RE: lith film and pinholes

[Joachim Oppenheimer <joachim@microdsi.net>]

I am convinced that many factors can disrupt the thin emulsion layer from
its base in lith film, and fluctuating temperature can be a culprit. I have
tried to hold temperatures between developer and the next series of trays
constant, within a degree or so. (My guess is that it is the relative change
rather than the precise temperature that matters). I had noticed that my
developer tended to be warmer than the hypo for somewhat obscure reasons
that I can (but wont) hypothecate about. Under that circumstance I noted the
pinholes. The other suggestions that were posted may be even more
significant, but that was the adjustment I made that seemed to do the trick.
Lith is just more fragile - an unscientific assessment, but almost certainly
valid. Joachim

-----Original Message-----
From: Judy Seigel [mailto:jseigel@panix.com]
Sent: Friday, May 10, 2002 12:30 PM
To: alt-photo-process-l@sask.usask.ca
Subject: RE: lith film and pinholes




On Thu, 9 May 2002, Joachim Oppenheimer wrote:
> ... Since I have been meticulous with temperature
> control I have not seen pinholes in my litho, but that is about as
> scientific as observing that I do not get pinholes in litho when I sleep,

Don't keep us in suspense -- what KIND of temperature control?  Do you
mean all at constant temperature... if so, which?  Or simply no CHANGES in
temperature?  Or... ?

Judy