I'm about to have a go at developing C-41 after the good results I got from trying my hand at E-6
I want to try a mixed film format developing run, 4X5's and 120, in a 2553 tank with reels in a CPA2
and I want to double check my math with those that might have done such a developing run.
The Jobo C-41 press kit has a chart for the amount of developer needed for X number of sheets
or rolls, I'm guessing that it's based on square inches of film that needs to be developed.
So, as a starting point, 240ml will develop 2 - 120 rolls which is 162.5 sq.in.
(120 roll = 81.25 sq.in. )
the same 240ml will develop 8 sheets of 4X5
( 1- 4X5 sheet = 20 sq.in., so 8 sheets = 160 sq.in. )
Am I correct in assuming that as long as I make sure that the combined sq. inches of film, 4x5 and 120,
equals 160 - 162.5 sq.in. for 240 ml of chemicals I should be copacetic ?
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