Beyond logos and colour, custom-printed food packaging needs a reliable way to identify when it was made, which artwork version was used and which production batch it belongs to. A code area that is too small becomes unreadable; a coated surface may reject ink applied later; and an artwork version that does not match the records can unnecessarily widen the stock affected by an investigation. This guide provides a practical framework for planning static print and variable data across burger boxes, cups, greaseproof paper, kraft bags and other custom food packaging. Mandatory food information differs by product and market, so final wording should be approved by the responsible food business and, where appropriate, a regulatory specialist.
Map the traceability chain first
Traceability is more than printing a number on a carton. Approved artwork, board or paper batch, production date, machine or line, case label, pallet record and customer shipment are parts of the same chain. The code on the physical pack must connect reliably to at least one record that leads through this chain.
Write down the questions a complaint or quality incident must answer: Which artwork revision was used, how much was produced, which cases contained it and which shipments received those cases? If one reference cannot reach these answers, the code structure or record flow needs improvement.
- Approved artwork and revision number
- Material and production batch
- Case, pallet and shipment link
- Record owner and retention period
Separate static print from variable data
Logos, product names, instructions and stable contact details normally remain in the master artwork. Batch numbers and production, use-by or best-before dates may change by order or filling run and often need a separate coding step. The packaging converter's batch code and the food filler's product code are not interchangeable; define the purpose and owner of each.
Show the variable area in the artwork with sample text and mark it clearly as a placeholder. Prevent it from being mistaken for live data in production files. The technical brief and order approval should state which information is added by the packaging producer and which is applied at the restaurant or filling line.
- Stable text retained in approved artwork
- Variable fields shown as explicit placeholders
- Separate packaging and food batch references
- Defined coding location, owner and equipment
Design the code area for legibility and equipment access
The coding zone must be wide enough, flat and accessible for the selected printer, label or marking method. Folds, locks, glue zones, busy graphics, dark backgrounds and grease-contact surfaces can all reduce legibility. Consider how the erected box is presented and from which direction it reaches the coding head.
Test character height, line count, spacing and contrast using the longest realistic data—not a convenient short date. Where human-readable text and a barcode or two-dimensional code appear together, both should lead to the same record and remain clear of one another.
- Flat, accessible, high-contrast coding zone
- Safe distance from folds, locks and glue
- Size test with the longest realistic data
- Visibility and printer access on the erected pack
Validate surface, ink and drying compatibility on samples
Coated board, varnish, film lamination, PE barriers and grease-resistant treatments can react differently to the same coding ink. A mark that looks readable at first may rub off after condensation, heat, grease contact or handling. Test the coding method on the finished surface specified for the order rather than on plain paper alone.
Record density, smudging, drying time, scratch resistance and legibility after the planned holding period. For thermal labels, assess adhesion; for laser or inkjet, check surface compatibility and line speed. Retaining the equipment model, consumable and setting with the result makes repeat orders more consistent.
- Coding trial on the finished packaging surface
- Rub, moisture, heat and grease checks
- Drying time assessed with line speed
- Equipment, consumable and setting record
Match artwork revision to stock and dispatch records
A change to a phone number, allergen statement, branch detail, language or campaign can leave several printed versions of one item in storage. Product name alone cannot distinguish the correct stock. Give every artwork a unique revision code and carry it through the purchase order, case label, warehouse record and dispatch document.
If a visible revision mark is not appropriate on the consumer pack, tracking may rely on the outer case or inner-bundle label. Where the pack must remain identifiable after removal from its case, a small controlled mark can help. Decide deliberately whether customers see it, considering brand design and information security.
- Unique revision code for every artwork
- One reference across order, case, stock and dispatch
- Quarantine or run-out plan for obsolete versions
- Written approval of visible or hidden coding
Finish acceptance with a mock recall exercise
During production acceptance, sample codes from different cases and pallets. Confirm that the data is correct, human-readable, scannable where applicable and connected to the production record. Define acceptance limits and segregation rules for missing, faint, duplicated or incorrect codes before the run begins.
Complete a desk-based traceability exercise: start with a random pack code and work back to the production record, remaining stock and shipped customers. The purpose is not only to find a problem but to narrow the affected scope quickly and accurately. Traceability then becomes an active quality and operations tool rather than a code sitting on the pack.
- Code samples from several cases and pallets
- Visual and scanner verification
- Backward trace from record to stock and shipment
- Exercise time, gaps and corrective actions