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How to add moisture back into paper, eliminating lay-flat problems

Paper that loses moisture in coating or drying will curl on rewind. Put the water back in the web before the roll is made.

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Plant-floor overview. Unlock below for the full converter checklist.

Making paper-backed pressure-sensitive materials pulls moisture out of the web. That is typical of a release-coated liner. If you combine webs without putting that moisture back, the liner expands later as it takes water from the room. Non-paper face stocks cannot expand with it. The result is curl. Very dry paper also statics, shrinks, and will not die-cut cleanly.

Paper in equilibrium with a normal plant is about 6% moisture by weight. For most converting, 5% is a good target. A few processes want more. At that level you get cleaner die cutting, higher speed, and less scrap.

What's in this guide

  • Slow methods that still get used
  • Putting water on the surface
  • Steam into the sheet

Longer plant training (5–10 min)

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General plant guidance only — not a substitute for your process, SDS/TDS, or line trials. Call 800-249-0337 to match a grade.

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