Reed Mark
A reed mark is a weaving defect that appears as streak-like variations in shade or density in the warp direction of the fabric, caused by the threading method or condition of the reed used to align the warp yarns during weaving.
Contents6 sections
Definition and how it occurs
Reed mark is an appearance defect caused by the reed used to space the warp yarns evenly and beat in the weft yarns during weaving. Continuous streaks appear in the warp direction due to wear or damage to the reed dents, uneven warp threading, or foreign matter adhering to the reed.
The streaks may look darker or lighter than the surrounding area because of differences in light reflection and yarn density. They may be easier to detect not only by looking at the fabric straight on, but also by changing the angle or holding it up to the light.
Effect on appearance and hand feel
Reed mark gives the fabric surface a vertical-streak appearance, but it is not an intended stripe pattern or weave structure. It can be more noticeable in fine-count yarns, solid fabrics, lustrous fabrics, and light-colored fabrics because of differences in light reflection.
The main issue is appearance, and any effect on hand feel, strength, or breathability depends on the cause and severity. If the streaks are distinct, attention is also needed for left-right differences in the product and how it looks after cutting.
Applications and fabric selection
Reed mark is not a material name or a fabric type, but the name of a defect that can occur in woven fabrics. Therefore, it is not a term that describes properties suitable for a specific item or season. It is an inspection item for a wide range of products that use woven fabrics, such as shirts, blouses, pants, and jackets.
On solid outer fabrics or designs that show a large surface area, even a slight streak may stand out. Before adoption, do not judge by a swatch alone; if necessary, check the appearance on a larger piece of fabric and share the acceptable range with the manufacturer.
- In patterned fabrics or structures with texture, the appearance may be relatively less noticeable.
- Before cutting, check the entire roll and consider whether noticeable areas can be avoided.
- It is important to avoid placing it on visible areas such as the left and right body panels or the front panels.
Handling and sewing precautions
Reed mark does not refer to shrinkage caused by washing. However, if washing or finishing changes the fabric's firmness or luster, the appearance of the streaks may also change. Check the washing instructions and shrinkage rate for each material, and carry out a washing test before mass production.
Reed mark cannot be eliminated by sewing. During cutting, align the grain correctly and check whether the streaks look unnatural at the center or on both sides of the design. Linking inspection records, marking, and cutting instructions helps prevent defects from being included.
Differences from similar terms
Reed mark refers to warp-direction streaks related to the reed. Warp streak is also a streak-like defect that appears in the warp direction, but it may include causes other than the reed, such as differences in warp tension, yarn irregularity, or density differences. It is necessary not to treat the two as the same without checking the cause.
Weft bar refers to bands of shade or density variation that appear in the weft direction, and the direction of appearance is different from reed mark. Also, stripes created by yarn-dyeing or printing are intentional patterns, and should be distinguished from reed mark, which is a weaving defect.
Frequently asked questions
Does reed mark disappear after washing?
Because reed mark is often caused by warp arrangement during weaving or the condition of the reed, it generally does not go away with washing. After washing, changes in luster or shrinkage may make it less noticeable or more noticeable, but adoption decisions should be based on fabric before and after washing.
Are reed mark and warp streak the same?
Both are sometimes treated as streak-like defects in the warp direction, but reed mark is characterized by its relation to the reed. Warp streak can also be caused by differences in warp tension, yarn irregularity, or uneven density. In inspection and corrective measures, check not only the direction of the streak but also the cause.
Should areas with reed mark be avoided when cutting?
It depends on how noticeable it is, the product area, and the customer's quality standards. It is generally best to avoid areas such as the front panels or parts that will be compared left and right. Before cutting, check the roll, share the defect location, and if necessary, consider placing it in less noticeable areas such as facings.
