What is being graded, and by whom
After orthodox manufacture, finished tea is sorted — sifted through meshes and separated by size, and in some factories further separated by density or by tip content. The letter grade names the fraction that came out of that sorting. Three consequences follow immediately and are the source of most of the confusion. The grade describes the sorted fraction, so a single day’s production yields several grades from the same leaf, the same garden and the same maker. The grade is assigned by the producer or the broker, not by an external body, so no authority defines it and no certificate exists. And because it describes appearance, it is evaluated dry, before anything has been brewed. A grade is therefore a specification of what the leaf looks like, written by the person selling it, and read that way it is genuinely informative. The grading vocabulary also has a commercial function that explains its persistence. Tea sold at auction or by sample to buyers who will never see the garden needs a shared shorthand for what is physically in the chest, and the letter system supplies exactly that: a broker, a blender and a packer can agree what a BOP consignment will look like without discussing flavour at all. Read as trade shorthand between professionals it works well. Read as a consumer quality mark, which is how it reaches most buyers, it does not.
The base terms: pekoe, orange pekoe, souchong
Pekoe is the root of the system, and the etymology usually given traces it to a Chinese term for the fine white down on an unopened bud, carried into English through the tea trade. In the grading system it names a leaf grade rather than a bud: P, plain pekoe, is a shorter, coarser, more tightly rolled whole leaf. OP, orange pekoe, is the long, wiry, whole-leaf grade at the top of the base ladder. Souchong denotes a larger, coarser leaf from further down the shoot. The word orange has no settled explanation; the frequently repeated derivation from the Dutch House of Orange circulates widely and TeaHQ has not found it substantiated, so it is best reported as folk etymology rather than as history. What is not in doubt is that neither word describes flavour, colour or citrus, and that orange pekoe is a leaf size. A related confusion is worth clearing up because it appears constantly in retail copy. Orange pekoe is frequently presented as a type of tea, so that a packet is sold simply as Orange Pekoe with no origin, no grade beyond the two words and no other information. That is a leaf-size designation being used as a product name, and it tells a buyer nothing except that the leaf is whole and long. Where those two words are the most specific thing on a packet, there is nothing more specific to know.
The prefixes, and what each one adds
The letters accumulate in front of OP and each names a physical feature. F, flowery, indicates the presence of tips — the unopened buds. G, golden, indicates that those tips are golden in colour, which in a fully oxidised tea comes from the downy bud material oxidising differently from the leaf. T, tippy, indicates an abundance of them. FT, finest tippy, and S, variously read as special, super or supreme, are the producer’s own superlatives at the top of the stack. So FTGFOP unpacks as finest tippy golden flowery orange pekoe: a long whole-leaf grade with a high proportion of golden tips. A numeral 1 appended, as in FTGFOP1, is a further producer-assigned distinction meaning the best of that grade from that factory. Every letter in the chain is a statement about what is visible in the dry leaf, and none of them is a statement about the liquor. Because the superlatives at the top of the stack are producer-assigned, they inflate over time in the way any unregulated superlative does — which is how a vocabulary that began with pekoe and orange pekoe ended up with six letters and a numeral. There is no authority to stop the addition of another letter, and comparing the top grade of one factory with the top grade of another is comparing two independent claims. Within a single producer’s range, by contrast, the ladder is meaningful and consistent, because one person assigned all of it.
The broken, fannings and dust grades
Below the whole-leaf grades sit the smaller fractions, named on the same system with B for broken and F for fannings. BOP is broken orange pekoe; BOPF is broken orange pekoe fannings; PD and D denote dust grades. Sri Lankan practice adds its own designations such as OP1, OPA and BOP1, which are not interchangeable with Indian usage. These are size fractions rather than rejects: they come from the same manufacture as the whole-leaf grades and are separated because they behave differently in the pot. They extract much faster, produce a darker and brisker cup in less time, and are consequently what most of the world’s bagged tea is made from. Reading them as inferior misses the point of the sorting, which was to put material of consistent size into each package so that it brews predictably. The letter S in front of a grade code needs care because it does two jobs. In the whole-leaf chain it stands for a producer superlative, as in SFTGFOP. Elsewhere it denotes souchong, a coarse large-leaf grade. Context disambiguates for anyone in the trade and not for a shopper, which is one more reason to read a grade as a description of physical appearance rather than as a code to be decrypted into a quality position.
Why a grade is not a quality score
Because everything it measures is compatible with a bad tea. A leaf can be long, whole, wiry and abundantly tipped and still come from a poor plucking, a mishandled wither, a rushed oxidation or a year of bad weather — and the grade will be the same. Conversely, plenty of excellent tea is not tippy: a fine Assam second flush and a fine Keemun are judged on quite different things, and tips are not always desirable in the first place, since bud material carries a distinct character rather than a better one. The grade narrows the range of what a tea can be by telling you its physical class; it does not place the tea within that range. This is why professional buyers grade and then taste, and why a buyer who has only the grade has done the first half of the job. There is a specific way this misreading costs money. Because tips are visible and letters are printable, the tippy grades attract a premium that is partly aesthetic, and a tea can be selected and priced for tip content that a drinker would not have paid for had they tasted it blind. Bud material carries a distinct light sweetness and comparatively little body, so a very tippy black tea can be delicate where a buyer expecting the top of a ladder wanted depth. That is a mismatch of expectation created entirely by reading appearance as rank.
The systems are not comparable between origins
The letter system belongs to the orthodox black tea industries of India, Sri Lanka, Bangladesh, Kenya and their neighbours, and its terms mean nothing outside them. Chinese grading is per tea type and generally numerical or descriptive — a numbered ladder within a named tea, or terms specific to that tea such as the Hao Ya designations used for Keemun — and picking date frequently outranks any grade as a quality signal. Japanese classification is by product type and harvest rather than by leaf appearance, with steaming depth as a style descriptor. Korean grading is by picking date outright: ujeon, sejak, jungjak, daejak. Chinese white tea uses a picking ladder from buds only down to mature leaf, which as `guide-understanding-tea-grades` notes actually inverts for ageing purposes. Applying the expectations of one system to another produces nonsense, and the letters in particular have no equivalent anywhere in East Asia. The incomparability runs in a second direction as well, which is between producers within the same system. Because grades are self-assigned, one estate’s FTGFOP and another’s are two independent statements, and the ladder is only reliable within a single producer’s range. This is why buyers who work with the letter grades professionally always pair them with a garden name and an invoice number, and why a grade quoted without a producer is close to meaningless even inside the system it belongs to.
How to use a grade well
Read it as a description of what will come out of the packet. A whole-leaf grade tells you the leaf will need room to open, will extract more slowly, and will suit a pot rather than a bag. A broken or fannings grade tells you the opposite and warns you that the same steeping time will produce a much stronger and more astringent cup. Tip content tells you to expect a particular kind of sweetness and lightness that some drinkers want and others do not. Then set the grade aside and use the fields that actually predict character: origin at district level, harvest year and season, cultivar where stated, and processing detail. A seller who supplies those is telling you more than one who supplies four more letters, and the letters were never trying to tell you that in the first place. A final practical note: where a packet gives a grade, it is worth checking the leaf against it. A whole-leaf grade printed on a packet of visibly broken material is a straightforward inconsistency, and it is one of the few label claims a buyer can verify without any expertise by tipping the packet out. Grades are physical descriptions, which makes them the most checkable of all the voluntary fields — and checking one occasionally is a reasonable way to decide how much to trust the rest of a seller’s copy.