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FLEXIBLE PACKAGING
Printing bar codes on flexible packages is normally an integrated part of the assembly line process. The thermal transfer printer is part of the assembly machine and prints directly onto the substrate, typically a bag or some other type of container. Good examples of this application include the printing of bar codes, part numbers, and item numbers for pre-packaged hardware components like nuts, bolts, screws, etc. and packaging of snacks and other foods, and liquids such as cosmetics.
Wax and wax/resin ribbons are commonly used in this application for printing on plastic bags (polybags) and do not have to be specially designed for this operation. In the case of food packaging using in line direct packaging printers printing on polypropylene or other food and beverage bags, ribbons are specially formulated for compatibility with the substrate as well as printing at high speeds.
Recommendations

Substrate(s): Synthetic Paper, Polybags, Polyethylene, Polypropylene, Polyolefin, Kimdura®, Polyart®, Valeron®

Ribbon(s): TR4085plus™, TRX-50, TRX-55, M260, R300, R510W (White), TR3370 (Opaque White), Signature Series™ Wax, Signature Series™ Wax/Resin, TR4500, M295 Plus, M295C (Silver), M295C (Bright White), R396