In the context of tinplate coils , "sealing" typically refers to the process of creating a secure and airtight closure between two components , often involving a lid and a container body. This process is commonly used in the manufacturing of metal containers , such as food cans , beverage cans , and aerosol cans. The goal of sealing is to prevent air , moisture , and contaminants from entering or exiting the container , thereby preserving the quality , fr |