1. Hand feeling: silk, viscose and nylon are very soft.
2. Weight: nylon, acrylic, and polypropylene are lighter than silk; cotton, hemp, viscose, and rich fiber are heavier than silk; vinylon, wool, acetate, and polyester are similar in weight to silk.
3. Strength: stretched to break by hand, the weaker ones are glue, cellulose acetate, and wool; the stronger ones are silk, cotton, hemp, synthetic fibers, etc.; the weaker ones are the protein fibers and sticky fibers. Glue, cupra.
4. Elongation: When stretched by hand, wool and acetate fibers are the ones with greater elongation; the smaller ones are cotton and hemp; the moderate ones are silk, viscose, rich fiber and most synthetic fibers.
