How can we tell if the fabric is pure cotton?

How can we tell if the fabric is pure cotton?

First trick:

The pure cotton fabric feels naturally soft and plump, with a slight astringent and skewed feeling. The pulling range is smaller, and the recovery speed is slow after pulling. The chemical fiber fabric feels soft and loose, with a slippery feel, and the stretching range is large. Once you release your hand, you will bounce back to the original shape. In addition, since the cotton yarn is tough and has weak elasticity, the recovery time of pure cotton will be slightly longer after the wrinkles are made. When judging that pure cotton, you can fold the fabric in half and then use your nails to scrape along the edge. After unfolding, the more obvious the scratches are, the higher the cotton content is, and the purified fiber fabric will not leave scratches.

Second trick:

Except for caustic soda-treated mercerized cotton, the pure cotton fabric has no obvious luster and is naturally soft in color. When putting it down, the drape feels natural, and there is very little "reflective" phenomenon. When purchasing, you can flatten the bed and add a certain tension, and then turn the fabric and the body downward toward the light source at a 45-angle angle. If there is a bright light flashing, then this must be a high-content chemical fiber. In addition, due to the addition of fluorescent whitening agent, the whiteness of the chemical fiber will be whiter than that of pure cotton, and even have a dazzling feeling.

The third level:

From a professional perspective, the best way is to use “ "Samadhi True Fire" to refine: Take out a small yarn from the edge of the seam to inspect it. The real natural cotton fiber will not melt and shrink when burned, but will produce a natural yellow flame like paper, and at the same time it will produce a odor of burning paper. After burning, it will produce off-white ash that can be crushed; while the chemical fiber will melt and drip when burning, and there will be black smoke and glue smell, which will form a black hard spot.