Why comparison is the whole method
A single cup gives you an impression with nothing to measure it against, and impressions of unfamiliar things are unreliable. Two cups side by side give you a difference, and differences are what a palate can actually detect and remember. This is why professional evaluation is always comparative, why every serious tasting is set up as a flight, and why the most common piece of advice in this catalogue is to hold one variable and change another. It also explains a frustration many people have with tea: drinking good teas one at a time over months produces very little accumulated knowledge, because each is being judged against a memory rather than against a cup. The fix costs nothing but arrangement. There is a further reason comparison works that is worth making explicit. Human sensory judgement is much better at detecting differences than at assigning absolute values, so a taster asked whether cup A is sweeter than cup B will be reliable where the same taster asked to rate the sweetness of a single cup will not. Every method in this catalogue that produces knowledge — flights, single-variable adjustment, side-by-side brewing — is exploiting that asymmetry rather than requiring any special sensitivity.
What a sample is and what sizes exist
Most speciality sellers offer samples in the region of five to twenty-five grams, sometimes as a fixed set and sometimes as a smaller size of anything in the range. Five to ten grams is enough for two or three sessions, which is the right amount for a comparison; twenty-five grams is enough to learn a tea properly and to brew it several ways. Sample sets built by the seller are useful as a first purchase because they usually hold a variable deliberately, and are less useful later because you cannot choose the axis. Per gram, samples cost more than the full size — that is the trade, and it is a good one, because the alternative is a hundred grams of something you do not want. Availability of samples is also a signal about the seller, since a shop confident in its tea benefits from being compared. Sample packaging is worth noticing as well. A sample sealed in a laminate sachet is well protected and can sit for months; a sample in a paper envelope or a zip bag is exposed and should be drunk soon. Since samples are frequently bought several at a time and worked through slowly, the packaging determines whether the last of them is a fair test of the tea or a test of how it was stored in a drawer.
Designing a flight that teaches something
Change one thing. Three teas of the same category from three origins tells you what the origins do. The same cultivar from two countries — Jin Xuan from Taiwan and from Thailand, Yabukita from two prefectures — tells you what place does when the plant is held constant. The same tea at two roast levels, or the same garden across two flushes, or a sheng at three ages, each isolate one variable. Flights that change everything at once — a green, a black and a pu-erh together — are enjoyable and teach only that these are different, which you knew. Three teas is the practical maximum for a first attempt, because palate fatigue arrives faster than people expect and four cups of anything astringent is where attention stops working. A different and equally useful flight holds the tea constant and changes the brewing: the same leaf at two temperatures, two ratios or two steep times. This costs nothing at all, requires no purchase, and answers questions about your own equipment and water that no seller can answer for you. Alternating between the two kinds of flight — teas held constant, brewing held constant — is how a drinker separates what the tea is doing from what they are doing to it.
How to run it
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Same water, same temperature, same vessel type, same leaf-to-water ratio, same timing, brewed simultaneously rather than in sequence. Any variable left uncontrolled will be attributed to the tea. Use identical vessels if you have them, and if you do not, at least identical volumes. Smell the dry leaf of all three before brewing, then the wet leaf of all three after the first infusion, then taste, moving between cups rather than finishing one. Take a second infusion, because teas that are similar in the first can diverge sharply in the second. Write three words per tea and nothing more — the value is in being forced to choose between malty and toasty, not in the note itself. Plain water between cups, and stop before you stop being able to tell them apart. Blind tasting is worth attempting occasionally and is more revealing than most people expect. Having somebody else pour, or simply shuffling covered cups, removes the effect of price and expectation, which are substantial and operate whether or not the taster believes they are immune. A blind comparison between an expensive tea and a modest one from the same category is the single most instructive exercise in this catalogue, and its results are frequently uncomfortable.
What comparative tasting is actually for
Three things, and none of them is producing good descriptions. It calibrates: after tasting three green teas together you know what the range is, which makes every green tea afterwards placeable. It isolates preference: you learn that what you dislike is roast, or smoke, or astringency, which is a filterable fact worth years of money. And it exposes brewing: a tea that comes out badly next to two that come out well is usually being brewed wrong, which is much harder to notice one cup at a time. A fourth benefit is negative and useful — a comparison will sometimes show that an expensive tea and a modest one from the same category are much closer than the price implies, and that finding transfers to every future purchase in that category. It also builds a reference set, which is what makes descriptions usable. A tasting note is a pointer to a resemblance, and a pointer only works if the reader has encountered the thing pointed at, so every comparison a drinker runs makes every future description more informative. This is why the vocabulary of experienced tasters seems to arrive fully formed: it did not come from reading a flavour wheel, it accumulated from cups placed beside other cups.
Building a habit rather than an event
The version that works long-term is small and frequent: two teas, side by side, once a week, using leaf you already own. It requires no purchase and no ceremony, and it produces more learning than an occasional elaborate tasting because the comparisons accumulate. Keep the notes in one place so that last month’s three words are available, and re-taste teas you have already judged — palates change, and a tea dismissed early is often the one that becomes interesting once there is a frame for it. The purchasing rule that falls out of all this is the one in `guide-s31h-how-much-to-buy`: sample first, commit second, and let the comparison rather than the description decide. One caution about frequency: palates fatigue within a session and recover between them, so two teas twice a week teaches more than eight teas once a month. Astringent and heavily roasted teas fatigue the palate fastest, which is worth accounting for when ordering a flight — put the delicate tea first, and stop when the differences stop being obvious rather than when the cups are empty.