There should be very little difference in printing times between well exposed and properly developed negatives developed in Pyrocat-HD and a non-staining developer such as D76 or Xtol. Printing times are determined by shadow density, and since stain is proportional to silver density, lowest in the shadow areas and highest in the highlights, there should be little difference in density in the shadows between a negative developed in Pyrocat-HD in contrast to one developed in a traditional developer.
Originally Posted by Ray Bidegain
My own negatives developed in Pyrocat-HD print in about 8-10 minutes with a bank of BLB tubes, with the tubes about 5" from the printing plane. High speed films (HP5+, Tmax 400, etc.) develop more B+f than slow and medium speed films and for this reason may need slightly longer development times. Very long exposure times (and 30-60 minutes is quite long) could result from several conditions.
1. Over-exposure. If you over-expose by one stop you more than double your printing times.
2. Use of slightly fogged film. As film ages, or if left in high heat for too long, it develops a higher B+f from fogging. This can easily add a stop or more to your exposure times with a staining developer like Pyrocat-HD.
3. Too much agitation in development can also lead to higher B+f levels.