Pleating

Definition and Overview

Pleating is a finishing process that folds woven or knitted textiles and uses heat, pressure, chemicals, or similar methods to give them a pleated shape. Typical forms include accordion pleats, which are folded in the same direction, and box pleats, in which the fold peaks alternate directions.

It does not refer to the textile structure or pattern itself, but rather to a type of post-processing or secondary processing that adds three-dimensional folds to a textile or product. The width, direction, depth, and shape of the pleats change the product’s appearance and range of motion.

Features and Expression

Regular pleats create light and shadow, and their appearance changes with movement from walking or wind. Vertical pleats tend to create a neat impression, while horizontal or modified pleats are suited to more decorative expression.

Because there is extra room between the folds, pleats can provide ease of movement compared with a flat dimension. However, the stretch-like feel and drape of pleats vary depending on the material, pleat design, and processing method, and are different from stretch provided by elastic band or similar materials.

In processes that set the shape with heat, polyester and other thermoplastic materials generally tend to retain the shape well. On the other hand, in natural fibers and regenerated fibers, pleat retention varies greatly depending on processing conditions and aftertreatment.

Main Applications

Pleats are used in pleated skirts, dresses, blouses, pants, and also in items such as dresses and stage costumes where movement and three-dimensionality are desired. They may also be used in partial details such as sleeves, collars, hems, and ruffle-like accents.

Lightweight materials with a soft drape are suited to airy expressions, while slightly firm materials are suited to expressions that show the outline of the pleats. Because the warmth, bulk, and height differences vary depending on the thickness of the material and the amount of pleating, designs are made to suit the purpose for both spring/summer and autumn/winter use.

Selection and Handling Notes

During planning, in addition to the type and retention of the pleats, confirm the material, fabric weight, sheerness, and drape. Since the required fabric width and consumption increase when the pleats are opened out, pattern making and marking should consider the expanded dimensions and pattern direction.

During cutting and sewing, basting or temporary fixing is used so the pleats do not shift, and the pleat direction and appearance are controlled at the joining positions. At areas where thickness overlaps, seam allowance finishing and seam step differences should also be checked.

Washing, moisture, friction, and heat may weaken the pleats or distort their shape. Ironing and steaming may flatten pleats, so follow the care label for each product and the handling conditions of the processing supplier. It is important to conduct wash tests in advance and confirm shrinkage rate and shape change.

• Check fabric consumption based on the required opened dimensions, not the finished width of the folded pleats.
• For patterned fabrics, confirm with a sample because the pattern may be interrupted or appear differently at the pleat fold positions.
• Because dimensional changes may occur after processing, carry out specification control including the processing steps.

Differences from Similar Terms

Pleats generally refer to folds made by folding the textile, while gathers refer to fine folds made by drawing the textile together with thread. Pleats more easily show the regularity of fold lines, while gathers express a soft fullness created by the amount of gathering.

Plating mainly refers to a knitting structure and knitting technique in which different yarns are knit on the front and back of knitwear. The name is similar, but it is different from pleating, which adds folds to a textile.

Frequently Asked Questions