Black back strip cold rolled strip processing mainly consider user convenience, the strip after cold rolling by all the soft (annealed), semi-soft, chilled state by customers, because according to user requirements to provide the mechanical properties of the corresponding product , ease of processing into a flat, shaped springs and other metal parts, the user can according to their own requirements for further processing machined parts. Users can choose to use according to its processing requirements. Strip thickness dimension accuracy up to 0.01mm or less, the user needs according to the accuracy requirements into product selection. Our company produces cold-rolled strip thickness is generally 0.2 ~ 2.0mm, width is 660mm less; are rolled strip as raw material, at room temperature after cold rolling mill rolling timber. Cold-rolled strip with surface smooth, flat, high dimensional accuracy and good mechanical properties, etc., products are mostly rolls. Cold rolled high production efficiency, easy to use, is conducive to subsequent processing. So widely used, have gradually replaced the same thickness hot rolled sheet stack. Only a small number of special-purpose cold-rolled steel plate to take a monolithic rolling.