Color developing - capacity

[rayonline_nz]

Hi, I was just reading up at Freestyle with the Arista kits. Looking at the PDF it says if they are not reused, 480ml does 4 rolls of 35mm or 120 format. The Paterson tank holds about 600ml and that does 2 135 or 1 120. Ok, maybe there are more efficient tanks out there that does it for 480ml.

Question - how does one achieve 4 rolls of 135 or 120 within 480ml of chemistry?



Thanks.

Mods - please move this to the color film / film / chemistry area. I just found this. Apologies...

 

[Mick Fagan]

Rotary processing in a Jobo processor with the 1540 tank will need 470ml of chemistry, they are giving you 10ml to play with. I generally use that tank combination to process 4 x 135 or 4 x 120 rolls of film. The alternative is to develop 2 rolls at a time using inversion (the method you are currently using) using a bit under 500ml. Whatever the amount is I round up to 500ml in both cases. Two weeks ago using inversion, I did two rolls of 135 in a Jobo 1520 tank using 500ml of developer. Yesterday I developed two rolls of 135 using rotary in the same tank, using 250ml of developer.

To answer your question, I would develop two rolls at a time via inversion for the 135 or 120 as my Jobo 1520 tank can safely do 2 x 135 and 2 x 120 rolls at once. Then I would use the same chemistry to develop the other two rolls in the time it takes to clean and dry the reels and tank. I have done this in the past quite successfully.

C41 or E6?

Mick.

 

[John51]

I've got an old Paterson Major II that I got dirt cheap from a flea market. Not really suitable for 35mm as the max length is 20 exposures. The reason I kept it is that for 120 it only needs 300ml.

 

[rayonline_nz]

Rotary processing in a Jobo processor with the 1540 tank will need 470ml of chemistry, they are giving you 10ml to play with. I generally use that tank combination to process 4 x 135 or 4 x 120 rolls of film. The alternative is to develop 2 rolls at a time using inversion (the method you are currently using) using a bit under 500ml. Whatever the amount is I round up to 500ml in both cases. Two weeks ago using inversion, I did two rolls of 135 in a Jobo 1520 tank using 500ml of developer. Yesterday I developed two rolls of 135 using rotary in the same tank, using 250ml of developer.

To answer your question, I would develop two rolls at a time via inversion for the 135 or 120 as my Jobo 1520 tank can safely do 2 x 135 and 2 x 120 rolls at once. Then I would use the same chemistry to develop the other two rolls in the time it takes to clean and dry the reels and tank. I have done this in the past quite successfully.

C41 or E6?

Mick.

Thanks for that. Mostly E6.