 Silk Powder
Physical Characteristics:
It is a kind of powdery high molecular protein with a molecular of 100,000,which is no taste,no smell,and is micro-dissolved in water,but not in ethanol.For making the silk cosmetics,the fineness of silk powder is generally between 1-100 m,if the grain size is too big,the smoothness of natural silk powder shall be poor,and give people the feeling of crude,but it would spoil the structure of natural silk material if the grain size is too fine.Since the surface gloss of silk is caused by the light interference effect on the silk surface,the fineness should be treated properly during the production process for silk powder,so as to keep the best standards of fineness,as well as the unique natural luster of it.
The Character of Utilize:
(1)The silk powder ia an excellent natural moisture-adjusting factor becaruse of its hydrophilic group existed in its molecular structure.A thin layer of silk powder adhered to the skin surface can absorb or release the moisture along with the change of temperature & humidity of skin surface,to prevent and cure the dermatosis caused by moisture or dry conditions in certain degree,and to keep your skin in hygiene.
(2)The crystal structure of silk powder not only can reflect part of the ultraviolet rays,but also can absorb part of it.Therefore,both the silk powder & the anti-sunbum face-cream to get the better skin-protecting results.
(3)The silk powder,similar to and better than the whitish soil,possesses the unique ability of keeping the oil,therefore,it is suitable for the cosmetics appllied to the oily skin.
(4)Because of its special structure of decreasing the reflective light,the silk powder,applying to the cosmetics on the micro powder,can reflect the real & soft color naturally.Compared with talcum powder or titanium white powder,the silk powder have the excellent character of air permeability which can be applied to those powder beauty cosmetics,such as the face powder or rouge etc.
(5)The silk powder also has a certain function of antianaphylaxis.
Package:This product is packed with the direct compound plastic bag in 500g for each one.It should be kept in cold,dry & no light place for two year's period of quality guarantee.
Physicochemical and Hygiene Indexes of Silk Powder:
| Item |
Specification |
| Appearance |
White or gray-white powder |
| Character |
no abnormal smell |
Average fineness
 m |
  90
 5 |
| Nitrogen content % |
 14.0 |
| PH Value |
5.0-7.5 |
| Loss on drying % |
6.5 |
| Residue on ignition % |
2.0 |
| Heavy metals mg/kg |
Hg |
1.0 |
| As |
2.0 |
| Pb |
20.0 |
| Aerobic bacterial count num/g |
m100 |
| Fecal Coliform |
No detection |
| Pseudomonas aeru |
No detection |
| Staphylococcus aureus |
No detection |
|
