POSCO takes deliveries of the hot-rolled coils (“black coils”) and processes them through annealing and pickling lines, and in Sendzimir mills to obtain desirable thickness. The cold-rolled coils are then given final annealing, before being delivered to a skin pass mill to create a suitable finish, and afterwards to the slitting and cut-to-length lines. Each and every production process is computer-controlled, while metallurgical quality and mechanical properties are tested in state-of-the-art laboratories.