Product Type:	silk fabric
Material:	100% pure mulberry silk
Fabric Type:	Crepon Silk Crepe Fabric
Technics:	Plain/Solid Color/Crepon/Silk Crepe
Feature:	Eco-Friendly,breathable,hypo-allergenic,comfortable,anti duct mites,reduce wrinkles,Anti-Aging
Color:	Black/Various colors can be customized
Regular packaging:	1pc/pvc bag
Size:	Customizable
Lead time:	Normally 7-15 days,depend on the quantity.

This is not a standard test performed on silk! However, it is a fairly definitive test.
Extracted from the fabric edge off a bunch of silk yarn, lit with a match. The bunch of Silk burn slowly with faint glow. Firstly, it will curl into a ball with a similar smell of burning human hair or bird hair. Then, after burning into the dark brown globular, once you touch the globular,it will be broken into powder. Finally, when leaving the flame, it stops burning immediately. So Silk is also a natural flame retardant.The burning silk should smell like burning hair. (Both substances mainly consist of a fibrous protein–fibroin in the case of silk and keratin in the case of hair.)
A synthetic fabric will burn with a smell like burning plastic and will drip, form a black ball of residue (not ash), and produce black smoke. It will continue to burn even after the flame is taken away.