Cold water infusing leaf tea

A - Human Necessities – 23 – F

Patent

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A23F 3/10 (2006.01)

Patent

CA 2359882

A method for preparing a cold water infusing leaf tea. Green tea leaves are macerated, treated with tannase, fermented in the presence of hydrogen peroxide in an amount that is sufficient to activate endogenous peroxidases to oxidise gallic acid and other compounds that are liberated by the tannase treatment, and then dried. The final product is a black leaf tea that infuses in hot or cold water to give good flavour and colour.

L'invention concerne un procédé de préparation de thé en feuilles par infusion dans de l'eau froide. Ce procédé consiste tout d'abord à faire macérer des feuilles de thé vert, puis à les traiter avec une tannase, avant de les laisser fermenter en présence d'une quantité de peroxyde d'hydrogène suffisante pour activer les peroxydases endogènes et ainsi oxyder l'acide gallique et d'autres composés libérés par le traitement à la tannase, et de les sécher. Le produit final ainsi obtenu est un thé noir en feuilles pouvant infuser dans de l'eau chaude ou froide et offrant un goût et un aspect agréables.

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