U of S | Mailing List Archive | alt-photo-process-l | Exacto Blade Not Clearing?

Exacto Blade Not Clearing?

I set up what I thought might be a test of how well my prints were clearing
I included an opaque object at the edge of a test print -- an exacto blade
to be more precise. Strangely, the dense parts of my stepwedge cleared fine
but the exacto blade left a fair amount of stain behind -- like a 5 per cent
grey. So the question is, why? This was a VDB print shot for 8 minutes on
flourescent tubes. Like I said the dense areas of my stepwedge are paper
white. Does metal pick up and emit UV from within? Second question, what's
the best method for determining if a VDB has been cleared properly? Thx.