The Ancient Tea Processing Journey: Six Stages to a Perfect Batch

From the same tea plant, harvested on the same day, a tea master can produce refreshing white tea, sweet black tea, or deep Pu-erh. The difference lies entirely in the processing — specifically, how and when the tea maker intervenes in the leaf's oxidation process.

Below are the six fundamental stages that a batch of ancient tea undergoes.

Hand-picked early in the morning, before the dew completely dissipates. The standard is typically one bud and two leaves: the young bud along with its two adjacent leaves. For special batches, only one bud and one leaf are picked.

After picking, the buds are placed in airy bamboo baskets, not compressed, and never in plastic bags — leaves that are crushed and lack air will acquire an undesirable smell on the way to the factory.

From the tea bush to the factory usually takes no more than a few hours. This is why the processing factory must be located directly within the growing region.

Leaves are spread thinly on bamboo trays in a well-ventilated area, away from harsh sunlight, for 8 to 18 hours depending on the weather and the type of tea.

The leaves lose moisture, soften, and aroma compounds begin to form. For white tea, wilting is almost the entire processing stage: slow wilting, natural drying, no pan-firing, no rolling.

Leaves are pan-fired in a hot iron wok to halt the oxidation process at precisely the right moment. The heat and timing must be exact: too little heat leaves the tea with a 'green' taste, too much burns it and destroys the aroma.

This is the most difficult stage, depending almost entirely on the hands and eyes of an experienced tea maker.

Green tea and raw Pu-erh (sheng pu-erh) both go through this step; black tea does not, as black tea needs to be almost completely oxidized.

Rolling gently bruises the cell walls, bringing essential oils to the leaf surface and shaping the tea leaves. Hand-rolling is done in circular motions, with moderate force, resting between rounds.

Too much rolling crushes the tea, resulting in cloudy, astringent liquor. Too little rolling means slow extraction when brewed, yielding a thin flavor.

For black tea, after rolling, the leaves are piled and kept warm to continue oxidizing, until they turn a coppery-red and develop a honey-like aroma.

For ripe Pu-erh (shou pu-erh), leaves are piled in controlled warm and humid conditions, turned regularly for several weeks.

Finally, all teas are dried — either gently sun-dried or machine-dried at low temperatures — until their moisture content is about 5%. This is the threshold for long-term storage without mold.

Dried tea is hand-sorted: removing old stems, broken leaves, and impurities. One kilogram of finished tea can take hours to sort.

Afterward, the tea is tasted to classify the batch: even from the same region and season, two different pan-frying sessions will yield two distinct flavors and are recorded separately.

Each box of Việt An Trà tea lists the batch name and harvest season, so you know where and when your cup of tea originated.

Machinery ensures stable and consistent output. However, for ancient tea trees scattered in the forest, where seasonal yields are measured only in tens of kilograms, the advantage of machines diminishes significantly.

What remains is the experience of the tea master — the factor that determines whether this year's batch is better or worse than last year's.