resistant to penetration by grease or oil or wax; as, greaseproof wrapping paper.

Paper free of mechanical pulp, highly resistant to grease. Mainly used for the wrapping of greasy products.

A grease & fat resistant paper. Also Glassine (Least resistant), Vegetable Parchment(more resistant than Glassine, whiter than Greaseproof) Greaseproof (most resistant)