Like copper, tin additionally develops a patina with use, which might vary in shade from battleship grey to virtually completely black. This aesthetic change gained’t have an effect on the efficiency of the cookware, so don’t attempt to scrub it away, otherwise you’ll completely injury the tin. Actually, the patina may even enhance a pan’s efficiency and improve its lifespan. Nonetheless, when you discover the colour change bothersome, you’ll be able to brighten it up a bit by eradicating a few of the floor oxidation.