Breaking Up Clumps and Sun-Drying: The Day the Tea Dries
If kill-green decides whether a pu'er is clean, sun-drying decides whether it's "pu'er" at all. Pu'er's raw material is called shaiqing maocha (sun-dried green maocha), and the key lies in that word "shai," sun-drying.
Why Break Up Clumps After Rolling?
During rolling, juice is squeezed onto the leaf surfaces and the leaves stick together into balls. If they're spread straight out to dry, the outside of each clump dries while the middle stays wet, developing a sour or stuffy smell, and in bad cases mold.
So after rolling, the clumps are broken up first: shaken loose and pulled apart by hand, or broken up by a declumping machine, so every strip is separate. This has to be done while the leaves are still damp and soft; if they're too dry, pulling them apart breaks the strips.
How the Tea Is Dried
The declumped leaves are spread in a thin layer on bamboo trays, bamboo mats, drying cloths, or concrete drying yards, letting sun and air carry the moisture away:
- Spread thin: Even thickness, no piling up.
- Turn: Turn gently every so often so the upper and lower layers get even sun.
- Watch: When the strips go from soft to stiff, the color turns dark green or grayish green with yellow, a handful rustles, and a strip snaps when bent, it's about dry.
How Long Does It Take?
It depends on the weather, the strength of the sun, how thick the leaves are spread, and how much moisture they hold. On a sunny day with plenty of sun, it takes about half a day to a day; on overcast days or when mornings and evenings are cool, it may take 2 days or more. Tea farmers often say drying tea means "depending on the sky for your living."
What's the Moisture Content After Drying?
Yunnan's pu'er processing technical code uses drying to below 10% moisture as the benchmark; the Yunnan Tea Circulation Association's 2021 group standard Sun-Dried Tea (Large-Leaf Variety) likewise sets the upper moisture limit for sun-dried tea at 10%. Maocha that isn't dried thoroughly tends to reabsorb moisture and turn stuffy once bagged, and can even go moldy.
What About Rainy Days?
Yunnan's rainy season begins after May, and drying tea becomes tea farmers' biggest headache. Common ways of coping:
- Drying sheds (sunrooms): Sheds built of clear plastic sheeting or glass that let sunlight in but keep rain out, very widespread now.
- Indoor spreading: Spread thin in a ventilated room to dry slowly in the shade, then finished in the sun once it clears.
- Low-temperature assisted drying: A few use warm, not very hot air to help, avoiding high-temperature baking as much as possible.
Maocha made in the rainy season depends even more on the farmer's skill, which is one reason summer tea varies more in quality; see Spring Tea, Summer Tea, and Autumn Tea.
Shade-Drying, Drying Sheds, and Baking Compared
| Method | Temperature | Effect on the tea |
|---|---|---|
| Sun-drying | Leaf temperature mostly below 60°C | The authentic shaiqing method, with a sun-dried note and retained potential for transformation |
| Drying shed | A bit higher than open air, depending on ventilation | Rain-proof, but can get stuffy with poor ventilation |
| Shade-drying | Room temperature | Dries slowly; spread too thick, it gets a stuffy smell |
| Baking | High hot-air temperatures | Dries fast with a lifting aroma, but becomes "hongqing" (baked green tea) |
The common view in the industry is that sun-dried tea is dried below 60°C, while hongqing is baked quickly with high-temperature hot air. High heat deactivates the leaves' enzymes and some of their constituents, and tea drinkers generally find that baked tea has a high aroma when young but transforms rather flatly with storage, which is why pu'er's national standard specifies sun-dried raw material. How to tell the three apart is in Sun-Dried, Baked, and Pan-Fired Green Tea: Why Pu'er Must Be Sun-Dried.
What Is the "Sun-Dried Taste"?
Sun-dried maocha often carries a scent like dry hay or a quilt that's been aired in the sun, which tea drinkers call the "sun-dried taste" or "sunshine taste." It's one of the hallmarks of sun-dried tea, more noticeable in young tea, and blends into other aromas after a few years of storage.
After Drying
The dried maocha is packed into burlap or woven sacks and sent to a factory or warehouse. From there it can be sold directly as loose tea, refined and pressed into cakes, or pile-fermented into ripe tea. The next step, sieving and sorting, is in Sieving, Sorting, and Picking Out Huangpian.
The Rhythm of a Drying Day
A sunny drying day goes roughly like this: tea kill-greened and rolled the night before is spread indoors overnight; in the morning, once the sun is up, it's declumped and spread on the drying yard; around noon, when the sun is strongest, farmers turn it a few extra times so both sides get even sun; in the afternoon they check the strips, gathering what's thoroughly dry first and leaving the rest in the sun; and in the evening, before temperatures drop and the dew rises, everything must be brought indoors to keep it from reabsorbing moisture overnight. This rhythm plays out again and again in Yunnan's mountain villages every tea season.
FAQ
Why break up clumps after rolling? After rolling, the leaves stick together in clumps; if they're not shaken loose, the middle won't dry, developing a sour smell or even mold.
How long does it take to sun-dry tea? About half a day to a day on a sunny day, longer when it's overcast, depending on sunlight and how thickly the leaves are spread.
What's the moisture content after drying? Both Yunnan's code and group standard use below 10% as the benchmark.
How is tea dried on rainy days? Mostly in clear drying sheds, or spread indoors to dry in the shade, then finished in the sun once it clears.