For the past many decades I have been mixing my chemistry for one shot use. I would work out how many rolls of film I wanted to get of a kit and just dilute that amount into what ever total solution I needed for my Jobo tank. I'd work up my new development times and went from there. It worked out pretty well and results were acceptable to me. The pain was is some parts of the chemistry were very low volume, mixing 1 or 2 mL could be challenging. I ended up using syringes for those small volumes. My whole reason for doing this is that I don't process often and I found the chemistry kept longer in concentrated form.
Anyway, I might just be getting lazier these days, so I tried something different for me. I still didn't mix the full volume of my kit, but split it in half. So for my 1L kit, I mixed up 500mL. So for me this was an experiment on how long I could use that 500mL.
I just processed my 8th 36 exposure roll with a 500mL batch I mixed on July 23rd. What I did for this batch was, 1rst roll time 6:30, then I added 15 seconds for each roll. So this 8th Roll was 8:30. I could have probably gotten more rolls out of this chemistry, but I called it done.
So I grabbed an Olympus 35RD I just repaired, grabbed a roll of 15 year old Provia F ( shot at box speed ), went out and shot some pics. I was mostly testing the camera, so I shot some sequences of the same picture at different shutter speeds to see how much exposure variance I would get. There is some, but given the way this camera works, it doesn't surprise me. I also take into account the simple metering it does, I did not try to add any compensation, just took the shots as the camera metered them.
I'm happy with the results.
Anyway, I might just be getting lazier these days, so I tried something different for me. I still didn't mix the full volume of my kit, but split it in half. So for my 1L kit, I mixed up 500mL. So for me this was an experiment on how long I could use that 500mL.
I just processed my 8th 36 exposure roll with a 500mL batch I mixed on July 23rd. What I did for this batch was, 1rst roll time 6:30, then I added 15 seconds for each roll. So this 8th Roll was 8:30. I could have probably gotten more rolls out of this chemistry, but I called it done.
So I grabbed an Olympus 35RD I just repaired, grabbed a roll of 15 year old Provia F ( shot at box speed ), went out and shot some pics. I was mostly testing the camera, so I shot some sequences of the same picture at different shutter speeds to see how much exposure variance I would get. There is some, but given the way this camera works, it doesn't surprise me. I also take into account the simple metering it does, I did not try to add any compensation, just took the shots as the camera metered them.
I'm happy with the results.
