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remove frames. This de-scaled material has a considerably smoother finish with the identical gage tolerances as Hot Roll. The coil is then processed additional by adding a light quantity of oil or other liquid coating that guarantees the finish stays clean. Jetcoatzvb / Colou Rlovers includes more about the purpose of it. Cold Roll Steel is Hot Rolled Pickled and Oiled steel that has been additional processed to receive tighter gauge tolerances. Hot Rolled Pickled and Oiled (HRPO) steel is passed by way of extra rollers at cold temperatures. Learn further on an affiliated portfolio by clicking source. This enables the rolled steel to have a far more exact thickness tolerance. Url contains further about the meaning behind it. Because this further cold rolling procedure tends to make the steel harder and far more brittle. The Steel rolls are soaked in an annealing bath that softens the steel back to commercial good quality..