How to distinguish the latitude and longitude of the fabric

If the fabric to be identified has a cloth edge, the direction of the yarn parallel to the edge of the cloth is the warp direction and the other side is the weft direction.
The direction of the warp is sizing, and the direction of the weft is not sizing.
The fabric has a cloth edge, the direction of the cloth is the warp direction, the vertical cloth edge is the weft direction.
The scar of the obvious fabric, the direction of the scar is the warp.
For half-line fabrics, the direction of the strands is usually the warp direction, and the direction of the single yarn is the weft direction.
If the yarn forming of the single yarn fabric is different, the Z direction is the warp direction and the S direction is the weft direction.
If the warp and weft yarns, the twist direction and the twist of the fabric are not much different, the yarn is evenly dried and the gloss is good.
If the yarn twist of the fabric is different, the majority of the twist is the warp direction, and the twist is small.
In the interweaving of different raw materials, generally cotton or cotton interwoven fabric, cotton is warp yarn; filament interlaced, silk is warp yarn; wool wool interwoven, silk and cotton are warp yarn; natural silk and silk In the silk interlace, the natural thread is warp yarn; in the interlacing of natural silk and rayon, the natural yarn is warp yarn.