Two dimensional bar code has the characteristics of large storage capacity, high security, high tracking, strong resistance to damage, large backup and low cost, which is very suitable for data table, security, tracking, license, inventory, data backup and so on. This paper mainly explains the application of laser marking two-dimensional code tracing system. A product to build a complete data traceability system, to complete two goals, one is the internal quality management traceability, the other is the external product traceability.
A product to build a complete data traceability system, to complete two goals, one is the internal quality management traceability, the other is the external product traceability.
Internal quality traceability
    The internal quality traceability can trace the manufacturing batch number, supplier, processing steps, defect rate and other information. Just use the laser marking machine to mark the outbound products, and you can view them according to the database system. Once which batch of products have problems and which supplier does not supply standard, we can simply and clearly grasp the detailed information.
After the finished products are processed, the products are marked with secondary laser to identify the unique batch number, tamper proof and permanent two-dimensional code. Then, the products are entered into the database system according to the visual identification system, and combined with the external traceability system.
External product traceability

    External product traceability is mainly to facilitate customers to scan the QR code to check the authenticity of goods, master the origin of products, production date and other more detailed information. At present, in the food, medical, industrial electronics and other industries, laser marking two-dimensional code traceability system is widely used.