Safe and secure! 532nm green laser marking date on aluminum cans of milk powder   In modern society, families with children are quite concerned about the issue of milk powder. Milk powder is the main intake for the physical development of infants and young children, as an important boost for the growth of young people, and as an auxiliary force for the maintenance of middle-aged and elderly people. There are many in the production process. It is important to pay special attention to all aspects of the aluminum cans of milk powder.