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Tea Grading. Once manufactured, tea is graded based on its physical description (including leaf size and color). Tea grading varies widely from country to country and from one type to another.It is important to know that tea grading does NOT reflect the quality of the brew (with the exception of graded teas from Taiwan). Indian black teas are subject to the most structured and extensive grading system.he same grading terminology that is used for whole leaf (OP) teas is also applied to BOP teas (e.g. TGBOP = Tippy Golden Broken Orange Pekoe). BOP teas retain much of the quality attributed to whole leaf, or OP tea, and are often used to make tea blends.
How much caffeine is in oolong tea? The caffeine levels are similar in all types of tea and are dependent on steeping time. When steeped for 5 minutes, tea has about 50-70 mg of caffeine per cup of tea. Oolong tea is usually steeped for a much shorter time (less than a minute) so there is significantly less caffeine. In addition, oolong tea leaves can be brewed multiple times, and each time the caffeine levels decrease by about 75%. By the fourth infusion there is almost no caffeine left, but a good quality oolong tea will still have plenty of flavor. Back to Top