Lipton, Division of Conopco, Inc.

Unilever Plc

Unilever, N.v.

Ambalavanar Thiru

Andrew David Parry

Richard Safford

Christopher William Goodsall

Timothy Graham Jones

Joseph Kipsiele Mitei

Peter Kiprotich Ngeno

Stephen Peter Colliver

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 oxidize 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 flavor and color.

Cold water infusing leaf tea

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.

Theaflavin is produced by separating theaflavin from a slurry fermentation product of green leaf tea that has been treated with tannase prior to slurry fermentation. Methods for making theaflavin-rich extracts and cold water soluble tea powders and products are provided.

Producing theaflavin

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Bedford, United Kingdom

Ambalavanar Thiru