Flax, also known as crow hemp and flax, is divided into three categories: fiber, oil, and fiber and oil, all of which are annual herbs. Due to its good hygroscopicity, fast moisture conductivity and relatively small diameter, it is one of the main fiber materials for clothes in spring and summer. Generally, the cloth woven from flax fiber is called flax fabric.

The price of high-quality pure linen sold on the market is high. The price can also reflect the quality of linen. High-quality primary-color linen is brown, shiny and evenly absorbent. The flax is not good in quality. It is treated as a soft fiber flax, which absorbs water unevenly and will turn black after wetting. Check whether the thickness of the longitude and latitude lines is uniform through light transmission. If the warp and weft are too uniform, it may be cotton fabric.