Old coarse cloth, also known as old soil cloth, is a kind of handmade product that has been used by the folk generation for thousands of years. The weaving process of hand-woven old coarse cloth is extremely complicated. From cotton spinning to upper weaving, it has to go through 72 large and small processes, the main process is summarized as 15: ginning → embossing → spinning → pulp line → 屯Line → drop line → warp line → brush line → do comprehensive → é—¯æ¼ â†’ æŽ comprehensive → crane machine → weaving → machine. "Old coarse cloth" has the following advantages: A: Green natural, environmentally friendly and healthy: no pesticides and chemical dyes are used. The textiles are free of chemical heavy metal ions such as formaldehyde and azo, and are truly green ecological textile treasures. From planting to hand-woven products, no pesticides or chemical dyes are used, which is the most suitable personal textile for the human body! B: soft texture, warm in winter and cool in summer: excellent in permeability, can effectively absorb sweat and micro-sweat on human skin, so that body temperature can quickly return to normal, and truly achieve the effects of ventilation and sweat absorption. C: anti-static, anti-mite and anti-itch: PH value is acidic, no irritation to the skin, in line with environmental and health requirements D: It is not easy to pick up, no curling: Due to the thick and thick lines, the surface forms numerous massage points that have unexpected massage effects on the human body. How do you tell if the coarse cloth is good or bad? The quality of the coarse cloth product is determined by several factors: 1. Raw materials The high-grade coarse cloth is made of pure cotton 21S ply as raw material, and the coarse cloth is generally used for recycled cotton, 10S is used as raw material, and the quality of warp and weft are inconsistent. 2, the density of the cloth The highest density of high-grade coarse cloth is 37*37, sheets (200*200), and the weight is in the range of 2-2.5 kg. The density of low-grade coarse cloth is generally around 34*34, and the weight is between 1.4-1.8 kg. Filmbase samrt film can paste on any smooth surface, it is clear when power on and opaque when power off. Smart Glass film is also called Switchable Film,Switchable Films,Custom Switchable Film,PDLC Film. There are three generations of smart glass in the market. Generations of smart glass are determined by manufacturing technologies of liquid crystal (LC) Switchable Film. In the industry, independent patented technologies are usually used to classify generations of products. For about three decades, there are only three independent patents in the field of LC switchable film. LC switchable film is also called liquid crystal film, LC film, Smart Film, Privacy Film, intelligent film, Electrochromic Film, electric film, electronic film, frosted film, pdlc film, PNLC Film, reverse film, reverse pdlc, reverse pdlc film, pdlc reverse film, opaque film; switchable glass, Privacy Glass, Switchable Privacy Glass , smart glass, electrochromic glass, Electric Glass, electronic glass, frosted glass, pdlc glass, pnlc glass, reverse glass, reverse pdlc glass, pdlc reverse glass, opaque glass or PDLC film. Switchable Film,Switchable Films,Custom Switchable Film,PDLC Film Shenzhen Filmbase Technology Co., Ltd. , https://www.globalfilmbase.com