1-1 The baking trays has a piece of oil paper, a transparent film with protective oil on it. It looks a bit dirty, like used. So when you see it, don't think that the product is damaged or used. you just need to tear open the film and wipe it off with a cloth.
1-2 Cooking surface made of iron. Iron will turn black after use.
1-3 Please apply a layer of cooking oil after use, otherwise it may rust.