David, I'm not familiar with Pan F+ processed in PMK, so I can't comment on the base color you are getting. The fact that you say the fog pattern is random makes me think that the film was old or exposed to high heat. This type of fog pattern is consistant with film that was not processed soon after exposure, especially when kept in areas of high temperature and low humidity.(posted 8380 days ago)Regards, David Carper ILFORD Technical Service