Definitions of the product:
The product is water soluble polypeptide formed by degradation of silk protein (fibroin) with average molecular weight between 500-10000, white powder and good water solubility, with pH value between 4.5 to 6.5 and positive ninhydrin reaction.
Quality Index
Items | Index |
Appearance | White powder, deliquescence in air, none special odor. |
Differentiation | Positive ninhydrin reaction |
Total nitrogen | ≥14.5% |
Weight Loss on drying | ≤4.0% |
Residue on ignition | ≤3.0% |
pH value | 4.5-6.5 |
Average Molecular Weight | 500-2000D |
Heavy Metal (as Pb) | ≤5.0ppm |
As | ≤1.0ppm |
Bacteria | ≤100/g |
Coli Group（MPN） | ≤30/100g |
Pathogenic Bacteria | No detection |
Detail Function:
1. The natural silk peptide is soluble silk protein, containing 18 kinds of amino acids, especially the silk serine protease and amino-succinic acid, glutamic acid are all skin nurture, which are easily absorbed through epidermis to improve the nourishment of skin through epidermis cell and strengthen skin cell energy. Use the cosmetics which have Silk Peptide for a long time, can strengthen the effect of skin and delay decrepitude.
2.The natural silk peptide can restrain the activity of the beta-parahydroxy-phenylpropionic acid, the element of melanin in the skin. And it can make the skin pure without blemish.
3. The natural silk peptide is a kind of natural wet adjusting material, effectively hydration function, and makes skin full of flexibility, moisture.
4. Natural silk peptide is good treatment to dry skin, the skin scratch and the gestation scratch, protecting skin from sunlight strictly and coldly. It can promote skin organization of rebirth and wound.
5. Natural silk peptide makes a good effect as the function of cosmetic .Because the silk protein is extremely alike hair's, it can protect the hair immediately by becoming one thin but transparent protection film on the hair surface. It can increase hair flexibility, sheen and softness, and is free from the influence that water flushes.
6. Natural silk peptide with natural, the purely true quality is accepted by more and more people and has vast applied foreground in all kinds of cosmetic.