There are various types of curl that can be observed in paper. Based on the shape and the principle axis of the curl, it can be defined as CD (cross-machine direction), MD (machine direction) and diagonal. If the curl axis is along the MD direction of paper, it is called CD curl.

May 22, 2018 · Paper curl is critical for many grades of paper, especially copy machine paper, papers that get coated and printed on, and multi-layer paperboard grades. What causes curl? Curl occurs when in-plane layers within a sheet expand or contract at different rates.

Mar 28, 2018 · Paper curl is caused by an excess amount of moisture in the paper. The first step to ensure less paper curl is to store your paper in a cool, dry area. By doing so, you will reduce the amount of moisture and humidity the paper is exposed to.

Paper curl is a complex issue that can cause problems for end users. Learn about the causes and solutions for improving dimensional stability.

Apr 5, 2018 · Run Paper Curl Correction. Paper Curl Overview. This option allows you to select the appropriate paper curl setting in order to prevent your output from curling. This section provides an overview of paper curl, the causes, and why adjustments may be required in order to obtain optimum print output. When paper is exposed to heat, the paper loses ...

Jul 13, 2020 · Paper curl affects the bottom line of the pulp and paper sector across the value chain from mills and converters to end users, such as printing and writing grades, specialty papers and packaging products.

Basically curl occurs when layers within a sheet expand or contract unevenly when they originally started out at equal length. Uneven shrinkage (or expansion) produces a bending moment because of uneven shear forces. The simplest situation is that a sheet is made up of two layers of equal thickness.

This paper explores the phenomenon of paper curl, a prevalent issue in papermaking and printing industries. It begins by outlining fundamental principles about paper, highlighting its behavior in response to changes in humidity, the directional alignment of fibers, and intrinsic stresses from the manufacturing process, which collectively ...

Curl is effect of differential dimensional changes between layers in a sheet. These are produced by different moisture expansions (usually from differences in fiber orientation); the release of differing amounts of internal strain; or from bending.

Printouts may not curl if you print on the back side of the paper. However, be careful of the paper's finish, because the finish of the front and back sides of the paper may differ, depending on the type of paper.