| 摘要 |
PROBLEM TO BE SOLVED: To manufacture green tea drink having natural green tea color and excellent in taste by solving such problems that in green tea drinks such as a PET-bottled tea drink, although the label indicates green tea, actually the liquid is brown, far from green, due to the facts that, in the conventional processes, largely oxidized tea leaves are used as a raw material, and in the conventional process for manufacturing rough tea, oxygen deactivation is imperfect. SOLUTION: Rough tea affected by little oxidation and having excellent color development can be manufactured by the following process: tea leaves are taken out in the middle of the course of conventional rubbing process for rough tea after passing a specified time adequate for producing good taste by rubbing, not finishing the whole; subsequently the taken out tea leaves are charged into a reduced pressure tank; the pressure of the tank is controlled at a single or plural targeting reduced pressures; and the tea leaves are dried by applying a drying method using controlled microwave heating.
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