Hand feeling visual measurement method: This method is applicable to textile raw materials in a loose fiber state

(1) Cotton fibers are shorter and finer than ramie fibers and other hemp fibers, as well as wool fibers, often accompanied by various impurities and defects (2) The hemp fiber has a rough and hard feel (3) Wool fibers are curly and elastic (4) Silk is a long and slender filament with a special luster (5) Among chemical fibers, only viscose fibers have significant differences in strength between dry and wet states (6) Spandex yarn has great elasticity and can stretch to over five times its length at room temperature 2. Microscopic observation method: It identifies fibers based on their longitudinal and cross-sectional morphological characteristics (1) Cotton fiber: Cross section shape: waist circular, with a middle waist; Vertical shape: Flat and banded, with natural curvature (2) Hemp (ramie, linen, jute) fibers: cross-sectional shape: waist circular or polygonal, with a central cavity; Vertical morphology: with horizontal sections and vertical patterns (3) Wool fibers: cross-sectional shape: circular or nearly circular, some with hair pulp; Longitudinal morphology: There are scales on the surface (4) Rabbit hair fibers: cross-sectional shape: dumbbell shaped, with hair pulp; Longitudinal morphology: There are scales on the surface (5) Mulberry silk fiber: cross-sectional shape: irregular triangle; Longitudinal shape: smooth and straight, with stripes in the longitudinal direction (6) Ordinary viscose fiber: cross-sectional shape: serrated, leather core structure; Longitudinal shape: There are grooves in the longitudinal direction

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