I was thinking of how to contact proof a roll of 35mm or 120 film. I discounted the idea of finding an old contact frame with foam. Too finicky. Then I remembered they've been making notebook pages for ages. Why not just slip the cut strips of 6-7 frames of 35mm film into them and contact print the whole page in a contact frame? So what if the thin plastic was between the film and the print paper? I'm looking for proper exposure, not perfect sharpness. So I looked up some of those pages to buy some. Then as I read the descriptions, They gave the thickness in mils of the plastic used. Then they gave the thickness of the center layer. CENTER LAYER???. I don't want any center layer. A center layer obviously means you can put 2 strips in the same slot, separated by a center layer. All I want to do is cut my flim, slide it in the slots and put it into my 10x12 frame and contact print it, right in the page. Am I making sense? I don't want a front and a back layer. What am i getting wrong here? Thank you. File this under "dumb questions by advanced amateurs".