First, after designing it on the computer, print it out in color (just do it yourself with PHOTO and go to Nitu. Find some plastic bags)

Secondly, just stick the mold with a laminator.

The first floor of Electronic City sells printed cardboard and laminating machine. Look at the equipment selling peritoneum and color printing on the first floor and you will know what to do. Just buy a second-hand one, and you can change it often in the future.