Jul 20
Why Does Paper Curl, and How Can Curling Be Prevented?
Quick answer: Paper curls when one side changes dimension more than the other. Uneven moisture, heat, coating, printing, fibre orientation and mechanical stress can create that imbalance. Paper is hygroscopic: it exchanges moisture with the surrounding air. Because fibres swell more across their width than along their length, changes are direction-dependent. A sheet also has two faces created…