When I would print out tech specs for Transformers, I used elmers white glue.
I would also use comic backing boards for strength. I put the glue on the board, then used a cutout of the tech with a 1/2 inch (1 cm) border. I placed the tech on the glued area. Then used a soda can to roll it as flat as possible. Be mindful that the excess glue that might get on the can does not accidently roll onto the paper.