JOBO Expert Drum 3010 Solution Requirement

[jthacker43]

I'm planning to use the expert drum #3010 on my CPP2. This my first time processing 4x5. The documentation indicates a min 210 ml and a max 330 ml of solution. Does the amount of solution, particularly developer, depend upon the number of sheets in the drum. I would probably develop either 5 or 10 sheets at a time.

 

[polyglot]

I've never seen the 330mL max. I regularly put about 600mL in mine (on a new-motor CPP2) and it works great.

You will need enough developer in there to have enough capacity to develop the films you have in there. Say you're using Xtol, which needs 20-25mL of stock per sheet of film so if you put all 10 sheets in then you want about 250mL of stock. If you're running it at 1+1, then that means 500mL of developer working solution. If you put in only 250mL of Xtol 1+1 for 10 sheets, you'd exhaust the developer and get thinner negs than you expected.