What is Sericin Silk Powder?

Sericin Silk Powder is the colloid protein wrapping in the outer layer of silk.

Silk is the long continuous fiber consists of two fibroins and the sericin covering the outside.

The general composition of silk fiber:

  • Fibroin 70-80%
  • Sericin 20-30%
  • Lipid 0.4-0.8%
  • Hydrocarbon 1.2-1.6%
  • Pigment approximately 0.2%
  • Ash content approximately 0.7%

Silk emitted by the silkworm consists mainly of two proteins, sericin, fibroin; fibroin being the silk’s structural center, and sericin being the gum coating the fibers and allowing them to stick to each other.

The chemical composition of sericin is C30H40N10O16. It is a kind of yellowish powder and is soluble in water, whose ninhydrin reaction is positive.


Skin care

  1. It has the functions of natural moisturizing and skin nourishing
  2. Possessing the action of inhibiting melanin production,
  3. Promoting the regeneration of skin tissue, guard against chapping and chemical damage
  4. Inhibiting the skin cancer
  5. Silk protein also possesses the function of antioxidant
  6. Silk protein also possesses the function of antioxidant

Hair-caring, hair-nourishing and hairdressing

Silk protein’s hair-caring function depends on the absorbency, absorptivity, film-forming ability and moisturizing type it received by hair. Compared with other protolysates (collagen, bone collagen, glutin and so on), the biggest feature of fibroin is that it is easy to be absorbed by the hair.

The Nutritional Function of Fibroin Food

Silk protein contains 18 types of amino acid, over 90 percent of which can be absorbed by human body. Its percentage of amino acids which are necessary to human body reaches more than 17 percent, higher than normal food. Therefore, it is a very good way of amino acid supplements to add the fibroin into the food. Japan began the research of turning silk into food as early as 1983. Like silk cake, biscuits, noodles, soba noodles, jelly glues, ice cream, candies, porridge, drink, soy and other kinds which contain components of silk, such as mushroom, tea, capsule, tablets and so on, they have appeared in the market, and are very popular among customers, which become the new generation of healthy food and nourishment in Japan.


  1. Lower blood pressure and cholesterol levels.
  2. Anticoagulant and anti-HIV activity effects.
  3. Anti-inflammatory effect.
  4. Cancer prevention effect.

Functional Materials, Fibers and Textiles

  1. New electronic materials.
  2. Degradable biological materials.
  3. Synthetic macromolecule materials and products.
  4. Functional biological membranes.
  5. IFunctional fibers and textiles.


CharactersWhite to Light Yellow Powder, Easy Deliquescence. Solubility in Water
Total Nitrogen (%)≥14
The Percentage of Polarized Side Amino Acids in the Total Quantity of Amino Acids (%)>70
 Loss on Drying (%)5.0
Residue on Ignition4.0
 PH Value5.0-7.0
Heavy Metal (Pb)/(mg/kg)≤5
 Arsenic (mg/kg)≤0.5
 Total Bacterial Count (CFU/g)≤3000
Coliform (MPN/100g)≤90
 Pathogenic Bacteria (Salmonella, Shigella, Staphylococcus Aureus)Negative


  • 25Kg/Fiber Drum, double plastic bag inside, with carton outside.
  • Sample – aluminum foil bag vacuum packing.

Where to buy Sericin Silk Powder?

Just send an email to [email protected], or submit your requirement in bottom form. We are of service at any time!