How to identify mulberry silk and tussah silk?

There are two main types of silk quilts on the market today: mulberry silk and tussah silk. Many people are not clear about the difference between them and often mix them up, but there is a big difference between the two.
Mulberry silk is thin and long, white with slight yellow colour, and feels delicate and smooth. The quilts made from this silk are particularly soft and snug and best quality.
Tussah silk is yellowish-brown in colour, and its thickness is comparable to that of hair silk, and its fastness is strong so that it can be made into quilts only after treatment.
The difference between mulberry silk and tussah silk

1. Structure

The amino acid composition of tussah silk is different from that of mulberry silk. The cross-section of mulberry silk is a positive triangle, while the cross-section of tussah silk is flat.

2. Color
   Mulberry silk is white like jade, slightly light beige, and cannot be found with the naked eye, while tussah silk is yellowish-brown, and the treated tussah silk will become pale white, and the texture of the silk is disordered.
3. Thickness
   The thickness of mulberry silk is generally only 1/10th of the thickness of hair silk, while the thickness of tussah silk is comparable to that of hair silk.
4. Length
   The fibre length of mulberry silk is significantly longer than tussah silk, which is thicker, so it has to be pulled apart by machinery, and the length is usually no more than 80 cm. While the length of mulberry silk can be more than 1000 meters.
5. Feel
   Mulberry silk feels delicate and silky, while tussah silk is relatively rough, while tussah silk is also more rigid and not very flattering than mulberry silk.