CTC black tea

Where it grows

The districts recorded against this tea. Elevation is given as the band the district is recorded at, not a measurement of the garden this leaf came from.

• Barak Valley — 10–150 metres

  How firm this is: Inferred from general knowledge of the district rather than measured or taken from a source that states it.

How it is made, in order

Read top to bottom: the list is the production sequence, and the sequence is what makes this tea its category rather than a neighbouring one. The same leaf from the same bush becomes a green tea or a black tea depending on where the heat falls relative to the bruising, so reordering these steps would not vary the tea — it would produce a different one.

1. 1. Withering — Reduces water content, softens the leaf for later handling, and permits early enzymatic and aromatic development.
2. 2. CTC (crush, tear, curl) — Comprehensively ruptures and cuts the leaf into uniform granules, maximising surface area and speeding both oxidation and later extraction.
3. 3. Oxidation — Allows polyphenol oxidase to act on leaf polyphenols after cell rupture, converting them into the larger coloured compounds that give oxidised tea its colour and body.
4. 4. Drying — Reduces residual moisture to a level at which enzymatic, microbial and oxidative change effectively stops, stabilising the leaf for storage.

The route it is made by

The steps above are what happens; this is the named production route they belong to, with the other teas made the same way.

• CTC black tea — The orthodox route with one slot filled by a different machine, and every other decision in the route reorganised around what that machine needs.

  Where it is practised: Assam, Kenya, Rwanda, Uganda, Malawi, Sri Lanka's low grades, Indonesia, Argentina, and the great majority of Indian domestic production. Nearly every teabag in the world contains tea made this way.

What its chemistry turns on

Every true tea contains caffeine, catechins and amino acids, so listing them would say nothing about this one. What differs is what the processing above does to them — and that is the same list of steps, read for its chemistry instead of its craft.

The compounds that substantially decide what this tea is: Strecker aldehydes, Tea cream, Theaflavins.

• Withering
  • creates Geraniol
  • creates Linalool
  • creates Linalool oxides
  • creates Theasinensins
  • raises Methyl salicylate
  • raises Nerolidol
  • raises Soluble sugars
  • lowers cis-3-Hexenol
  • lowers Green-leaf volatiles
  • lowers Leaf lipids
• CTC (crush, tear, curl)
  • raises Tea cream
  • raises Theaflavins
• Oxidation
  • converts Carotenoids
  • converts Catechins
  • converts ECG (epicatechin gallate)
  • converts EGC (epigallocatechin)
  • converts EGCG (epigallocatechin gallate)
  • converts Epicatechin
  • converts Linalool
  • creates Beta-damascenone
  • creates Beta-ionone
  • creates GABA (gamma-aminobutyric acid)
  • creates Linalool oxides
  • creates Tea cream
  • creates Theaflavins
  • creates Thearubigins
  • raises 2-Phenylethanol
  • raises Geraniol
  • raises Nerolidol
  • lowers Anthocyanins
  • lowers Theogallin
• Drying
  • creates Strecker aldehydes
  • raises Beta-damascenone
  • raises Thearubigins

These are statements about the leaf and the cup. What any of these compounds does in a body is a different kind of question and is not answered here or on the pages linked from it.

History

Crush-tear-curl was developed by William McKercher in Assam in the early 1930s. It made the teabag commercially viable, and most tea drunk in the world is now made this way — a single machine design reshaping global consumption.

TeaHQ synthesis — TeaHQ's own reading of well-attested general knowledge, with no single source behind it.

Brewing

• Western brewing (teapot or mug)

  1–1.5 g/100 ml · 98–100 °C · 1 authored infusion

  Needs: Western teapot

  Open in the brew assistant

• Tea bag brewing

  1–1.5 g/100 ml · 95–100 °C · 1 authored infusion

  Open in the brew assistant

• Hong Kong milk tea (sock-strained)

  3–5 g/100 ml · 95–100 °C · 1 authored infusion

  Needs: Tea sock (cloth filter bag), Brewing saucepan

  Open in the brew assistant

• Sweet tea (American Southern style)

  4–6 g/100 ml · 95–100 °C · 1 authored infusion

  Needs: Brewing saucepan, Kettle, Cold brew bottle

  Open in the brew assistant

• Chai preparation

  2–3 g/100 ml · 98–100 °C · 1 authored infusion

  Needs: Tea strainer

  Open in the brew assistant

Vessels this tea suits

Recorded against the tea rather than against a brewing style, because the vessel does not always follow from the method — a whisk needs lateral room whatever the schedule says, and compressed leaf needs a pick before any method applies at all.

• Tea sock (cloth filter bag) — A long cloth bag on a wire hoop, used in Hong Kong tea houses and across South East Asia to hold and strain a strong tea brew, with the liquor poured through it repeatedly. It is called a stocking because that is what it comes to look like, stained deep tan by use; no stocking is involved.
• Kulhar (unglazed clay cup) — The cup the drink is served in on platforms and at roadside stalls across northern India — used once and broken.
• Tasting spoon — The auction taster’s tool: a deep wide bowl taken in one aerating slurp, which is how a bulk lot is judged.

Common mistakes

• Reading CTC as a quality grade rather than a manufacturing choice
• Brewing it for four or five minutes as though it were whole leaf

When the cup goes wrong

Written against black tea as a category rather than against this tea in particular, and worked back from the symptom to the likely causes in order. 19 apply to the category; the first 6 are shown.

• My chai catches on the pan or boils over — A scorched note runs through the finished drink, or the pan foams over the moment your back is turned.
• My chai is harsh and drying rather than rich — The drink is strong enough but unpleasant with it: a rough, drying grip on the tongue and a flat cooked note, rather than the round sweetness a good chai has.
• My chai tastes of hot spiced milk rather than tea — The drink is pleasant and sweet and the tea is nowhere in it — no colour to speak of, no briskness, and nothing that would tell you tea had been involved.
• My iced tea has gone cloudy — Tea that was clear when hot turns hazy or milky once chilled.
• My iced tea tastes watery once the ice melts — The tea is good for the first mouthful and thin by the bottom of the glass.
• My milk curdles or separates in the tea — Flecks or threads appear when the milk goes in, or the surface breaks into small islands, and the drink looks grainy rather than smooth.

Every diagnosed brewing problem

If you like this

Grouped by why they were suggested, strongest reason first. Nothing here is a blended score — a suggestion appears under the best reason that exists for it, and never under a weaker one as well.

Compare this tea with another

Written comparisons

Where TeaHQ has set this tea against another in full, rather than deriving the comparison. Each one is a written page with the points of difference argued out.

• CTC vs orthodox black tea — Two manufacturing routes for the same leaf, built for different jobs. Reading them as a quality ranking is the most common error in black tea. Put the two side by side
• CTC vs teabag tea — One is a manufacturing method and the other is a format, and treating them as the same thing is why 'teabag tea' gets blamed for things the bag did not do.
• Supermarket tea vs speciality tea — The gap is real and it is not where most people think. It is almost entirely about leaf grade and freshness rather than about origin or price alone. Put the two side by side

Botanicals this connects to

• Black cardamom — Used in the regional chai of the Himalayan foothills, where its smoke suits a strong CTC base.
• Nutmeg — Grated into spiced milk tea across the Caribbean and South Asia, where a little goes a long way.
• Allspice — The clove-dominant spice in Caribbean spiced teas and sorrel drinks, and a fixture of European mulled preparations.
• Vanilla — One of the two most common flavourings applied to black tea, and almost always as synthetic vanillin rather than as pod.

Where this tea is drunk

Documented practices that name this tea. Each page describes what is done and by whom, and separates what is recorded from what is repeated.

• Adda and the Bengali tea stall — A word for unstructured, purposeless, extended conversation, a stall that exists to host it, tea in a clay cup or with lemon and black salt, and a city where the tea shop functions as a piece of public infrastructure.
• Assam’s tea garden communities — The gardens of Assam were built with labour recruited from central India, and the descendants of those workers are now a distinct population of several million with their own language, festivals and politics — a producer culture that is almost never described as a culture.
• Bangladeshi tea customs — A tea-growing country whose gardens are concentrated in one corner, a street trade running on condensed milk and small glasses, a new smallholder industry in the far north, and a layered novelty tea from Srimangal that has become the country’s best-known tea story.
• British everyday tea drinking — Strong black tea with milk, made in a mug from a bag, drunk throughout the day — a domestic and workplace habit with its own etiquette, and almost nothing to do with afternoon tea.
• Cha chaan teng culture — Hong Kong's tea restaurants — fast, inexpensive, hybrid Cantonese and Western — where milk tea strained through a cloth bag is a house speciality and a competitive matter.
• Cha yen and the Thai tea stall — Bright orange sweet iced tea poured over a tall glass of ice from a cloth sock filter, sold from carts and stalls across Thailand — a drink whose defining colour comes from added colouring, and whose recipe is a piece of commercial formulation rather than a regional inheritance.
• Chai culture in India — Spiced milk tea as a daily household and street drink across South Asia, made in enormous quantity, with no authoritative recipe and very large regional and household variation.
• Chaiwallah and street tea culture — Tea sold from stalls, carts and railway platforms in very small glasses, at very low prices, in enormous volume — an infrastructure of public life rather than a hospitality offering.
• East African chai customs — Tea boiled in milk rather than water across Kenya, Tanzania and Uganda, spiced on the Swahili coast, cardamom-heavy in Somali practice — produced by the region and drunk from the grades that never leave it.
• Egyptian shai: koshary and saidi — Two Egyptian methods with the same leaf and opposite results — steeped and clear in the north, boiled hard and almost syrupy in the south — served in a glass with a great deal of sugar, in a country that drinks tea constantly and grows none.
• Iced tea in the United States — Most tea drunk in the United States is cold, and most of it is drunk with a meal in a very large glass with free refills — a national default so complete that hot tea reads as a foreign or medicinal choice, and an origin story about a world’s fair that is not true.
• Irani cafés and their chai — Zoroastrian migrants from Iran opened cafés in Bombay and Hyderabad that served strong milky tea to anybody who walked in, at marble tables under house rules on the wall — and both cities’ versions of the tea, and of the institution, are now shrinking.
• Irish tea drinking — Among the heaviest per-capita tea consumption anywhere, a stronger blend than the British one, a genuine north–south brand loyalty between Barry’s and Lyons, and tea as the fixed accompaniment to a death in the parish.
• Karak chai in the Gulf — Strong boiled milk tea with cardamom and saffron, sold from cafeterias and drive-through hatches across the Gulf states in small cups for very little money — a South Asian preparation carried by migrant labour and adopted so completely that it now reads as local.
• Kazakh tea hospitality — Black tea with milk or cream poured into a small handleless bowl and never filled to the top, served by one designated person from the head of a laden table, for as long as the guests are there.
• Nepali tea customs — Milk tea drunk many times a day in a small glass, black tea with ginger in the hills, salted butter tea in the high north, and an eastern tea industry that grows Darjeeling-style leaf and struggles to sell it under its own name.
• Once — the Chilean tea meal — Chile has a daily evening meal named after a number, taken with tea, bread, avocado, ham and cake, that in many households replaces dinner entirely — and an origin story about the eleven letters of a spirit that is repeated everywhere and evidenced nowhere.
• Pakistani tea customs — Tea boiled entirely in milk with no water at all, green cardamom qahwa in the north-west, and a country that drinks tea in enormous quantity while growing almost none of it.
• Suja and ngaja in Bhutan — Bhutan’s churned butter-and-salt tea and its sweet milk counterpart, served in wooden bowls, offered continuously, and present at every formal occasion in a country where the etiquette around it is explicit.
• Sweet tea in the American South — Black tea brewed strong, sweetened while still hot so the sugar dissolves properly, and poured over ice — a regional default with a geographic boundary, a fixed role at funerals and church suppers, and a very large amount of sugar.
• Teh tarik and mamak stall culture — Malaysian and Singaporean pulled tea, and the twenty-four-hour Indian Muslim stalls it belongs to — including the ordering code that lets a customer specify milk, sweetness and temperature in three syllables.
• The Burmese teashop — Sweet, strong, condensed-milk tea in a small cup, a pot of free weak green tea on the table beside it, food from three culinary traditions, and a room that has served as Myanmar's principal place for talking in public — and, for the same reason, for listening to people talk.
• The kulhar and railway chai — An unfired-clay cup thrown by hand, used once and broken, and the railway platform economy that is the largest single thing keeping it alive — plus the policy that has repeatedly tried to bring it back and the reasons it keeps losing to plastic.
• The Lhasa sweet tea house — Sweet milk tea sold by the thermos in noisy public halls, paid for by leaving coins on the table — an urban Tibetan institution with an unexpected foreign parentage, and an entirely different thing from the butter tea it sits beside.
• The tea auction system — The mechanism through which most of the world’s tea is still priced — invented in London, exported to the producing countries, and now run from Mombasa, Colombo, Kolkata and a handful of other floors that almost no tea drinker has heard of.
• The tea break — Industrial Britain’s tea break, the trolley and the tea lady who pushed it, the round that governs who makes it, and a workplace institution that was fought over, legislated around, and then quietly dismantled by the office kitchen.

Prepared drinks built on this tea

A drink is a recipe rather than a leaf: the tea above is one ingredient in it, and the method, the additions and the ratios belong to the drink rather than to this page.

• Chai latte — A café drink built from spiced concentrate or syrup topped with steamed milk. It is a distinct preparation from masala chai rather than a version of it: the spices are usually pre-extracted into a syrup, and the tea is often a minor component or absent entirely.
• Hong Kong milk tea — Strong black tea repeatedly strained through a fine cloth bag and served with evaporated milk. The bag stains tea-brown with use and gave the drink its Cantonese nickname; the repeated straining is what produces its characteristic smoothness.
• Southern sweet tea — Strong black tea sweetened heavily while still hot, then chilled and served over ice. A staple of the American South, where the sugar is dissolved into hot tea rather than stirred into cold — which is the technical difference between it and iced tea with sugar added.
• Teh tarik — Strong black tea with condensed milk, repeatedly poured between two vessels held far apart. The pulling aerates the drink, cools it to drinking temperature and raises a thick foam on top, and it is performed as a piece of skill in its own right.
• Thai iced tea — Heavily sweetened spiced black tea served over ice with condensed and evaporated milk poured on top. Its distinctive orange colour comes from added colouring in the commercial tea mix rather than from the tea itself, which is worth knowing because it is widely assumed otherwise.

Guides covering this tea

• How one machine changed the world tea trade
• Orthodox and CTC are two industries, not two qualities
• How the tea bag was invented, and what it changed
• From field to shelf: who handles tea on the way
• How a tea auction works
• Commodity tea and speciality tea are two different industries
• Where the price of a teabag goes
• The economics of teabags and loose leaf
• CTC grade codes: BP, PF, PD, Dust and what the letters mean here
• Buying for a purpose: iced tea, milk tea, cooking and lattes