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 minor surface imperfections such as scratches, oil marks, or burrs, which makes it unsuitable for high-quality printing.
At Guangdong Sihai, we specialize in manufacturing empty aerosol cans and have done so for 28 years. To ensure the highest level of safety and reliability, we use only first class tinplate for all our aerosol tin cans. This commitment allows us to deliver cans that meet the most demanding standards for coating, printing, and long-term performance. If you have any needs, please feel free to inquiry.