The black spots on the tin plate sheet usually refer to a significant color abnormality that appears on the surface of the tin plate sheet after these processes are completed. These black spots generally appear in the shape of dark or black spots, vary in size, and may be scattered or concentrated.

In food packaging, the thickness of the tinplate sheet is directly related to the sealing performance and durability of the packaging. Standard tinplate sheets (0.20mm to 0.30mm) are often used in food cans and beverage cans, which can ensure both sealing and packaging strength.