Paper over board, commonly known as POB. This construction method is where we cover a piece of board with a sheet of printed and laminated paper for paper over board office supplies.
A full surface layer of glue is used to join the inner liner and outer printed sheet to the board stiffener. The spine size is determined to give the correct space for the ring mechanism. The ring mechanism is then riveted into the cover in the same way as PVC and polypropylene binders.