Then the leaves are rolled to bruise them, chopped, oxidised and slow-dried before being blended into Classic Tea, Afternoon Tea, Earl Grey and Green Tea.

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After three military tours in Vietnam and a stint at the natural-food store in Portland, he blended his first herbal tea in 1975 at Stash Tea, in which he was an early partner.

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Extracted from the rind, the oil is blended into many perfumes and is a key ingredient in Earl Grey tea.

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