Washi Thread
Washi thread is a material made by processing washi into a thread form, such as by cutting washi into thin strips, or a thread combined with other fibers, and it is used to bring a smooth hand feel and a paper-derived appearance to textiles and knits.
Contents5 sections
Definition and Overview
Washi thread is made by processing washi into a form that can be treated as thread, such as by cutting washi into thin strips and twisting it. In addition to being used on its own, there are also threads made by blending or ply-twisting it with cotton, linen, polyester, and other fibers to adjust strength, ease of knitting, and texture.
“Washi” is a broad term referring to paper itself, and it is not necessarily synonymous with washi thread for apparel. Also, paper yarn may be made from paper other than washi, so it is important to check the raw material, blend ratio, and thread structure in the specification sheet.
Features and Appearance
Fabrics and knits made with washi thread are generally characterized by a dry, crisp touch, lightness, and a simple matte surface. While they easily express a cool feeling similar to linen, the stiffness or softness varies greatly depending on the paper quality of the raw material, twist, weave or knit structure, and the fibers blended with it.
In designs that allow air to pass easily between fibers, breathability is easier to achieve, making them suitable for uses where you want to reduce stuffiness. However, performance such as breathability, moisture absorption, and strength cannot be judged from the name washi thread alone. Check test values and fabric samples.
- Uneven effects such as fuzziness or neps may appear.
- Properties in wet conditions and resistance to friction vary depending on the type of paper, processing, and blended materials.
- Dyeability and color appearance also change depending on the material composition, so confirmation with color swatches is necessary.
Main Uses and Seasons
Taking advantage of its cool feel and natural appearance, it is used for spring and summer knits, cardigans, pullovers, shirts, blouses, dresses, and more. For light to medium-weight materials, sheerness and the visibility of the knit structure are also designed as part of the look.
In relatively firm knitted or woven fabrics, it is also used for fashion accessories such as hats, bags, and pouches. For items that come into direct contact with the skin, check not only the proportion of washi thread but also the blended fibers, fabric density, and the feel of seam allowances and edges against the skin.
How to Choose and Handling Precautions
When selecting, check not only the blend ratio of washi thread but also whether it is single yarn or plied yarn, the twist, fabric weight, structure, and finishing process. It is important to make prototypes in a state close to the product specifications required for strength, stretch, and drape, and to conduct wear tests and laundry tests.
Changes in shrinkage, dimensions, and stiffness caused by moisture vary depending on the material design. Before mass production, carry out laundry tests on the fabric or product, and set the care label based on the test results and the manufacturer's specified handling instructions. It is also necessary to check the process of shaping the item and hanging it to dry after washing.
In sewing, excessive thread tension or needle holes that are too fine can lead to surface damage, puckering, and noticeable seams. Check in advance for fraying at the edges, seam strength, and compatibility with needles and sewing thread, and consider seam finishing and interlining as needed.
Frequently Asked Questions
What is the difference between washi thread and linen thread?
Washi thread is a material made by processing paper into a thread form, whereas linen thread is made by spinning bast fibers taken from plant stems and other sources, so the raw materials and thread construction are different. Both can create a crisp impression, but the touch, fuzz, strength, and changes after washing differ depending on the material design. Compare the blend ratio and test results when selecting.
Can fabrics made with washi thread be machine-washed at home?
Whether home washing is possible depends on the type of washi thread, blended materials, knit or weave structure, and dyeing or finishing processes. Even if washi thread is used, some items can be washed while others specify hand washing or dry cleaning. It is necessary to conduct product washing tests during the planning stage and follow the care label based on the results.
What should you watch out for when sewing washi thread?
First, do a trial sewing to check needle holes, the visibility of seams, thread breakage, seam shrinkage, and fraying at the edges. If the fabric is firm or has a coarse structure, strong presser-foot pressure or inappropriate needle and thread tension can damage the surface. Perform sewing tests under the same conditions as mass production and decide including seam finishing.
