What leaf particle type typically fills traditional, standard tea bags?

Answer

Fannings or dust

Traditional tea bags are frequently filled with what is technically known as 'fannings' or 'dust.' These are the smallest particles left over from the processing of orthodox tea production. Because these fragments are so small, they tend to brew very quickly, which often results in an overly strong, sometimes astringent or bitter cup because the flavor extracts too rapidly and aggressively from the dense confinement of the flat pouch.

What leaf particle type typically fills traditional, standard tea bags?
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