When to stop for a screen clash on a food web

On a food web, if a screen clash shows in the main image, stop and change the screen angle. Do not print the whole lot. If it hits the ingredient list, an allergen, or a barcode, do not release it.

Screen clash on a food web

On a food web, if a screen clash shows in the main image, stop and change the screen angle. Do not print the whole lot. If it hits the ingredient list, an allergen, or a barcode, do not release it.

Screen clash on a food web

Look first at whether it hit a critical spot

A regular pattern appears in the halftone. Mottling does not have that regular angle. On a food web, the critical spots are the ingredient list, an allergen, or a barcode. If the decorative area has no hickey chart, do not invent a millimetre number on the spot.

Side by side

What you see Call Do not
A regular pattern in the halftone. In the main image, stop and change the angle. Do not run the whole lot. Add ink or impression the moment you see it
It lands on the ingredient list, an allergen, or a barcode This one cannot be released Wait for the next process to find it
Only on decoration, and there is no hickey chart Keep a sample and confirm Write your own millimetre number

Do this first on this pass

  1. Confirm it is a screen clash: a regular pattern in the halftone.
  2. Check screen angles or screen ruling. Do not wash it as a dirty plate.
  3. Note each color's angle and ruling.

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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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