The production method of the wholesale coloration coated aluminum coil is incredibly strict. Handiest aluminum coil want a whole lot of treatment before they're coiled. Then how to test the fine of the coloration coated aluminum coil? 1. Physical check Bodily testing is vital to test that the paint has been applied and cured nicely to carry out nicely for the duration of quit use. 2. Visible inspection Visible inspection is crucial to affirm the absence of unacceptable visual defects, as cov...