An ON-THE-FLY PACKAGE LABEL PRINTING SYSTEM for a variety of packages containing a variety of products. A package handling device receives and guides a web through a package handling device. A printer system associated with the package handling device generates and prints on-the-fly a plurality of different, unique, individual scannable QR codes. Each QR code indicates the weight of the product in the package as indicated by a weighing system and/or indicates the ingredients of the product in each package as indicated by a ingredients device.