Silk fibroin powder / silk protein powder,China Sifeng price supplier

Silk fibroin powder / silk Protein Powder

Silk Powder:

 

Silk powder (silk fibroin powder) is a kind of macromolecular silk fibroin in powder form, which is made from the silk fibroin degummed under high pressure, requires special craft processing and smash through physical methods. Its molecular weight of is about 250000. It is tasteless, odorless, slightly soluble in water and insoluble in Alcohol ether.

 

Specification of Silk Powder :

 

Items	Average particle size:
Coarse silk powder	40 micron
Superfine Silk Powder	10 Microns
Superfine Silk Powder	5 micrometers
Ultrafine and ultra-micro silk powder	2 micrometers
Nanometer silk powder	350 nanometers

 

Quality Index of  Silk Powder :

 

Items	Index
Characters	White or slight grayish yellow powders
Total Nitrogen (%)	≥14.5
Weight loss on drying (%)	≤6.0
Residue on ignition (%)	≤4.0
PH value	5.0-7.0

 

 

 

Application Characteristics of  Silk Powder :

 

(1) The silk powder is an excellent natural moisturizing factor because of the presence of hydrophilic gene in the structure of silk. It can attach a very thin silk powder layer to the surface of skin, which can absorb or release water with the change of the temperature and humidity of skin. This has certain preventive and therapeutic effects on skin protection, preventing and curing various skin diseases caused by moisture and drying.

(2) The crystalline structure of silk powder can reflect part of ultraviolet ray, and the hollows formed by the spiral structure can again absorb part of ultraviolet ray, so it will make the better sun-screening effect by using the compound of silk powder and sun-screening agent in sunscreen products.

(3) Silk powder has a unique ability of keeping the oil, which makes it more suitable to be used in cosmetics for oily skin.

(4) The structural features of silk powder can help reduce the reflected light. When being used in cosmetics in which the mica powder is taken as substrate, it can reduce the reflected light and make the skin show vivid and soft colors naturally. Compared with talcum powder and titanium dioxide, silk powder has excellent air permeability, users would feel particularly smooth after applying cosmetics containing silk powder.

 

Storage: Tightly sealed in a clean,cool,dry area, keep away from strong, direct light.

Shelf life: 2 years