To test whether a sweater is made of natural fibers, you can use the following simple methods:

1. Burning Test: Take a small amount of fiber and ignite it. Natural fibers (cotton, linen, wool, cashmere) burn like paper or hair, giving off a smell of grass or burnt hair, and the ashes are brittle. Synthetic fibers (polyester, acrylic) melt and shrink when burning, emitting a pungent plastic smell, and the ashes are hard and clumpy.

2. Touch and Visual Inspection: Cotton and linen feel soft with natural wrinkles; wool and cashmere have a warm touch, good elasticity, and tend to form pills easily; synthetic fibers are relatively smooth, overly elastic, and have a rather glaring luster.

3. Water Absorption Test: Natural fibers have strong water absorption and water droplets quickly penetrate after being dropped; synthetic fibers absorb water slowly and water droplets tend to roll off easily.

4. Label Verification: Check the ingredient labels. Those marked with "100% cotton/wool/angora" are natural fibers, while those containing "polyester/nylon" are synthetic fibers.

Combining multiple methods can lead to more accurate judgments. The combustion method and label verification are particularly intuitive.

JMSWEATER is a over 17 years professional sweater manufacturer that various sweaters are available to be customized as your requirements. 

Knitwear ranging from 1.5-18GG in jacquard, intarsia, flat bed knitting, circular knitting, hand knit and crochet. 

Various kinds of add-on process are available, thousands of material yarn offered with cashmere, merino wool, cotton, viscose, nylon, alpaca, linen, mohair etc. 

To know more of our procedures please feel free to send inquiry for us. 

Web: https://jmsweater.en.alibaba.com 

WhatsApp：008618520111505