Quote Originally Posted by juan View Post
If you are unable to get the frame to hold a vacuum, you can still use it. Just put a few sheets of mat board down on the rubber mat, put your paper and negative on top, and close the glass. The mat board takes up the extra space, so the frame will act as a large contact printing frame.
My Nuarc frame was uneven and the rubber gasket would not seal. When I pressed down on the glass frame and found out what side was low, I actually used masking tape as quasi shim material under the gasket edge that screws down to get the glass to sit level under the and allow the frame to make a seal. Works like a champ. I went to an auto supply store to get hose and a bleeder valve to put in the supply line that I can use to take off the vacuum and open the frame.