The test is the reverse

Turn a tanchoi over. That is the whole examination. A true tanchoi is woven on a warp-faced satin ground — five or seven ends of silk passing over before the bind — with two to five colours of extra weft carrying the pattern, every float worked back into the cloth. Nothing hangs loose; nothing is clipped. Set it beside kadhua, where each motif is woven separately by hand, and cutwork, where the floats run across the back and are sheared — tanchoi is the third answer to the same question: what do you do with the thread between the motifs? Its answer — bind it in — gives a cloth with two finished faces, soft as a conversation, and classically with little or no zari at all. That restraint is the point. Tanchoi is the Banarasi that whispers.

Three weavers go to Shanghai

The story the trade tells — and a Mumbai museum's own object record tells with it — begins around 1856, when the Parsi merchant Sir Jamsetjee Jejeebhoy sent three weavers of a Surat family to study under a master weaver in China. They returned with the satin technique in their hands and, the telling goes, took their teacher's name — Chhoi — so that the cloth of the three Chhois became tan-choi. The versions disagree charmingly: one research project spells the family two ways and reads the name as "three-China" instead; no two accounts dress the master in the same city. We pass the legend on as legend — but it has an attested core, and a better ending: the earliest sample pieces survive with the family's seal woven into them, and after Independence, Gandhi himself — who had visited the family — encouraged the founding of tanchoi centres that still exist. Few weaves anywhere can produce their own birth certificate within a decade of the event.

Surat lets go, Banaras catches

The twentieth century was unkind to the weave's first home. European fashion displaced the China taste, powerlooms arrived, and the Parsi wardrobe itself drifted to georgette; a descendant of the original family attempted a revival factory in Surat and found no customers. Tanchoi held on in Bombay into the 1940s and 50s — and then Banaras did what Banaras does with orphaned techniques: it absorbed the weave, wove it better value, and gave it a second vocabulary. The city added what Surat had withheld — zari — and named its variants like children: satin tanchoi, satin jari tanchoi, the atlas or gilt with its heavier shine, the mushabbar whose net of branches covers the field. The paisleys of the Kashmiri jamawar settled into its pallus. By the time a tanchoi stole was chosen as a state gift for Queen Elizabeth II in 2015, the weave had been wholly Banarasi for two generations.

On the loom today

In Banaras today tanchoi is woven on jacquard pit looms, a saree asking roughly five hundred to eight hundred grams of silk and some two to three months of work. It is one of the six design categories named in the Geographical Indication for Banaras Brocades and Sarees, registered in 2009 — which means the law itself now lists as Banarasi a weave born in China and raised in Surat. We think that is not a contradiction but the city's whole biography in one entry: Banaras has never minded where a good idea was born. It minds whether the back of the cloth is clean.

Plain answers

What is a tanchoi saree?

A Banarasi woven on a satin silk ground with extra silk wefts bound into the cloth — patterned on the face, clean on the reverse, classically with little or no zari.

How do I identify a real tanchoi?

Turn it over: the back should be closely woven and smooth, with no long clipped threads. A rough, floaty or sheared reverse is another technique — or a powerloom imitation.

Where did tanchoi come from?

By the trade's telling, three Surat weavers sent to China around 1856 by the Parsi merchant Sir Jamsetjee Jejeebhoy brought the technique home; Banaras absorbed it by the mid-twentieth century.

What does "tanchoi" mean?

Most tellings read it as tan (three) plus Chhoi, the Chinese master's name the three weavers adopted; a variant reads Choi as "China" itself.

Does a tanchoi have zari?

Classically little or none — the pattern is silk on silk. Banaras later added zari-rich variants such as the atlas (gilt) and satin jari tanchoi.

Is tanchoi good for long evenings and sangeets?

Yes — with little metal in the weft it is lighter and suppler than a brocaded katan, which is why our wedding-guest essay sends dancers to it.