Real silk is real silk, not chemical fiber ，it's not blended either.Silk generally refers to silk, including mulberry silk, tussah silk, castor silk, cassava silk and so on. Real silk is called the "fiber queen" and has been favored by people throughout the ages for its unique charm. Real silk is a protein fiber
The Domestically Produced Silks and Satin Adopt the Unified Product Number Established by the China National Silk Corporation. the Article Number is Composed of 5 Arabic Numerals. the First Digit on the Left Indicates the Type of Material: "1" for All-silk Fabrics (including Mulberry Silk and Spun Silk), "2" for Chemical Fiber Fabrics, and "3" for Blended Fabrics. Tussah the Silk Fabric is "4", the Rayon Fabric is "5", the Interwoven Fabric (including Acetate Silk Fabric) is "6", and the Quilt Fabric is "7".