swmcl
11-Dec-2011, 21:54
Hi,
As I understand it for a 1+1+100 of Part A+Part B+water the following is an introductory guide.
Film requires 50ml per 20 sq inches. So 4x5 film requires 50ml per sheet.
The Jobo 3006 says it needs 210ml minimum to operate well.
For correct development 6 sheets of 4x5 requires 300ml minimum which is more than the Jobo 3006 minimum of 210ml. I assume by this measurement on the drum of the Jobo that it effectively means the 3006 will need to process 4 sheets of film as a minimum with 210ml of fluid.
According to a few sources to increase stain on a negative, one should return the film to the used developer after fixing. My question is whether this means to return it to depleted developer or just to the used developer ? As can be seen in the above calculations, I could put only 300ml of developer into the drum which would be the absolute minimum required for development but I would rather put in say 450 or 500ml to make sure of development. Can / should I put the film back into a mixture that is potentially only 2/3rds depleted ?
Sorry if you think this is a bit anal ...
Rgds,
As I understand it for a 1+1+100 of Part A+Part B+water the following is an introductory guide.
Film requires 50ml per 20 sq inches. So 4x5 film requires 50ml per sheet.
The Jobo 3006 says it needs 210ml minimum to operate well.
For correct development 6 sheets of 4x5 requires 300ml minimum which is more than the Jobo 3006 minimum of 210ml. I assume by this measurement on the drum of the Jobo that it effectively means the 3006 will need to process 4 sheets of film as a minimum with 210ml of fluid.
According to a few sources to increase stain on a negative, one should return the film to the used developer after fixing. My question is whether this means to return it to depleted developer or just to the used developer ? As can be seen in the above calculations, I could put only 300ml of developer into the drum which would be the absolute minimum required for development but I would rather put in say 450 or 500ml to make sure of development. Can / should I put the film back into a mixture that is potentially only 2/3rds depleted ?
Sorry if you think this is a bit anal ...
Rgds,