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TISSUE
Tissue is a textile fabric consisting of at least two thread systems, warp and weft, which cross each other at an angle of exactly or approximately 90° when viewed on the fabric surface.
Each of the two systems can be made up of several types of warp or weft (e.g. basic, pile and filling warp / basic, binding and filling weft). The warp threads run in the longitudinal direction of the fabric, parallel to the edge of the fabric, and the weft threads run in the transverse direction, parallel to the edge of the fabric.
The threads are mainly connected to the fabric by friction. In order for a fabric to be sufficiently non-slip, the warp and weft threads usually have to be woven relatively densely. That is why, with a few exceptions, the fabrics have a coherent appearance.
To sew fabric, positive displacement needles are always used and never a cutting point.
LEATHER, TARPS & FOILS
Leather, imitation leather, tarps and foils are closed textiles that have to be ""pierced"" for sewing. This is why needles with cutting tips are usually used for this.
Cutting tips penetrate the material much more easily than displacement tips and thus counteract resistance and heating.
Cutting points should never be used on woven and knitted fabrics, otherwise the threads can be cut, causing holes.
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