A simple way to identify the composition of clothing fabrics is the combustion method. The practice is to draw a strand of cloth yarn containing warp and weft yarn at the sewing edge of the garment, ignite it with fire, observe the state of the burning flame, smell the odor issued by the burning cloth yarn, see the residue of the burning, so as to determine whether the fabric composition marked on the durability label of the garment matches, in order to identify the authenticity of the fabric composition.

1, Cotton fiber and linen fiber

Cotton fiber and hemp fiber are just near the flame that is burning, burning quickly, the flame is yellow, blue smoke. The difference between the two in the smell of burning and burning ashes is that cotton burning paper odor, hemp burning smell of grass ash; after burning, cotton has very little powder ashes, black or gray, hemp is produced a small amount of gray powder ashes.

2, Wool fiber and silk

Wool smoldering in fire, burning blistering, slow burning speed, emitting burning hair burnt odor, after burning ashes more lustrous black spherical particles, a finger pressure that is broken. Silk fire shrinkage into a doughnut, slow burning speed, accompanied by sizzling sound, emitting hair burning smell, burned into small black-brown spherical ashes, hand twisting that broken.

3, Nylon and polyester

Nylon-synonymous polyamide fiber, near the flame that is quickly curled and melted into a white gel, molten in the flame dripping and blistering, burning without flame, leaving the flame difficult to continue to burn, emitting celery smell, light brown molten material after cooling is not easy to grind. Polyester scientific name polyester fiber, easy to ignite, near the flame that melting shrinkage, burning while melting black smoke, a yellow flame, emitting aromatic odor, after burning ashes for the hard black-brown block, with fingers can be twisted.

4、Acrylic and polypropylene

Acryl, also known as polyacrylonitrile fiber, near the fire softening and melting, black smoke on fire, white flame, rapid combustion from the flame, emitting a pungent smell of burning flesh, the ashes after burning for irregular black hard, easy to twist and break. Polypropylene fiber scientific name, near the flame that is melting shrinkage, flammable, slow burning and black smoke, the upper end of the flame yellow, the lower end of blue, emitting petroleum odor, after burning ashes for hard round light yellow-brown particles, hand twist fragile.

5, Vinylon and chlorine spandex

Vinylon scientific name polyvinyl alcohol formaldehyde fiber, not easy to ignite, near the flame melt shrinkage, burning a little flame at the top, to be fiber are melted into a gel flame becomes large, there is a thick black smoke, emitting bitter smell, after burning the remaining small black bead-like particles, available finger crushing. Polyvinyl chloride fiber, hard to burn, off the fire that is extinguished, the flame is yellow, the lower end of the green white smoke, emitting irritating pungent pungent acidic smell, burning ashes for the black-brown irregular hard block, fingers are not easy to twist.

6, Spandex is named polyurethane fiber, near the fire side of the molten side combustion, burning flame is blue, leaving the fire continues to melt combustion, emitting a special irritating odor, after burning ashes for soft fluffy black ash. Fluorine spandex scientific name of polytetrafluoroethylene fiber, ISO organization called it fluorite fiber, near the flame only melting, difficult to ignite, not burning, the edge of the flame is blue-green carbonization, melting and decomposition, gas toxic, melting material for hard round black beads. Fluorine fiber in the textile industry is often used in the manufacture of high-performance sewing thread.

7, Viscose fiber and copper ammonium fiber

Viscose fiber is flammable, burning quickly, the flame is yellow, emitting the smell of burning paper, after burning ash less, a smooth twisted band of light gray or gray-white fine powder. Copper ammonium fiber commonly known as tiger cotton, near the flame that burns, burning fast, the flame is yellow, emitting ester acid smell, after burning ashes very little, only a small amount of gray-black ash.