RFH 355nm UV laser non-contact marking chocolate packaging bag production date For chocolate packaging bag marking production date, choose RFH UV laser UV laser non-contact marking to ensure food safety   The most impressive Dove advertisement is the chocolate advertisement shot by Audrey Hepburn. It is elegant and temperamental, and beautiful to the bottom of the heart. Although there is no line, it makes people see the most beautiful appearance of love. In addition to the fragrant and silky smoothness of Defu Chocolate, the production date of the packaging is also non-contact marked with a UV laser, which provides a guarantee for food safety. What is UV laser marking?