Study on the Brewing Conditions of Black Tea
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概要
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The extracted amount of the tannin, soluble nitrogen and soluble matter and the concentration of the tea infusion were examined under the different brewing conditions of black. tea.<BR>During the period of brewing, the hotter the water, the more the extracted tannin, soluble nitrogen and soluble matter from the leaf. And the longer the period of brewing, the more the extracted soluble substances.<BR>The tea infusions grew stronger liquors by hotter and longer brewing, but the liquor of low grade tea became duller in colour.<BR>As the results of these experiments, the suitable brewing conditions were supposed to be about 90°C.: 5 minutes or 100°C.: 2-3 minutes.
- 日本茶業技術協会の論文
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