, add the contents of the bottle of part A.
3. With stirring, add the contents of the bottle part B.
4. Add the contents of the bottle part C.
5. Add water to bring the total volume to 3.8 L. Stir until the solution is completely mixed.
Although this is from the gallon kit which has now been replaced by the 2 Liter or 10 Liter kit.
As for mixing smaller quantities, it is not really worth the trouble, IMHO...especially with developer which is 1. cheap, and 2. has small bottles which could make measurement difficult and inaccurate. I'm sure you could do it and it would work fine, but from my point of view, I would not bother. Bleach is used straight out of the bottle. For fixer, it would not be that difficult to mix up a small batch, figured out using the same ratio used for the gallon. For stabilizer (now known as final rinse), you might have trouble dividing such a small bottle again. I would just use the new 2 L kit if you won't be processing that much.
Your developer has a six week shelf life.
Bleach lasts indefinitely, and its life is determined only by the amount of film that goes through it. Unreplenished, this is 120 rolls of 135/120, 60 rolls of 220, or 480 sheets of 4x5, according to the Kodak process chart I go by.
Fixer and stabilizer last for eight weeks before going bad.
You do not want to go past the six weeks for developer life; believe me from experience.
Good luck, and let me know if you have any more questions. I am quite familiar with this process in your exact tank.
2F/2F
