How to identify the real silk and chemical fibre silk

Observation of luster
Real silk luster is soft and even, although bright but not harsh; rayon fabrics luster although also bright, but not soft and smooth; polyester silk luster is even, but there is a flash or bright silk; nylon silk fabrics luster is poor, as coated with a layer of waxy feeling.
Hand feeling
Silk fabrics have a pulling feeling when you touch them, while other chemical fibre products do not have this feeling; rayon fabrics are smooth and soft, but not firm; cotton silk fabrics are harder and not softer to the touch.
Observe the crease
When the hand pinch tight silk fabrics and then released, because of its elasticity without creases; rayon fabrics after the release of obvious creases, and creases are difficult to restore the original state; nylon silk, although there are creases, but also can slowly restore the original state, so do not be confused by its illusion.
Fibre tension test
In the edge of the fabric at the edge of a few fibers drawn, with the tongue will be wet, if in the wet at the easy to pull off, that is rayon, if not in the wet at the pull off, is silk, such as fibers in the dry and wet state of the strength is very good, not easy to pull off is nylon or polyester silk.
Listen to the friction sound
Because of the silk appearance of silk protection and friction resistance, so the dry silk fabrics in each other when rubbing will emit a sound, commonly known as silk or silk sound and other chemical fibre products are not sound appear.