Chemical detection method: Chemical detection method for fabric composition is also common. A density gradient solution needs to be prepared, usually using a xylene tetrachloride system. The commonly used method for calibrating density gradient tubes is the precision ball method. Measure and calculate the fiber to be tested, and perform pre treatment such as deoiling, drying, and defoaming. After making a small ball and balancing it, measure the fiber density based on the fiber suspension position.

The fluorescence law uses ultraviolet fluorescent lamps to illuminate fibers, and identifies fibers based on their different luminescent properties and fluorescence colors. The fluorescence colors of various fibers are specifically displayed, with cotton and wool fibers being light yellow; Mercerized cotton fibers are light red and so on.

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