Identification fabric ingredient is an easy way to burn method. Practice is stitched at the clothing under a wisp of smoke containing warp and weft yarn fabrics, the use of fire to ignite, observe the state of the combustion flame, Wen cloth yarn burning odor after issue, see residue after burning to judge whether the label of the clothing fabric components durability conform to identify the authenticity of the fabric component.
　　First, cotton fiber and hemp fiber
　　Cotton fiber and hemp fiber are just near the flame that is burning, burning quickly, the flame was yellow, take the blue smoke. Both burning odor and burning ashes after difference is that the issue of paper burning smell of cotton, hemp ash smell of burning issue; after combustion, cotton has little powder ashes, was black or gray, hemp is to produce a small amount of white powder ashes.
　　Second, the wool fibers and silk
　　Mao in a fire smoke, burning blistering, burning slow, exudes the coke smell of burning hair, ashes after burning mostly shiny black spherical particles, finger pressure that is broken. Silk shrunk slug a fire burning slow, accompanied by the hiss, emit hair fever burnt smell, form a dark brown after burning pellets ashes, hand twist that is broken.
　　Third, nylon and polyester
　　Nylon generic polyamide fiber, near the flame that quickly huddled melt into a white jelly, melt dripping burning in flames and blistering, no flame burning, difficult to leave the flame continues to burn, emitting a celery flavor, cooling the molten Hazel not easily crush. Polyester scientific name of polyester fiber, easy to ignite, near the flame that is collapsing, black smoke when burned side melting side, yellow flame, emitting aroma, ashes after burning dark brown lumps with your fingers to crush.
　　Fourth, acrylic and polypropylene
　　Acrylic scientific name polyacrylonitrile fiber, near the fire to soften the melting shrinkage, black smoke after the fire, the flame was white, from the flame burn rapidly, emitting a smell of burning flesh bitterness, ashes after burning irregular black lumps, hand twist friable . Polypropylene generic polypropylene fiber, near the flame that is collapsing, flammable, slow burning and black smoke from the fire, the upper yellow flame, the bottom blue, emitting a smell of oil, after burning ashes of hard round light brown particles, easy to hand twist broken.
　　Fifth, polyvinyl alcohol and polyvinyl chloride
　　Villeneuve scientific name polyvinylformal fiber, easy to ignite, near flame melting contraction, the top a little flame, until the fibers are melting into a gel combustion flame becomes large, thick black smoke, emitting bitter smell of incense, burned the remaining black bead-like particles, finger crushed. Scientific name polyvinyl chloride polyvinyl chloride fibers, difficult to burn from the fire is put out, the flame was yellow, the bottom green white smoke, emitting pungent pungent spicy sour after combustion ashes irregular lumps of dark brown, easy to crush your fingers.