U of S | Mailing List Archive | alt-photo-process-l | Image bleeding into masked area

Image bleeding into masked area

I am printing some Pt/Pd prints and the ugly monster of image bleeding into the masked area has surfaced. The masking is done with lithographer's tape. I am printing with a vacuum and noticed that the problem goes away when I use very high pressure, say over 20 inches of mercury. However, I don't like to use that much pressure and wonder what remedies others have found for this type of bleeding. I remember some discussion of this in the past on the list but can not find the thread.

Sandy King