Skin care composition containing black willow bark extract
A technology of willow bark extract and skin care composition, which is applied in the field of cosmetics, can solve problems such as excessive exfoliation and skin sensitivity, and achieve the effects of preventing acne, high extraction rate, and promoting cell renewal
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[0029] The present invention will be described in further detail below in conjunction with specific embodiments.
[0030] The compositions of Examples 1-4 and Comparative Examples 1-3 are as follows, and Comparative Example 4 is a conventional commercially available product, which is not listed.
[0031] The preparation method of the black willow bark extract of embodiment 1-4 and comparative example 1-3 comprises the steps:
[0032] a. the black willow bark is cleaned, dried, and crushed into powder through high-speed shearing;
[0033] b. Put the powder obtained in step a in the reaction device, add 80% ethanol by volume, 50 ℃, ultrasonically extract for 30-50min, take the filter residue after filtration, put the filter residue in the reaction device, add 80% ethanol by volume, 50 °C, ultrasonically extract for 30-50min, filter and combine the filtrate obtained twice;
[0034] c. The filtrate obtained in step b flows through the external circulation device to the decoloriz...
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