I'm having trouble with the OHP film sticking to the coated sheet of Pt/Pd paper. Pictorico doesn't do it as much as Fixxons, but the problem is still there. It may be that the material needs either a very long drying period or a short period of forced drying with heat. However the two new papers, Magnani/Revere Platinum and New Platine, both are showing that they want to be printed much drier than my old favorite Stonehenge (which no longer works for Pt/Pd) or for that matter, Old Platine which wanted very high humidity. Also, the OHP material is much thinner and more flexible than real film, which makes me think the vacuum frame is overkill for the 11x14 prints I'm planning to make. Maybe the film doesn't need to be crushed against the paper with 24 psi.
So I removed the vac frame and repositioned the exposure unit to it's normal pizza oven arrangement, using a standard spring-back frame. Since the regular window glass in this frame is much more transparent than the heavy plate glass in the vac frame, I had to do a new test for minimum time to dmax with the new configuration.