二氧化鈦及氧化鋅在低含量時，萃取液未能提高SPF值，但當二氧化鈦及氧化鋅達一定比例時，添加萃取液能大幅提升SPF值。在DPPH測試中，各萃取液皆有清除自由基的效能。 Because every kinds of cosmetic ingredients in Taiwan relies on import, not only the high price but also the risk of unstable supply. It is thought that Taiwan is located in subtropical zone, has high altitude mountains and is surrounded by the sea. As the species are quite rich, it can develop the cosmetic ingredients which has Taiwan characteristics. So that, not only can reduce the cost of import but also reduce the risk of unstable supply. This thesis selects peaches, plums and plum blossoms which are grown in the middle of Taiwan and hope to bring greater economic benefits to them.
Extracting various parts of Rosaceae plant and diluting them. The samples which had been diluted was analyzed for spectroscopic spectrum. It was found that each extract was absorbed in the ultraviolet wavelength portion. Adding the different amounts of titanium dioxide and zinc oxide in the emulsion and add the different extracts to be determined the SPF value.
When the titanium dioxide and zinc oxide are low, the extract can't increase the SPF value; when titanium dioxide and zinc oxide reach the certain rate, add the extract can greatly increase the SPF value. In DPPH testing, each extract has good result.