That is an interesting result. My experience with PPPD is that it gave me fairly low contrast on the current lot of Grade 2 Azo (compared to MS Amidol and Ansco 130).Originally Posted by Silverpixels5
I started with no KBr in the working developer. It gave me close to a grade 2, and very warm tones - with the Dmax going a bit red. I then added some 10% KBr (twice as much as Don recommended - I goofed) and the developer activity slowed way down. The image tone shifted to blue/black and the contrast dropped to between Grade 1 and 1.5.
I think contrast and tone control is possible by fine tuning the KBr ratio and by increasing/decreasing the dilution.