Nanosecond UV laser marking production date of yogurt packaging box   Marking the packaging box production date, RFH UV laser is fast   Nanosecond UV laser marking the production date of yogurt packaging box without burning   Yogurt has the effects of preventing high blood pressure and high blood lipids, reducing the risk of colon cancer, as well as beautifying, nourishing the skin, fixing teeth, and nourishing hair. A yogurt after a meal is delicious and relieved. The shelf life of yogurt is from 18 days to 21 days. Each yogurt box has a production date marked by UV laser. Please remember, buy food with UV laser marking on the package. why? Marking on food packaging can be done in two ways: ink jet coding and ultraviolet laser marking.