Private Label & OEM2 min read

Batch-Code Rub Checks for Coating Bottles and Outer Cartons

Check batch-code durability on both bottles and cartons, and verify that the code remains readable after expected handling.

Updated · NANOLAB Knowledge

Editorial illustration: A Sample Evaluation Scorecard for Private Label Coatings
Editorial illustration

A coating batch code is useful only if it survives long enough to support identification. Bottle and carton codes may use different printing methods and experience different handling, so both require attention.

Define the traceability requirement

Record the code format, location and relationship between bottle, carton and production records. Confirm that a person can distinguish similar characters under ordinary lighting. If scanning is required, include the intended scanner and reading conditions.

Test representative production codes

Use the actual printer, ink, substrate and production settings. Allow the specified setting or curing period before testing. A hand-prepared sample may not represent routine line output.

Separate the checks

  • Initial readability and correctness.
  • Dry handling resistance.
  • Relevant approved wipe or incidental exposure.
  • Readability after storage or distribution assessment.
  • Agreement with the production record.

Investigate loss of readability

Distinguish smearing, abrasion, low contrast and printing errors. For example, a perfectly durable but incorrect code fails traceability just as clearly as a correct code that rubs away. Record failures by packaging component and production condition. Set a release rule that includes both code integrity and record accuracy, then confirm any printer or substrate change against that rule. Keep a retained coded package so a later complaint can be compared with the original production state.

Discuss your private-label coating project. For application and care, use the current instructions for the exact product.