Ro

Definition and Overview

Ro is a woven fabric that creates ro marks, which open gaps by twisting the warp threads between the plain-weave ground sections, at regular intervals. It is generally arranged with the ro marks running horizontally, but the layout and spacing vary by design. This is the name of the weaving method, not the material name.

The ro marks have a structure in which warp threads cross each other to hold the weft in place, giving stability as a structure even in the open areas. It is woven in a variety of fibers suited to the intended applications, including silk, cotton, linen, rayon, and polyester.

Features

The contrast between the plain-weave sections and the sheer ro marks creates the look of thin horizontal stripes and a light, neat appearance. Depending on the density of the ground sections, the thickness of the thread, and the spacing of the ro marks, the sheerness, firmness, and drape change greatly.

Because it has open areas, it allows air to pass through easily and is a textile that readily gives a cool feeling suitable for hot seasons. On the other hand, the fabric color, skin, and seam allowance may show through, so in tailoring it is checked together with the lining, back skirt support, and underwear color.

Main Applications

Ro is widely used in Japanese clothing, such as summer kimono, haori, and fabrics for obi accessories. It easily combines a formal impression with a cool appearance, and depending on the application, plain, dyed patterns, and woven-pattern-like expressions are chosen.

In Western clothing, it is used for layered styling that takes advantage of its sheerness, as well as for blouses, dresses, skirts, and gowns. Because it is a lightweight textile, it is more suitable for lightweight garments and areas where design is emphasized than for applications that require strong durability on its own.

How to Choose and Handling Notes

When selecting it, check the material, spacing of the ro marks, fabric thickness, sheerness, and density of the ground structure. Even for ro, the feel, drape, and dimensional change after washing differ depending on the thread type and processing, so it is important to check samples under conditions close to the intended application.

Shrinkage and changes in texture from washing vary depending on the material and finish. Follow the care label, and perform washing tests before mass production. In sewing, use needles for lightweight fabrics and fine thread, and prevent thread pulls caused by an awl or coarse needles, as well as seam distortion around the ro marks.

• Before cutting, check the grain direction and the alignment of the ro marks.
• Assume sheerness in the seam allowances and facings, and consider the finishing method.
• Press with a cloth at a temperature suitable for the material, and avoid flattening and shine.

Differences from Similar Terms

Sha is a lightweight textile in which a sheer structure made by a leno weave continues across the entire fabric. In contrast, ro alternates between plain-weave sections and ro marks, so the sheerness appears at intervals and gives a horizontal band-like look.

Gauze is a fabric name that describes a soft, airy texture made with a loose plain weave or similar structure. Ro refers to the structural feature of twisting the warp threads to form ro marks. Voile, meanwhile, is a crisp lightweight fabric made with high-twist threads and is a separate classification from the presence or absence of ro marks.

Frequently Asked Questions

How do you tell ro and sha apart?

Ro is a woven fabric in which ro marks are inserted between plain-weave sections, so the sheer areas tend to appear as lines or bands. Sha is a structure in which the sheer leno weave continues throughout the fabric, resulting in a more uniform, all-over sheerness. However, appearance varies depending on pattern and density, so check with a weave sample.

Can ro be washed at home?

Whether it can be washed depends not on the ro structure itself, but on the type of fiber, dyeing, finish, and sewing specifications. In particular, silk and similar materials may shrink or change texture when washed with water. Always check the care label, and confirm the dimensions and appearance after washing before production.