1. Sensory identification methods sensory identification methods mainly include eye seeing, hand touching, ear hearing and nose smelling. First, preliminarily distinguish the categories of fibers or fabrics, then further judge the types of raw materials through the sensory characteristics of fibers in fabrics, and finally make the final judgment according to the sensory characteristics of fabrics. If you are not sure about the judgment, you can use other methods to verify it.  
2. Combustion identification method different textile fabrics have different combustion characteristics. Cotton fiber burns in case of fire. The combustion speed is fast, producing yellow flame and smell. Hemp fiber burns fast, softens, does not melt and does not shrink. Wool does not burn immediately when it comes into contact with the flame. It curls first, then smokes, and then the fiber bubbles and burns. Silk burns slowly, melts and curls, shrinks into a ball when burning, and has the smell of burning hair. The burning behavior of viscose fiber is basically similar to that of cotton, but the burning speed of viscose fiber is slightly faster and the ash is less than that of cotton fiber. Acetate fiber burns fast with sparks. It melts and burns at the same time. It has a pungent sour taste when burning.