The four stations, and what each is for
A systematic tasting has four points of observation and the liquor is only one of them. The dry leaf shows the manufacture — size, uniformity, wholeness, colour, the presence of tips and stems — and gives the most volatile part of the aroma. The wet leaf after the first infusion shows the raw material and the processing in a way nothing else does. The liquor gives taste, mouthfeel and aftertaste. And the empty cup holds the heavier aromatics after the tea has gone. Working through all four takes a couple of minutes longer than drinking the tea, and it converts a session from an impression into an inspection. Professional evaluation is built on exactly this sequence, with a standardised brew so that the comparison across the four stations is fair. There is a fifth observation that runs across all four, which is change. A tea’s dry leaf, wet leaf, liquor and empty cup all differ between the first infusion and the fourth, and the pattern of that change is often more informative than any single reading. A tea that is identical across four steeps is telling you something, and so is one that transforms. Attending to the sequence rather than to a snapshot is what separates a tasting from a drink.
The dry leaf
Look for uniformity first, because it is the easiest thing to judge without expertise and it tells you the most about care in production. A lot that is one thing — one size, one colour, one shape — was sorted and handled attentively; a lot with large pieces and dust together will extract unevenly no matter how it is brewed. Then look at wholeness and condition: intact leaf that is crisp rather than crumbling, and stems and mature leaf in the proportion the style implies. Colour tells you about freshness for green and lightly oxidised teas, and about roast and age for oolongs and dark teas. Smell it cold, then warm a little in a preheated vessel and smell it again, because gentle warmth releases far more and a leaf with nothing to release is telling you it is faded. Weight and sound are worth adding to the list because they are free. Well-fired, properly dried tea is light and rattles crisply in a tin, while leaf that has taken up moisture feels softer, sounds duller and does not snap when pressed. This is the quickest available check on whether a tea has been stored well, it takes a second, and it is the check that most reliably explains a cup that came out flat for no other visible reason.
The wet leaf, which is where the evidence is
After the first infusion, tip the leaf out where you can see it and spread it. Now the plucking standard is visible: buds, single leaves, leaf-and-two, or coarse mature material with woody stem — and whether the lot is consistent. The colour of the leaf shows how far oxidation went and whether it went evenly, and in oolongs the classic red rim on a green centre is directly readable. Tears, bruising and crushed edges show handling. In a rolled tea, whether the leaves opened fully shows both the manufacture and whether your brewing gave it enough. And the aroma of the warm wet leaf is the richest of the session, holding compounds that never reach the cup. None of this requires any special knowledge to begin with, because most of it is comparison: two teas’ wet leaf side by side is immediately legible in a way one alone is not. A cha he or any shallow pale dish makes this far easier than examining leaf in the brewing vessel, because the leaf can be spread out and seen against a light background. Professional cupping sets include a lid that the infused leaf is turned out onto for exactly this purpose. Nothing about the practice requires special equipment, and a white plate does the job — the barrier is remembering to do it at all rather than owning anything.
What the wet leaf reveals that the cup hides
Specific things, and they are hard to detect any other way. Blending of different material into one product shows as a wet leaf that is visibly two or more populations. Over-oxidation before firing shows as brown patching where a green tea should be uniformly green. Scorching during pan-firing or a too-hot roast shows as blackened edges. Machine harvesting shows as cut ends across the leaf rather than the clean break of a hand pluck. A tea sold as bud-only that is mostly leaf is exposed immediately. And in pu-erh, the wet leaf is central to evaluation: colour, elasticity, whether the leaf is supple or brittle, and whether the material is uniform all bear on questions about age, storage and origin that the liquor answers only vaguely. There is also information about your own brewing in it. Leaf that has not fully opened after several infusions was under-hydrated, crowded in the vessel or brewed too cool for its style, and a rolled oolong that is still partly closed at the end of a session was never going to give what it had. Reading the spent leaf is therefore a check on the brewer as much as on the tea, and it is the feedback most sessions never collect.
The empty cup
Once the liquor has gone, the warm empty vessel holds the less volatile aromatics — the ones that persisted rather than the ones that flashed off — and it is often the clearest aromatic signal of the whole session. For fragrant oolongs this is important enough that a separate tall narrow aroma cup exists in some gongfu practice, poured, emptied into the drinking cup and then smelled. The same information is available from any cup by smelling it after finishing. It is worth doing at several points, because the empty-cup aroma changes across infusions and its persistence is a quality signal in itself: a cup that still smells of the tea some minutes later is reporting something a cup that goes neutral immediately is not. The vessel matters here more than anywhere else in the sequence. Unglazed clay holds aroma in a way porcelain does not, which is why clay is dedicated to a single category and why an aroma assessment made in a seasoned clay cup is partly an assessment of the cup. For evaluation the neutral vessel is the right one, and for enjoyment the seasoned one may be preferred — but the two answer different questions and should not be mixed within a comparison.
Making the comparison fair
Everything above works by comparison, so the brewing has to be controlled or the observations are worthless. Same water, same temperature, same ratio, same vessel type, same timing, and the teas brewed simultaneously rather than in sequence. Professional cupping standardises all of this deliberately and brews harder than anyone would drink — a long steep at a fixed ratio — precisely because the goal is to expose faults rather than to make a pleasant cup. That is a useful trick to borrow occasionally: a deliberately over-brewed cup shows a tea’s weaknesses clearly, and a tea that survives it is telling you something. For ordinary tasting the point is milder. Hold everything constant except the one thing you are asking about, and let the four stations report. Order and timing matter as much as the parameters. Brew simultaneously rather than in sequence so that both cups are the same age when tasted, taste the more delicate tea first, and cleanse with plain water between. Notes should be written before discussing the tea with anyone else, because sensory judgements converge rapidly once spoken aloud — which is pleasant socially and destroys the independence of the comparison.