Andrew, is the Efke IR the ISO 25 (?) speed. I have a couple hundred sheets in the refrigerator in 11x14. I've never used it, is D19 pretty much required for carbon printing? I was going to use Pyrocat HD. Does D19 produce usable carbon negatives? I've heard it suggested many times.
Hi Curt, sorry for late reply. Yes, it is the ISO 25 stuff. There are other high contrast developers that will work, I just happened to be more familiar with D-19. Pyrocat HD is my main developer, but I could not get HP5 or Efke IR to print in carbon with it. Here is a scan of carbon transfer print made with Efke IR 8x10 and D-19.