Plastic bag packaging date, marking with 355 UV 3w laser is textured   3w5w UV laser marking plastic bag date, better than ink coding Be responsible! RFH nanosecond solid-state laser marks the date of plastic packaging bags, safe and secure   According to national regulations, the production date must be marked on the plastic packaging bag, otherwise it will be regarded as illegal production. No matter what kind of product it is, important information needs to be sprayed on the packaging to warn consumers. So, how to spray code on the surface of plastic packaging?