What blinding actually removes
Not subjectivity, which is not a thing that can be removed, but a specific set of influences that act on sensory judgement independently of the liquid. Price is the largest and best documented: a drink believed to be expensive is rated more highly, and the effect operates on people who know about it. Provenance and reputation act the same way, which is why a famous garden name or a claimed age changes a judgement before the cup is lifted. The seller’s description acts as a prompt, and a note read beforehand is very likely to be found. And in company, whoever speaks first anchors everybody else. Blinding removes all of these at once and leaves the taster with the liquid and their own attention, which is the condition under which a comparison actually tests something. It does not make anybody a better taster, and it does not settle what is good — it settles what a taster prefers when the reasons to prefer one thing have been taken away, which is a narrower and more useful question than it sounds.
How to run one at home
Two or three teas, brewed simultaneously at identical parameters — same water, same temperature, same ratio, same vessel type, same timing — poured into identical cups, and somebody else assigning the cups to letters and keeping the key. Where there is nobody else, cover the cups, shuffle them and write the order face down before starting. Smell all the cups before tasting any, then taste moving between them rather than finishing one, then take a second infusion, because teas that are similar in the first frequently diverge sharply in the second. Write three words for each cup and a preference order before revealing anything. Keep the number small: palate fatigue arrives faster than people expect, four cups of anything astringent is where attention stops working, and a blind tasting of six teas measures endurance rather than perception. Plain water between cups, delicate before assertive, and stop when the differences stop being obvious rather than when the cups are empty.
Comparisons worth running blind
The expensive one against the modest one from the same category, which is the classic and the most uncomfortable. The same tea at two ages, or from two years, which tests whether a storage or vintage belief survives contact. Two grades from one seller’s range, which tests whether the ladder they sell corresponds to anything you can detect. A famous name against a well-described tea from a neighbouring area, which is the question the substitution pages raise and which price alone cannot answer. Your own habitual brewing against a parameter you have been told is better, which is the cheapest of all since it needs one tea. And the same tea in two waters, which settles the water question that underlies so many other disagreements. In every case the design principle is the one that governs all tasting in this catalogue: hold everything constant and change one thing, because a comparison that changes several things at once produces an impression rather than a finding.
What a blind result does and does not establish
It establishes what that taster preferred, on that day, at those parameters, among those teas. That is a real finding and it is narrower than it feels in the moment. It does not establish that a tea is better in general, because a tea that shows poorly at one set of parameters may be excellent at another and because a single tasting is a single observation. It does not settle whether a price is justified, since price reflects scarcity, labour, storage and reputation as well as quality, and a buyer may reasonably pay for provenance. And it does not transfer between people, for all the reasons the disagreement page gives. What it does reliably do is expose the cases where a preference was being supplied by the label rather than by the cup, and those cases are common enough that finding one or two changes how a person buys for years. The honest framing is that a blind tasting is an experiment with a small sample and a clear control, and its value is that most tasting has neither.
The harder version, and why it is worth knowing about
Formal sensory evaluation uses designs that answer sharper questions than a preference ranking. The most useful for a household to know about is the triangle arrangement: three cups, two of which are the same tea and one different, with the taster asked only to identify the odd one out. It answers whether a difference is detectable at all, which is a different and often more interesting question than which is preferred — and it is the right design for questions such as whether a water change, a temperature change or a storage difference actually produces a perceptible result. Run properly it requires more repetitions than anyone will do at home to mean much statistically, and TeaHQ states that plainly rather than presenting a single triangle as proof of anything. Even run once and informally it is instructive, because a taster who cannot reliably pick the odd cup has learned something about the size of the difference they had been confidently describing.
Why so few people do it
Because the results are frequently unwelcome and the setup is mildly inconvenient, and because blind tasting removes part of the pleasure of tea, which is genuinely a cost rather than a rationalisation. Knowing what you are drinking, where it came from and what it cost is part of why people enjoy tea, and a session run blind is an experiment rather than an evening. The reasonable position is therefore not to drink blind but to run one occasionally, for a specific question, and then to go back to drinking with the labels on. It is also worth being clear that a taster who finds their preferences unchanged by blinding has learned something reassuring, and one who finds them reversed has learned something valuable, and neither outcome is a judgement on them. The only bad outcome is never running one and continuing to attribute to the leaf what was being supplied by the price tag, which is the position most tea drinkers are in and the reason this page exists.