On the rare occasion that I want to make a borderless print, this is the method that I use. I have an 11x14 piece of heavy gauge iron that I spray with some 3M repositionable adhesive (like the glue used on sticky notes). I press the paper onto that & expose. The paper peels off nicely with no residue left on the back. I work in a sheetmetal shop, so the iron is accessible to me. I suppose you could use heavy plexiglass, or maybe wood. Must be something that will stay flat though. The largest easel I have is an 11x14. I want to try the 12x16 Foma that J&C sells and plan to use this method with that.