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The cold rolling process begins with the preparation of hot-rolled coils, which are first cleaned and often pickled to remove any oxide layer before being entered into the cold strip mill. Once in the mill, the coils undergo several passes through a series of rollers, which compress and elongate the material to achieve the desired thickness. The rollers are designed to operate under high pressures, allowing them to impart a significant amount of force on the metal, ensuring a uniform thickness across the strip.