The difference between the warp and weft directions of fabrics
(1) If the fabric to be identified has a selvedge, the direction of the yarn parallel to the selvage is the warp direction, and the other direction is the weft direction.
(2) The sizing is in the direction of the warp yarns, and the unsizing is in the direction of the weft yarns.
(3) Generally, the denser fabric is in the warp direction, and the smaller fabric density is in the weft direction.
(4) For fabrics with obvious reed marks, the direction of the reed marks is the warp direction.
(5) For half-thread fabrics, usually the strand direction is the warp direction and the single yarn direction is the weft direction.
(6) If the yarns of the single yarn fabric are twisted at different times, the Z twist direction is the warp direction and the S twist direction is the weft direction.
(7) If the warp and weft yarn characteristics, twist direction, and twist degree of the fabric are not very different, the yarn will be uniform and shiny in the warp direction.
(8) If the yarn twists of the fabric are different, the twist will be greater in the warp direction and the twist will be smaller in the weft direction.
(9) For towel-like fabrics, the direction of the yarn that generates loops is the warp direction, and the direction of the yarn that does not generate loops is the weft direction.
(10), strip fabric, the strip direction is usually in the warp direction.
(11) If the fabric has a system of yarns with multiple different characteristics, this direction is the warp direction.
(12) For leno fabrics, the direction of twisted yarns is the warp direction, and the direction of untwisted yarns is the weft direction.
(13) In interwoven fabrics of different raw materials, generally cotton and wool or cotton and linen interwoven fabrics, cotton is the warp yarn; in wool and silk interwoven fabrics, silk is the warp yarn; in wool and silk-cotton interwoven fabrics, silk and cotton are warp yarns ; In the interweaving of natural silk and spun silk, the natural thread is the warp yarn; in the interweaving of natural silk and artificial silk, the natural silk is the warp yarn. Since fabrics have a wide range of uses and varieties, and the requirements for fabric raw materials and organizational structures are also diverse, the judgment must be based on the specific conditions of the fabric.
The difference between the front and back sides of fabrics
(1) Generally, the pattern and color on the front side of fabrics are clearer and more beautiful than those on the back side.
(2) For fabrics with a striped appearance and color-matching patterned fabrics, the front pattern must be clear and pleasing to the eye.
(3), convex strips and concave and convex fabrics, the front side is tight and delicate, with stripes or patterned ridges; while the reverse side is rough, with longer floating lines.
(4) Fleece fabric: Single-sided fleece fabric, the fleece side is the front. For double-sided raised fabrics, the smooth and neat side of the pile is the front of the fabric.
(5) Observe the edge of the fabric. The smooth and neat side of the edge is the front of the fabric.
(6) For double-layer or multi-layer fabrics, if the warp and weft densities of the front and back sides are different, the front side will generally have a higher density or the front side will be made of better materials.
(7) Leno fabric: The side with clear lines and prominent twisted warps is the front.
(8) Towel fabric: The side with higher terry density is the front side.
(9) Printed fabric: The side with clear pattern and brighter color is the front.
(10) Whole piece of fabric: Except for export products, those with instructions (trademarks) and factory inspection stamps are usually on the reverse side. For most fabrics, there are obvious differences between the front and back sides, but there are also many fabrics whose front and back sides are very similar and can be used on both sides. Therefore, it is not necessary to distinguish the front and back sides of such fabrics.
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