I always lined my baking sheets with aluminum foil but no matter how much cooking spray used everything would stick. Never got any type of meat off with out leaving breading behind or tearing foil stuck to meat. Today figured I'll give parchment paper a try and wow! Nothing stuck to it. Pork chops and chicken cults slipped right off leaving nothing behind. This is great stuff all right but I see bleached or unbleached, does it matter? Is there a difference in brands? Have a corning outlet store close by so bought 2 rolls made by beyond gourmet, 71 sq ft.