Abstract
The majority of metals are processed into sheet and their commercial success in this form depends upon their mechanical properties, their surface finish, the accuracy of gauge, and the preciseness of the shape. For some domestic applications, such as aluminium baking foil, the surface finish and properties sell the product and the precision of shape and gauge are not of primary importance. However, for many uses the strip may not be commercially viable unless all the above factors are perfect. Typical examples would include steel or aluminium strip that is subsequently embossed or painted and copper or bronze strip produced for certain electrical-contact applications. It is also relevant to note at this stage that the requirement for good shape has become more stringent because of the increased use of light-gauge, wide strip for roll forming, roofing, and cladding in the aluminium industry and this has stimulated a more rapid development in that field than elsewhere.
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