Last Updated: 2026-09-29
A recalled pallet that cannot be narrowed to one run is a full shipment pulled. To print batch numbers on products properly, treat them as a block of five fields rather than a single string, and settle the reading distance before the layout. Here is the order that works.
Batch Numbers Are a Block, Not a String
A batch number on its own identifies nothing unless something else ties it to a time, a line and a product. The fields belong together because they are read together, usually by someone who was not present at production and has no access to your records. Layout is therefore part of the traceability system, not decoration.
Five Fields to Fit
| Field | What it isolates | Notes |
|---|---|---|
| Batch number | The production group | Your own scheme; keep the length fixed |
| Production date | When the group ran | State the format once and never change it |
| Best before | How long the group sells | Where shelf life applies to the product |
| Line or shift | Which machine and crew | Often one character, and the cheapest field to add |
| Product code | Which saleable item | Ties the block back to an order line |
Where the same data also has to be scanned, the GS1 application identifiers define which identifier carries each field inside the symbol, so the human-readable numbers agree with what the reader returns.
Print It So It Survives
Three things break a printed block after it looks fine on the bench. Contrast: the mark must sit against a lighter area than the ink needs, which on dark or recycled board is a grade question. Handling: a mark still wet when cartons are stacked transfers to the carton behind it. And placement: a block printed across a seam or a wrap edge is unreadable on the pallet even when it was perfect at the head.
Fix the layout with a printed sample on your own pack, then stack, wrap and read it as your customer would. How inkjet printing places droplets explains why porous board and coated board behave differently at the same speed.
Batch number questions
- What is the difference between a batch number and a serial number?
- A batch number is shared by every unit from one production group, so a trace can isolate a group. A serial number is unique to one unit, so a trace can isolate one item. Most cartons need the first and increasingly the second.
- How big should a batch number be?
- Big enough to read where it is read. A block inspected on a bench can be small; one read across a loading bay cannot. Set the height from the reading distance first, then fit the fields inside it.
- Should the batch number be printed or labeled?
- Printed where the surface takes it, because a label can be lost or swapped and the carton cannot. A printed block also cannot be re-labeled downstream without leaving evidence.
K11 Online inkjet printer (Standard Edition)
one frame that prints the whole block:
- Prints up to 120 m/min
- 600dpi HD print accuracy
- 2-12.7mm print height
What to do next
- Read what a batch code must carry, and how it differs from a lot code.
- Send us a carton through our contact page and we print the block on it free of charge, with no commitment.
Need help choosing the right printer?
Talk to our engineers for a free production-line assessment and quotation.
Request a Quote