How to Add Batch Codes and Dates to a Packaging Line
ZONESUN Packaging Knowledge Center
A practical guide to selecting and positioning coding equipment on bottle, pouch, carton and label packaging lines.
Begin with the code and substrate
Coding equipment should be selected from the information to be printed and the surface receiving it. A date or batch number on a bottle, flexible film, carton or label may require a different technology. Substrate color, texture, coating and curvature affect legibility and adhesion.
Inkjet coding
Inkjet systems can print variable information without contacting the package. Print distance, ink compatibility, line speed and the operating environment should be reviewed. The package must pass the printhead in a stable and repeatable position.
Laser coding
Laser systems mark compatible materials without ink. Material response, contrast, required marking area and safety enclosure needs must be evaluated. A sample-marking test is important because visually similar plastics or coatings can react differently.
Ribbon and contact coding
Ribbon coders are often integrated with flexible packaging equipment to print on film before the pack is formed. The available print area, intermittent or continuous film motion and ribbon compatibility determine the correct setup.
Position in the line
Coding can occur before filling, during film handling, after sealing or on an applied label. The best position provides a flat, controlled surface and enough time for a clear mark. Sensors and encoder signals may be needed to coordinate print timing with variable conveyor speed.
Information for selection
Provide sample packages, substrate details, code content, maximum print area, line speed, conveyor direction and desired print location. Include photos or video of the existing line if coding will be added later. ZONESUN can review integration with labeling, filling or sealing equipment.
Quick decision guide
| Decision area | What to confirm | Why it matters |
|---|---|---|
| Inkjet | Variable codes on suitable substrates | Non-contact printing for many line applications |
| Laser | Permanent marking on compatible materials | Requires substrate and safety review |
| Ribbon/contact | Film or label applications suited to contact coding | Depends on material, position and machine timing |
| Integration | Trigger, speed, print distance and location | Ensures readable codes during production |
Next step
Send your product, container or package samples, target output, voltage and required automation level. ZONESUN can review the full process and recommend equipment that fits the application. Visit ZONESUNPACK Contact Us to submit your project details.