Study On Ultrafine Green Tea Powder Applied To Cosmetics And Food

In this study,the ultrafine green tea powder(UGTP) grained from shaded summer tea leaf was used to develop a kind of cookie and facial mask.We analyzed the raw material and found that UGTP has a higher content of water soluble extract(43%) and amino acid(5.03%),Very small grain size(6.247μm).Four factors and three levels were designed to select the best formula,the sensory evaluation and physical and chemical characteristics of the ultrafine green tea cookie were measured too.According to the results we obtained the best formula of cookie was:each 100 g flour contained 65%butter,60%powdered sugar,0.5%baking powder,3%ultrafine green tea powder,5%milk powder and 20%eggs.Meanwhile,we found that adding ultrafine green tea powder would cut down the moisture,acidity and free fat contents of cookie.In accelerated test, to compare with control the samples showed a linear increase of water content and decrease of pH value.Acid value was in line with hygienic standard,while peroxide value didn't begin to rise until the fourth week.In the study we made the good taste and fresh color green tea cookie, it means that small size green tea powder could improve the quality and reduce the free fat.Based on the results for optimizing drying time and adhesiveness value of gel facial mask by RSM a gel facial mask formula was:PVA10%,pullulan sugar 4%,glycerol 5%,ethanol 3%, ultrafine green tea powder 0.5%,preservative 0.01%,adding distilled water to 100%.The final drying time was 976±8 s and the adhesiveness was 3494±37g/sec.In this research ultrafine green tea powder,ultrafine green tea powder+superoxide dismutase(SOD),tea polyphenol(TP) powder(98%purity) and TP powder+SOD were added into four groups of gel facial masks respectively and to measure their stabilities in three temperature 4℃,25℃and 45℃.The results showed that the pH value of gel mark was increased at low temperature and decreased in room and high temperature;TP and EGCG would more dramatic decrease in SOD groups and color was changing fast;Low temperature was the best storage conditions for samples.On the contrary,the color and active ingredients in each group changed rapidly under high temperature environment,but the treatment with ultrafine green tea powder was much more stable than that with TP powder.The gel mask with ultrafine green tea powder had a color of dark green, suitable drying time and easy coated,which could make the skin smooth and moist after using.This study proved that small size UGTP can be used in food and cosmetic and modify the quality,and also reduced the risk of high sugar and fat in food for human-being.Other way even summer tea fresh leaf still has good usages.