Like copper, tin additionally develops a patina with use, which may vary in shade from battleship grey to virtually completely black. This aesthetic change received’t have an effect on the efficiency of the cookware, so don’t attempt to scrub it away, otherwise you’ll completely harm the tin. In actual fact, the patina may even enhance a pan’s efficiency and improve its lifespan. Nonetheless, if you happen to discover the colour change bothersome, you possibly can brighten it up a bit by eradicating among the floor oxidation.