This is a Mosaic with substrate. I used a piece of masonite as the board. The thought is that you can just print the moasic, glue or mortar it to a board/wall/ etc.... then grout it. simple as that. oh, and I hot glued some neodymium magnets to the back of mine to make it into a refrigerator magnet. 1) print mosaic 2) cut a board or select surface to affix mosaic to (i used masonite) 3) mortar or use adhesive to attach mosaic to surface 4) grout I used non sanded white grout to go with the blue pla I used.