Hi, I recently made some small matte board masks to use as a negative carrier for 6x7 black and white negatives. However, when I put the film between them the negative definitely does not stay totally flat. I was considering using a piece of glass as the top layer, and then one of the matte boards underneath as a mask, in order to keep it flat. Since I'm using one piece of glass, and the negative wont be projected through it, can I use normal glass? Should I shell out for a piece of anti newton ring glass? I'm using a Beseler 23cii enlarger.
