If RC paper is showing more, maybe it (or at least part of it)
is something like the polymer fallout that causes the interior surface of
car windscreens to get a film on them. It's the plastic in the car
breaking down.
At 07:27 AM 19/04/2006, you wrote:
I agree. Here is a list of the materials used:
0. Fome-Cor backing board 1. Colormount 100% cotton rag-board 2. Seal Colormount dry-mounting tissue 3. Ilford MG-IV FB or Kodak PolymaxII RC 4. Typical processing-chemical residue, still in the print fibers 5. The glass cleaner
My guess is now on 3 and some 4, because the MG-IV FB showed far less (but still some) than PolymaxII RC.
Regards
Ralph W. Lambrecht
http://www.darkroomagic.com
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