1, cotton and linen refers to textiles made of cotton and linen. Both cotton and hemp are grown from temperate plants. The seed parts of cotton and castor are collected, dried in the sun, threshed by machine, decomposed into seeds and cotton and hemp parts, squeezed by machine, spun into thread and cloth, and finally dyed to get the finished product.

2. Polished products of cotton, hemp and wool refer to cotton (plant) and hemp (plant) wool (animal hair) made by production process, which are used for polishing and grinding. Italian handicrafts are the most famous.

3. Cotton fiber is a seed fiber formed by the elongation and thickening of epidermal cells of fertilized ovules, which is different from ordinary bast fibers. Its main component is cellulose. Cellulose is a natural polymer compound with the chemical structural formula of (C6H 10O5) n, and the cellulose content of normal mature cotton is about 94%. In addition, it also contains a small amount of pentosan, wax, protein, fat, water-soluble substances, ash and other associated organisms. Because cotton fiber has many excellent economic properties, it has become the most important raw material in textile industry. Cotton fiber has high strength, good wrinkle resistance and poor extensibility; Good heat resistance, second only to hemp; Poor acid resistance, dilute alkali resistance at room temperature; Good affinity for dyes, easy dyeing, complete chromatography and bright color.