I use the unscented dryer sheets from Seventh Generation. You can tear off a whole sheet or a half sheet. Half sheet will go through at least 2 large loads and another medium load. They are already perforated for ventilation I guess. I like to use these for scrappy bindings. The sheet are 6" wide and can be split in half for a 3" scrap binding like adding machine tape or register paper. They curl up so I just smooth them out and place under or in a book. My favorite for paper foundation is cheap tissue paper for gift wrapping. Usually comes in 20x30" sheets so that gives you 6 10" layer cakes.