The signatures are folded from regular white text paper. The problem is that I punched the holes in the covers with a regular office-type hole punch and they are too big. I wondered if maybe larger holes would help it lie flat better, but it just made the covers want to slide around too much. Even the stitching looks a bit sloppy on this. I'm still struggling a bit with the 2-needle coptic binding.
Oh well, I did say some of these books would just be a learning experience. This was certainly that. I might try the idea again later. The size would be handy for a pocket or purse.