Lodge Induction Base Cast Iron Grill Pan, 10.5 Inches, Pre-seasoned skillet is ready-to-use right out of the box. The ribs of the Lodge Pre-Seasoned Cast Iron Square Grill Pan allow fat to drain from food while also searing tantalizing grill marks onto meats, vegetables and paninis. The black patina given to the cookware by the factory seasoning process is, in fact, vegetable oil that has been baked into a piece of cookware that has emerged from an individual sand mold. This coating of oil is a functional application and not a cosmetic application. The cookware is hanging as it rides through the electrostatic sprayer and commercial conveyer ovens at very high temperatures. This allows the oil to penetrate deeply into the pores of the iron which creates an easy release finish.