Silk Peptide Powder


What is Silk Peptide Powder?

Silk Peptide Powder is partially hydrolyzed silk fibroin powder by the degradation of silk fibroin protein. It is highly skin and hair compatible, whose molecular weight is between 500 and 10000, a white powder with good water-solubility, the ninhydrin reaction is positive. It imparts a silky, smooth feel to the skin. Use at 2 – 5% by weight in creams, lotions, shampoos, conditioners, bubble baths, shower gels, and other skin and hair care products.

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%

Natural Silk Culture and History

Silk is a natural protein fiber, and the Chinese often weave it into textiles, the protein fiber of silk composed of fibroin. The larvae of the mulberry silkworm Bombyx mori reared in sericulture is the best-known silk source. The shimmering appearance of silk is due to the silk fiber’s triangular prism-like structure, which allows silk cloth to refract incoming light at different angles, thus producing different colors.

Natural Silk is the Oldest Pride of China

Ancient China first developed silk. The earliest example of silk fabric has been found in a neolithic site in Henan and is dating back 8,500 years. Silk fabric from 3630 BC was used as wrapping a child’s body from a Yangshao culture site in Qingtaicun at Xingyang, Henan.

Legend gives credit for developing silk to a Chinese empress, Leizu (Hsi-Ling-Shih, Lei-Tzu). Silks were originally reserved for the Emperors of China for their use and gifts to others but spread gradually through Chinese culture and trade both geographically and socially and then to many Asia regions. Because of its texture and luster, silk rapidly became a popular luxury fabric in the many areas accessible to Chinese merchants. Silk was in great demand and became a staple of pre-industrial international trade. In July 2007, archaeologists discovered intricately woven and dyed silk textiles in a tomb in Jiangxi province, dated to the Eastern Zhou Dynasty roughly 2,500 years ago. Although historians have suspected a long history of the formative textile industry in ancient China, this find of silk textiles employing “complicated techniques” of weaving and dyeing provides direct evidence for silks dating before the Mawangdui-discovery and other silks dating to the Han Dynasty (202 BC-220 AD).

UNESCO designated the Silk Road as a World Heritage Site. With the development of trade on the Silk Road, most people know the natural silk comes from China, fostered and enhanced in Europe and America. It is even regarded as a valuable treasure by the Japanese in modern times.

Silk as fiber nearest to human skin in the world

Silkworm is a kind of insect belonging to the order Lepidoptera. After peeling off their skin four times, the larva of silkworm would eject silk from the mouth and fix it on the ground before putting up the falsework, which was used as the framework of cocoons, and the project of making cocoons need two to three days. Each mature silkworm has a pair of silk gland which consists of more than 900 gland cells.

At first, the silk protein, which was secreted by the silk gland, was liquid and then hardens to silk fiber as soon as it exposes to air from the silk tube.

The silk fiber consists of inside organizations fibroin (about 75%)and outside organizations sericin ( about 25%).

The fibroin itself still possesses a 35% interval from the volume. The sericin outside also has the Amino Acids that are a hydrophilic lateral chain, making silk has a great function of absorption of moisture still keeping its comfort and coolness despite torridness.

Silk fiber can bear 35-44Kg/cm² pulling force in a unit of cross-sectional area, and it can still restitute after elongating the 1/7 length of itself, which has excellent flexibility and is light, soft, and fluffy.

Silk Peptide Powder Benefits

Silk Peptide Powder for Skin

  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 skin cancer.
  5. Silk peptide powder also possesses the function of antioxidants.

Silk Peptide Powder for Hair

Silk peptide powder has a 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, Etc.), fibroin’s most prominent feature is that the hair easily absorbs it.

Silk Peptide Powder Specification

CharactersWhite powder, easy deliquescence
IdentifyNinhydrin reaction is positive
Total Nitrogen≥14.5%
Loss on Drying5.0%
Residue on Ignition3.0%
PH Value4.5.0-6.5
Average Molecular Weight500-30000 Da

 Silk Peptide Powder Main Function

It has actions of natural moisturizing, nourishing skin and promoting skin wound healing.

As clinically proven, silk peptide powder has good curative effects on skin wrinkle, dermatitis, pruritus, and eliminating chloasma. It is non-irritant and can accelerate wound healing. It can also prevent the skin from the erosion and damage of the chemicals such as dust, coating, acid, and alkali. Therefore, frequent daubing skin with skincare products rich in silk peptide can achieve the cosmetic effect and prevent a wide range of skin diseases.

Extremely Outstanding Hair Care Function

The hair care function of silk peptide is mainly reflected in the absorptivity, absorbability, film-forming property, humidifying, and moisture retention.
Compared with another protein hydrolysate (collagen, collagen protein, gelatin protein, etc.), the greatest feature of silk peptide is that it is rich in nutrition and can be easily assimilated into the hair. The absorption of silk peptide to skin and hair mainly depends on permeation. The increase of silk peptide concentration will enhance the absorptive amount to silk peptide by hair correspondingly. The damaged hair has a larger absorbed dose and adsorbing capacity, which in turn, silk peptide has a more obvious repair and protection effect on hair.
Silk peptide powder, of which the molecular weight is between 500 and 2,000, has wonderful film-forming property on hair, and the film has a unique luster, while the hair feels good and elastic. X-ray diffraction method shows that the membrane formed with silk peptide is the β type crystallization, and the membrane formed with silk peptide on hair can increase the elasticity and luster of hair. Meanwhile, it can also be used as a hairspray. Comparing the silk peptide with PVP, collagen peptides, starchy solution, under the damp condition of 80% RH, using silk peptide as hairspray can keep hair in good condition for a long time.
After losing a certain amount of water, the hair will be dry, vulnerable to breaking and coming off, and has split ends simultaneously. The membranes formed by silk peptides on the hair surface can prevent water from excessive evaporation. It can also adjust the moisture of little space on the hair surface as a natural moisturizing factor, making the hair soft and smooth.


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

Where to buy Silk Peptide Powder?

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

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