How to identify different types of hemp fibers based on their longitudinal and cross-sectional characteristics? Hemp, a natural cellulose fiber, has the same chemical properties and macromolecular structure, so it can only be identified by microscope with the unique appearance and morphological characteristics of different kinds of hemp fibers.
How to Identify Various Common Hemp Fibers: Ramie
The longitudinal appearance of ramie fiber is flat or cylindrical, mainly flat. It has curved and has not curl. The surface of the fiber is smooth and uneven.
The cross section of ramie fiber is oval, with oval or waist round cavity, uniform cell wall thickness and radial cracks.
How to Identify Various Common Hemp Fibers: Flax
The longitudinal appearance of flax fiber is flat or cylindrical, mainly cylindrical. The fiber is straight without curl. The surface of the fiber is smooth, with obvious slubs and grooves. The evenness of fiber is good. ย The cross section of flax fiber varies with the position of flax stem. It is generally round, polygonal or elliptic, with thick cell wall and small lumen.
How to Identify Various Common Hemp Fibers: Hemp
The longitudinal appearance of hemp fiber is complex and diverse, including irregular cylindrical shape, flat strip shape and prism shape. Some have natural twist, like cotton. The fiber orientation is poor and intertwined. The surface of fiber is smooth and rough. There are slubs but not obvious, and the fiber thickness is uneven. The fiber end is blunt and round. ย The cross section of hemp fiber is very complex, which is irregular triangle, quadrilateral, hexagon, oblate, waist circle or polygon.
How to Identify Various Common Hemp Fibers: Jute
The longitudinal surface of jute fiber is straight, smooth and glossy. Generally, it is a bundle like structure with no twist and columnar structure. The fiber fineness is uniform. ย The cross-section of jute fiber is generally pentagonal or hexagonal, the central cavity is oval or round, and the cell wall thickness is uniform.
How to Identify Various Common Hemp Fibers: Apocynum
Apocynum fiber is slender, straight, smooth, round and transparent, with silk general luster. Generally, it is a regular cylindrical structure without distortion. The fiber fineness is uniform. ย The cross section of Apocynum venetum fiber is usually polygonal or elliptic, and its cavity is large.
