SummaryWe developed a simple and low-cost storage method for keeping crude tea in a daikai-bag.(1) Oxygen in the daikai-bag could be replaced with nitrogen by allowing a continuous flow of nitrogen gas into the airtight container that fed the daikai-bag. (2) When the nitrogen gas mass flow per hour into the container was the same as the volume of a container and the pressure in the container was 0.01 MPa or more, the oxygen concentration in the daikai-bag became 1% or less within 10 hours. Moreover, since there was pressure, mixing with the open air was suppressed. (3) The oxygen concentration in the daikai-bag kept 1% or less for six months by maintaining pressure in the container. (4) The quality of crude tea after six months storage by the new storing method was changed very little compared with tea stored using the conventional storing method which put tea in the aluminum bag and was filled up with nitrogen gas.
We developed a new parching machine with super-heated vapor or super-heated highmoisture atmosphere as a heat medium, and investigated the influence exer ted on the characteristics of manufactured tea and crude tea quality. 1 We developed machine specifications that improved throughput and allowed us to control stable quality compared with the conventional kamairicha parching machine. 2 The new parching machine could not only manufacture like kamairicha but also achieve various degrees of steaming of products like green tea or heavily steamed sencha. 3 The new parching machine could not only deactivate enzymes but dry leaves. 4 The influence of throughput was great with respect to the grade of pan-parched flavour, which meant that there was a contact opportunity for tea leaves and the surface of machine's wall. 5 Unpleasant smells such as that produced in a summer crop of tea were reduced by the new parching machine.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.