1. Fleece cross-sectional coverage

The cross-sectional coverage of fluff is the percentage of the total cross-sectional area of fluff to the total area of the ground cloth. A high coverage rate of the velvet section indicates a good degree of fullness of the velvet surface.

2. Velvet height

The height of the velvet pile refers to the average height of a single pile of fluff standing upright on the surface of the fabric after cutting. When the height of the fluff is high, the velvet surface is straight and has poor elasticity, but the velvet surface is fuller.

3. Velvet fullness

The fullness of velvet refers to the volume of fluff per unit area of fabric. It includes two factors: the coverage rate of fluff and the height of fluff. The unit for measuring the fullness of velvet is "density". The higher the density, the fuller the velvet texture. The common weft velvet has a fullness of about 11 density, while the warp velvet has a fullness of about 15 density.

4. Consolidation tightness of fluff

The compactness of pile consolidation refers to the degree to which the pile yarn is compressed by the arrangement of ground warp yarn and pressed warp yarn in the fabric structure. The greater the consolidation tightness, the better the firmness of the fluff consolidation, and the less likely it is to shed hair. The consolidation tightness of flat velvet is represented by the tissue tightness in the direction of the weft yarn, which is equal to the sum of the warp tightness of the fabric and the tightness of the interweaving point between the velvet yarn and the warp yarn. The compactness of the warp yarn in warp yarn indicates the degree to which it is compressed by the arrangement of weft yarns in the fabric structure.