actually, a quoted paper looks more interesting to me...
Research on Fermentative Craft of Pu-erh TeaMENG Xiao-hong,SUN Yun,ZHANG Hui-fen,CHEN Hong-liang,LEI Ying(Faculty of Chemical Engineering,Kunming University of Science and technology,Kunming 650224,China)
Pile-fermentation by increasing the beneficial microbes to deal with the Yunnan sundried green tea is studied and optimized in this paper.Taking temperature,time,moisture and germ dosage as the four factors to carry out the orthogonal experiment.The quality of Pu-erh tea is then tested by sensory evaluation and the changes of tea polyphenol.It is shown through the results that the aroma and taste of Pu-erh tea with 10.57% tea polyphenol is best formed when the temperature is 45℃,moisture 25%,germ dosage 6 mL/ 150 g dried tea and time 18 days.
http://en.cnki.com.cn/Article_en/CJFDTO ... 804021.htm