I had luck embedding prints in resin two ways.
- I spread a thin coat of resin on fabric, let set, cut out the design, and coated both sides with resin to finish. Rigid enough to use in jewelry, would probably work with paper.
- use a mold or frame (like a cookie cutter) sealed to packing tape. Pour in a little resin, add print, top with more resin. Rigidity depends on thickness; can use color for base (let set before adding print), clear resin on top.
But maybe these are something else entirely.