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| It’s hydrolyzed silk protein (fibroin)
with average molecular weight between 500－10000D,
white powder, soluble in water, its PH value between
5 to 7, positive ninhydrin reaction. |
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·Quality Index
| Items |
Index (Food Grade) |
Index (Common Grade) |
| Property |
White powder, deliquescence
in air, none special odor. |
Jasmine liquid, none special
odor. |
| Differentiation |
Positive ninhydrin reaction |
Positive ninhydrin reaction |
| Total nitrogen |
≥14.5% |
≥2.8% |
| Weight Loss on drying |
≤4.0% |
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| Residue on ignition |
≤1.0% |
1.0% |
| PH value |
5.0-7.0 |
3.0-5.0 |
| Average Molecular Weight |
500-2000D |
500-2000D |
| Solid Content |
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≥20% |
| Heavy Metal (as Pb) |
≤10.0ppm |
≤5.0ppm |
| As |
≤1.0ppm |
≤0.5ppm |
| Bacteria |
≤100/g |
≤100/g |
| Coli Group（MPN） |
≤30/100g |
≤30/100g |
| Pathogenic Bacteria |
Not detected |
Not detected |
·Utilizable
Character：
1. Skin Care and therapy:
Clinical trials show that silk peptide have good therapy effectives
for several dermatosis, such as Skin Cracks, Dermatitis, Pruritus
and Chloasma. It facilitate skin's regeneration, prevent skin from
chap and chemical harm.
2．Absorbability and adsorption: Series experiments indicate that compared
with other hydrolyzed albumen, such as collagen albumen, bone glue
albumen, glutin albumen, the most peculiarity of the silk peptide
is that it can be easy absorbed by hair. Radialization experiment
shows that the hair absorbs silk peptide directly, the higher concentration
of silk peptide leads more efficient absorbing and adsorption.
The silk peptide which molecular range 500 to 2,000, has better
character of making membrane, the membrane has nice luster, fell well
and spring. The method of X-radial experiment showed that the membrane
made of silk peptide is βmodel crystal and for this, the membrane
covered on the hair made of silk peptide is hardly washed out. This
is the theory of the method the silk peptide can protect the hair.
The membrane not only avoid the damnification by the chemistry material,
but also can enhance the spring and glare of the hair. The membrane
is some intention that can finalize the design. Compare with the PVP,
glue peptide and amylum with 80%RH, the silk peptide is the best one
can keep the hairstyle for a long time.
3．Adjusting and keeping wet: There are much hydrophilic genes, [such
as -OH,  -COOH,
-NH2, >NH] on the surface of the solid construct of the molecule
and this structure shows that the silk peptide equal to allocate wet
gene, and have good action of keeping wet.
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