Patent ID: 8663720

Claim:
A process for preparing Pu-erh tea, comprising: applying Aspergillus niger to tea leaves in the presence of tea leave stems to produce a fermentation mixture, adjusting water content of the fermentation mixture to 30 to 50% by weight, spreading the fermentation mixture on a bed in a fermenting chamber, increasing the temperature of the fermenting chamber to at least 32° C. within 25 hours, and fermenting said tea leaves in the presence of said tea leave stems, wherein the amount of said tea leave stem is 25 to 34.9 parts by weight based on 100 parts by weight of said tea leaves, wherein the fermenting is conducted in the presence of Aspergillus niger for 76 to 86 hours at a temperature of 32 to 45° C., and wherein the amount of the Aspergillus niger is 0.001 to 1% by weight based on the total amount of the tea leaves and tea leave stems.