Observation gloss: The luster of real silk is soft and even, bright but not dazzling. Although the rayon fabric has bright luster, it is not soft and smooth. Although the luster of polyester silk is uniform, it has glitter or bright wire. The nylon fabric has a poor luster, as if it was coated with a layer of wax.
Hand-touching feeling: When touching silk fabrics with hands, there is a feeling of holding hands, while other chemical fiber products do not have this feeling. The rayon fabric is smooth and soft, but not crisp. The cotton silk weaving hand touches harder but not softer.
Check the creases carefully: When you pinch the silk fabric tightly and then release it, it has good elasticity and no creases. The rayon fabric has obvious creases after letting go, and the creases are difficult to restore to their original state. Although nylon silk has creases, it can slowly return to its original state. Don’t be confused by its illusion.
Fiber test tension: Pull out a few fibers at the edge of the fabric and moisten them with your tongue. If it is easily pulled out at the wet place, it means it is rayon. If it is not pulled out at the wet place, it is silk. If the fibers are strong in wet and dry state, it is nylon wire or polyester wire.
Listen to the friction sound: Because the silk surface is protected by sericin and is resistant to friction, dry silk fabrics will make a sound when they rub against each other, commonly known as silk sound or silk sound, while other chemical fiber products appear silently.