When to stop for a repeater on a food flexible web

On a food flexible package, stop if the repeating spot lands on type or a barcode. Don't pass it if it hits the ingredient list, an allergen line or a barcode. The same spot comes back at a fixed repeat length.

Repeating spot on a food flexible package

On a food flexible package, stop if the repeating spot lands on type or a barcode. Don't pass it if it hits the ingredient list, an allergen line or a barcode. The same spot comes back at a fixed repeat length.

Repeating spot on a food flexible package

First see whether it hit the critical spot

The same spot comes back at a fixed repeat length. Random lint does not repeat that exactly. On a food flexible package, the critical spot is the ingredient list, an allergen line or a barcode. On decoration, with no defect sheet, don't invent a millimetre limit on the spot.

Check against this

What you see Call Don't
The same spot comes back at a fixed repeat length. Stop if the repeating spot lands on type or a barcode. Add ink or pressure just because you saw it
It lands on the ingredient list, an allergen line or a barcode Don't pass this one Wait for the next process to find it
Only on decoration, and there is no defect sheet Keep a sample and confirm Write your own millimetre number

Do this on this pass

  1. Confirm it is a repeater: the same spot comes back at a fixed repeat length.
  2. Measure the repeat and match it to the plate, the blanket or a roller. Don't wipe every unit blindly.
  3. Note the repeat length and which roller it matched.

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Written by

Editorial Team

Print quality & inspection specialists

We write about print quality inspection from the production floor: defects we have seen, standards we work against and equipment we have evaluated.

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