Maybe it was dry paper as well? I don't use RI under my prints. I adhere a very thin layer of white fondant icing (like #2 on a pasta roller), and then attach the edible print to that. I dry them print side down for about 15-20 mins so the prints don't curl up, then right side up and let dry overnight. You can bag them up in 24 hours start to finish, way less drying time. I use corn syrup or piping gel, whatever is handy.