An object is to provide a preparation process of a green tea extract having a high non-polymer catechin concentration and tasting good with less bitterness and less astringency. The present invention relates to a preparation process of a green tea extract, which comprises subjecting an enzyme-inactivated raw tea leaves to CTC processing, drying the tea leaves until the water content thereof becomes 20 wt.% or less, and extracting the tea leaves while setting the weight ratio of an extraction solvent to the tea leaves to be extracted to 30 or less.本發明之目的在於提供一種非聚合物兒茶素類濃度較高、苦味及澀味較弱且口味良好之綠茶萃取物之製造方法。本發明係關於一種綠茶萃取物之製造方法,其係對經酵素不活性化處理之生茶葉進行CTC處理,進行乾燥直至其水分含量達20質量%以下,其次,以萃取時萃取溶劑相對於茶葉之質量比為30倍以下之條件進行萃取。1...泵2...離子交換水加熱用交換器3...封閉型萃取管柱4...茶葉5...茶葉保持板(上)6...茶葉保持板(下)7...萃取液冷卻用熱交換器8...萃取液回收槽
