|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||426/597 ; 426/263 ; 426/312|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 1 인용 특허 : 0|
Black tea leaves are oxidized to provide treated leaves from which aqueous tea extracts which have minimal turbidity, particularly when cooled, may be obtained. The oxidation reaction is performed on black tea leaves which contain moisture only in an amount such that the oxidation reaction occurs at localized sites on and within the tea leaf structure.
A black tea product of a process comprising contacting moist black fermented tea leaves at an elevated temperature at a pressure greater than the water vapor pressure at the elevated temperature with an oxidizing agent which provides an amount of molecular oxygen sufficient to oxidize polyphenolic compounds contained in the moist leaves for obtaining a black tea leaf product which provides, upon aqueous extraction, an extract having a turbidity of less than 200 NTU at room temperature, wherein the turbidity is determined by infusing the product leaves wi...