Glad to hear the mylar solved the contact problems for you.
I've actually removed the glass entirely from my contact frame and just
have Kreene stretched across it. I thought of trying taping it across
the glass, but Harold at Box Car seemed to feel the added effect of the
glass + kreene wouldn't be as crisp...or something. In any case, I'm
happy with the way it's been working, though removing the glass was a
little intimidating at the time.
Also, I was wondering what image/screen/wattage you're using for
exposures just out of curiosity...
Keith Taylor wrote:
I pulled the frame apart and replaced some old foam rubber that sits
under the ribbed bed of the frame with some nicer neoprene. The
pressure remained the same throughout - at least on the dial, but who
knows? While I wait for my roll of Kreene to arrive I tried using a
thin (1mil) sheet of Mylar as you would with Kreene. No more contact
problems - at least for now. I'll run some more tests tomorrow just to
make sure and keep you updated.
On May 2, 2007, at 8:37 PM, SusanV wrote:
Have you been getting the same measure of vacuum? Let us know what
you find out. Hope it's nothing major.
As for trying out the Kreene.. I taped a piece of it to the bottom of
my glass. The glass on my NuArc is "frameless" and fits into a hinge
at the back of the bed. Using the Kreene under the glass this way
just relegates it to an "anti-newton" film which seems to be working
for me. The glass actually still holds the vacuum.