Took a few photos with my Speed Graphic of happening around the house last night. Today I developed the first 4 and as I pulled them out at the end they where all blank. I hadn't touched the camera since I was shooting, and it seemd in order. Back curtain was open, f-stop was proper. And a quick fireing while observign teh ground glass showed that there wasn't some mis-synching with the flash going on. Checked the hold I pulled the negatives from, it was the grafmatic that had advanced to 6, not the one sitting at 1. This leaves my issue to thedeveloper. I was using my usual Diafine on the negatives. First I figured that I managed to get some bath B into A last time I used it and killed the Bath A. This of course will require me to run another sheet through to verify. Then I thought of something else that I'd like some feedback on. I know Diafine doesn't really care much about temperature, but I think I remember reading on the box (or eslewhere) that it was optimal at greater then 67°. Now, up until this batch of negatives, I was working in a basement that was heated and the roughly around 67 degrees at all times, and the chemicals where kept in the basement. However, now I'm in a different house, and I didn't even consider the temperature since it was always fairly constant for me. I just poured a bit of the diafine out of the jug and stuck a thermometer into it. 54°. Is it possible that working at this temperature is beyond the working range of Diafine?