Originally Posted by Reinhold
I can believe that there is some bleed from print to paper.
The stack is weighted on top and contact is intimate. Perhaps
that is as it should be. Paper separators as with many other
materials used in darkroom work date from ages ago. The
paper in direct contact and under pressure will absorb
moisture and direct it to the two face sheets of the
bottom and top corrugated boards.
I couldn't say how much of the very little chemistry
left in the paper is transferred. Cellulose is hydrophilic
so making it more believable that some transfer occurs.
So much for transfer from paper to separator. The print
is cleaner for the transfer and if there is no reversal of
transfer, as may be the case, then no problem.
There is another matter to be considered in the choice
of separator material and that is permeability. Will the
material allow for the free passage of water vapor? As
I see it the corrugated board's facing sheets present
the greatest barrier. All of the non-woven very
hydrophobic separator materials I've tested
are extremely permeable. Dan