Negative Terms: Sour, Moldy, Stuffy, Coarse, Throat-Prickling, Throat-Locking, Lingering Bitterness
Tasting isn't only about finding strengths; being able to name the flaws is what it means to truly understand a tea. Some of these negative terms describe defects in the tea itself, and some are caused by storage or brewing. Know what they mean, and when you drink a tea that seems off, you'll be able to say what the problem is and how to deal with it.
Sour (酸)
What it is: A sour sensation in the liquor or aroma.
How to tell kinds apart:
- Slight, refreshing fruity acidity: Part of some raw teas' flavor, not a flaw.
- Slight sourness in new ripe tea: Left over from wodui; it often fades after 1–2 years of ventilated storage.
- Pungent sourness with a damp note: From damp storage; a flaw.
Example: A tea kept in a damp cabinet that smells sour and stuffy when opened and brews a dull liquor: that's sourness from moisture.
Moldy (霉)
What it is: A pungent, musty smell like moldy bread or a damp corner of a wall.
Where it comes from: Storage with humidity too high and poor ventilation, so the tea grew mold. You may see white, green, or yellow fuzzy spots on the surface of the dry leaf.
How moldy differs from sour:
| Moldy | Sour | |
|---|---|---|
| Smell | Musty, pungent, like something moldy | Sour; may be refreshing or pungent |
| Source | Mold growth | Fermentation residue, early moisture damage, or the flavor itself |
| Can it fade? | No; the tea has spoiled | Slight cases may fade |
| Recommendation | We don't recommend drinking it | Judge by the cause |
How to identify mold is in How to Identify Mold, and the difference between aged aroma and mold is in Storage Taste, Aged Taste, and Mold.
Stuffy (悶)
What it is: An airless, unrefreshing smell, like a closed room or a hot, stuffy closet, or like the stewed smell of vegetables cooked too long under a lid.
Where it comes from: Insufficient spreading during production, or not spreading to cool promptly after pan-firing; storage sealed too tightly; or leaving the lid on while brewing.
Can it fade?: Slight stuffiness from storage often clears after some time in a ventilated environment; stuffiness from production is harder to remove.
Coarse and Mature (粗老)
What it is: A rough smell like dry straw, old leaves, or wood shavings, with a weak, coarse taste.
Where it comes from: Raw material on the mature side, with fibrous leaves and little substance. It often comes with a coarse mouthfeel and stiff spent leaves.
Example: An inexpensive brick tea with large, old leaves that brews with a dry-hay smell and a thin, coarse liquor: that's coarse and mature.
How it differs from woody aroma: Woody aroma is the clean, calm woody scent of aging, while coarse and mature is the dry-hay roughness that comes from the raw material itself.
Throat-Prickling (刺喉)
What it is: A prickly, itchy, scraping feeling in the throat as you swallow, as if something fine were brushing past.
Common causes: Ripe tea recently out of the pile or incompletely fermented; damp or improper storage; tea that's too hot or too strong.
Can it fade?: The throat-prickling of new ripe tea often improves after some time in storage; whether storage-caused prickling fades depends on its severity.
Throat-Locking (鎖喉)
What it is: A feeling as if the throat is being squeezed and tightened; it feels dry and tight after swallowing, and swallowing doesn't go smoothly.
Common causes: Coarse, mature raw material, improper processing (such as insufficient pan-firing), too many astringent components, or off-flavors from storage.
How it differs from throat-prickling: Locking is "tight," prickling is "scratchy." Both make the throat uncomfortable; details are in Throat Feel: After You Swallow.
Bitterness That Won't Dissolve (苦不化)
What it is: Bitterness that stays on the tongue, remains after swallowing, lingers for a long time, and isn't followed by huigan.
How it differs from "bitterness that dissolves quickly": Good tea can be bitter too, but the bitterness fades within seconds and turns into huigan; bitterness that won't dissolve gets stuck.
Common causes: Raw material that's naturally heavily and persistently bitter; improper processing; brewing too strong and too long.
Example: With the same tea, pouring off at 5 seconds lets the bitterness dissolve, but pouring off at 1 minute leaves bitterness stuck at the back of the tongue: that's lingering bitterness caused by brewing. If it sticks no matter how you brew it, it's the tea's character.
Other Negative Terms
- Astringency that won't fade (澀不化): The astringency never recedes, and the mouth gets drier with every sip.
- Grassy (青味): A raw, green-grass taste from insufficient pan-firing.
- Smoky or burnt (煙焦): Smoky or burnt notes from pan-firing or drying temperatures that were too high.
- Watery (水味): The liquor tastes like water, and the flavor doesn't blend.
- Muddled (雜): The aroma or taste is mixed with other smells and isn't pure.
- Foreign odor (異味): The tea has absorbed outside odors, such as mothballs, cooking fumes, or perfume.
- Carbonized (碳化): Over-fermented ripe tea with stiff, brittle, blackened spent leaves.
The sources and handling of these are explained in more detail in Off-Flavors and Defects.
Which Fade with Storage?
| Flaw | After storage |
|---|---|
| Pile aroma, slight sourness, throat-prickling in new ripe tea | Often improves noticeably after 1–2 years of ventilated storage |
| Slight storage taste, paper smell | Often fades after airing |
| Slight smokiness | Often weakens after several years |
| Moldy smell | Doesn't fade |
| Coarse and mature, carbonized | Doesn't fade (determined by raw material and processing) |
| Heavy foreign odors | Very hard to remove completely |
FAQ
What is throat-locking? A feeling as if the throat is squeezed, tight and dry, often due to coarse, mature raw material, improper processing, or too many astringent components.
What is throat-prickling? A prickly, itchy feeling in the throat, as if something scraped past; common in new ripe tea fresh from the pile or improperly stored tea.
What is bitterness that won't dissolve? Bitterness that stays on the tongue for a long time without huigan following; it may be the tea's character or the result of brewing too strong and too long.
What is a coarse, mature taste? A rough smell like dry straw or old leaves, coming from raw material on the mature side.
How do I tell moldy from sour? Moldy is musty and pungent, meaning the tea has spoiled; sour may be part of the flavor or fermentation residue, and only a pungent, damp sourness indicates moisture damage.