Its function is to adjust the corresponding coefficient according to different fabrics. The method is to reduce the tension coefficient for thin fabrics, and to increase the tension coefficient for thick fabrics, so as to achieve the sewing effect.
There are quite a lot of sewing threads on the market. It would be a big mistake to decide which kind of sewing thread to use just based on the color. Generally, 402 or 602 sewing threads are more suitable for household sewing machines, so you should consider it when choosing sewing threads. Model and color, elastic cloth should choose a special type of sewing thread, which can effectively prevent the occurrence of thread interruption during the sewing process.
There are two kinds of backing paper, one is water-soluble, and the other is special silk backing. The function of the backing paper is to prevent the tension of the fabric from being increased during sewing and cutting. It can make cutting and sewing easy and simple, especially It is for stretch cloth.
