March 21 , 2026
When it comes to tinplate, the difference between First class and secondary class comes down to surface quality. First class tinplate is designed for direct coating and printing across the entire sheet, with strict limits on defects—no pinholes, no out-of-spec thickness, and no visible dents, wrinkles, or rust that could affect performance. Secondary-class tinplate, on the other hand, allows for m...
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