Material difference between webbing, ribbon or ribbon. Generally, it is simple and easy to use the combustion method to identify fibers, but it is not easy to judge the blended products. It is necessary to extract one yarn from each of the warp and weft directions (ie, the straight and horizontal directions) and burn them separately. Disassemble several warp and weft yarns of two unknown types of webbing, burn them with lighters, and observe some physical phenomena during the burning process to determine the raw materials of warp and weft yarns. When burning, observe the flame, the melting situation and the odor emitted, and the condition of the ash after burning.

Both cotton fibers and hemp fibers are flammable when they are close to the flame, burning rapidly, the flame is yellow, and blue smoke is emitted. The difference between the odors emitted by the two during combustion and the ashes after burning is that the burning of cotton gives off the smell of paper, and the burning of hemp gives off the smell of plant ash; after burning, cotton has very little powder ash, which is black or gray, while hemp produces a small amount of off-white powder ash.
The scientific name of vinylon is polyvinyl formal fiber, which is not easy to ignite, melts and shrinks near the flame, and there is a little flame at the top when burning. When the fiber is melted into a jelly-like flame, the flame becomes larger, there is thick black smoke, and it emits a bitter odor. After burning, it remains black. Small bead-like particles that can be crushed with fingers.