What is oolong tea?
Oolong is the category where oxidation is deliberately halted part way, and it is the only one where the maker chooses where on the scale to stop. That freedom is why it spans more ground than any other type.
tea type
What is being compared
Point by point
| Aspect | Oolong | Black tea |
|---|---|---|
| The defining decision | Oxidation is arrested somewhere between green and black, at the maker’s judgement. | Oxidation runs to completion. |
| How the leaf is treated | Bruised repeatedly so the edges oxidise while the centre stays green. | Rolled or cut so the whole leaf oxidises evenly. |
| Range within the category | Enormous. A light Baozhong and a charcoal-roasted yancha share little but a name. | Wide but bounded — all of it is fully oxidised. |
| Roasting | A second independent dial, applied after processing, and central to several styles. | Rare, and where present usually a drying decision. |
| Infusions | Six to fifteen in gongfu brewing; the arc across them is the point. | Usually one, occasionally two. |
The short answer
Oolong is the hardest category to generalise about and the most rewarding to explore, because two variables move independently rather than one.
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