How can tinplate be identified?
The quality of tinplate is related to the final use.
Mainly to see whether the surface is smooth, whether there are holes in the surface, there are no wave edges, scratches, tin is enough, the size is not in tolerance Wai?. Wait a lot. Specific problems are analyzed in detail, and there are many aspects of assessing quality problems, and so on.
If the food is ready to eat food grade, dressed in non food is to chemical grade on it.
