The invention discloses a
plant essence composition for brightening and whitening as well as a preparation method and application thereof. The composition is prepared from the following components in percentage by weight: 3 to 6 percent of a
polygonatum odoratum root extract, 1 to 3 percent of a pomegranate extract, 1 to 3 percent of a
mulberry root bark extract, 3 to 6 percent of a
polygonum cuspidatum root extract, 30 to 40 percent of
polysorbate-20, 30 to 40 percent of
butanediol and 20 to 30 percent of water. The preparation method comprises the following key steps: performing cryogenic
embrittlement and low-temperature
airflow superfine grinding on four
plant raw materials, and performing low-temperature directional extraction by adopting compound
enzyme; carrying out two-stage
centrifugation and deep
filtration on the extracting solution, specifically collecting a target precipitate under the
ethanol concentration of 65% by virtue of a multi-stage gradient
alcohol precipitation process, and washing and purifying by virtue of a 80%
ethanol solution; and performing high-pressure homogenization on the purified
active matter to construct a layered
liquid crystal structure, performing membrane
filtration and low-temperature instantaneous sterilization in sequence to perform terminal refining, and finally performing sterile filling to obtain the product.