An externally applied composition and cosmetic preparation having whitening effects and preparing methods thereof
A technology of composition and efficacy, applied in the field of external skin care composition preparation and its preparation, external herbal composition, and external herbal extract composition, can solve the problems of reducing melanin and achieve easy acceptance, easy acquisition, good application prospects and The effect of market prospects
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[0070] Two, the preparation of a kind of plant extract composition for external use
[0071] The following various chemical raw materials are commercially available. Various experimental instruments in the present invention are conventionally used instruments in the art.
Embodiment 1
[0073] (1) After pulverizing the plant raw materials of the above-mentioned components, weigh them according to the dosage of formula 1, and mix them evenly;
[0074] (2) Extract with ethanol with a volume percentage concentration of 95% (v / v), the mass volume ratio between the crude drug and ethanol is 1:20 (g / mL), and the extraction time at 80°C is 2.5h;
[0075] (3) cooling the extract obtained in step (2) to 30° C., filtering through a 100-mesh filter cloth to obtain the filtrate;
[0076] (4) To the filtrate obtained in step (3), add 1,3-propanediol with the same quality as the ethanol in step (2) to mix evenly, spin out all the ethanol in the solution, and spread a 0.45 μm filter in a Buchner funnel. The plate is subjected to vacuum filtration under reduced pressure, and the filtrate is collected to obtain the obtained product.
Embodiment 2
[0078] (1) After pulverizing the plant raw materials of the above-mentioned components, weigh them according to the dosage of formula 2, and mix them;
[0079] (2) Extract with ethanol with a volume percentage concentration of 75% (v / v), the mass volume ratio between the crude drug and ethanol is 1:10 (g / mL), and extract at 75°C for 1 hour;
[0080] (3) cooling the extract obtained in step (2) to 25° C., filtering through a 100-mesh filter cloth to obtain the filtrate;
[0081] (4) To the filtrate obtained in step (3), add 1,3-propanediol with the same quality as the ethanol in step (2) to mix evenly, spin out all the ethanol in the solution, and spread a 0.45 μm filter in a Buchner funnel. The plate is subjected to vacuum filtration under reduced pressure, and the filtrate is collected to obtain the obtained product.
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