Jason, thanks for sharing the experimenters' approach and attitude. You got it right! I find that it is an adventure. It's almost like explorers of old looking for new lands: I enjoy discovering something new. Surprisingly, even after all these decades, there are still discoveries to be made in B&W developers. Anyway, the formula for this developer looks like something that was diluted 1+1, but it was actually designed that way, and is matching or even beating XTOL's image-quality.
Originally Posted by kb3lms
The 2.2 is as good a guess as any for different films. The pH is lower, which films probably respond differently to, so a little dialing-in will be needed for each film.
I didn't know you were working on coating PET. Wow! Maybe I should pay attention to the other forums out there. A quick search showed the long substrates thread.