Take a Yunhuang piece and turn it over. Before the foot ring, before the mark, before anything else, look at the edge.
It carries an irregular brown line, warmer than the rest of the piece. Sometimes it runs low along the wall; sometimes it stops early. Put two pieces side by side and the lines never quite match.
No one painted it. Our story begins with a detail you can see for yourself, before you know anything about the piece's history.
1 · The edge
At around 1,300°C, the glaze becomes mobile on the surface of the vessel. It moves towards the edge of a plate; along the way its thickness changes and iron oxides gather in places. The colour warms. What our product notes call the caramel edge is no painted decoration. Gravity drew it, and gravity never draws quite the same line twice.
That raises a question: why does this glaze move while the yellow ceramics in museum cases look so even?
Because Jingdezhen has more than one kind of yellow. At least two paths lead to it, with different materials and firing temperatures.
The first is the court yellow seen behind glass. It appeared under the Hongwu emperor and reached its height under Hongzhi in the late fifteenth century. Known as jiāo huáng, or poured yellow, its glaze was applied to a vessel already fired once. Iron oxide supplied the colour, lead oxide helped the glaze melt, and a second firing at 850–900°C produced a dense, even finish. It is a controlled yellow, and a lead glaze.
The second path is older and less celebrated: a lime glaze coloured by ferric iron, applied to an unfired body and taken in a single firing to 1,300–1,310°C. One firing, no lead. At that temperature, body and surface vitrify together. This family of yellow reaches back at least to the Tang period. Its material moves and settles in the kiln; no one dictates exactly where it will stop.
Yunhuang belongs to this second family. Our product specifications use the workshop's terms: high-fired ceramic with a reactive glaze. We do not pour a glaze at 850°C, and we do not use lead. This technical choice creates what you see: a finely speckled cream, a caramel edge, and pieces that cannot be made identical.
Court yellow belonged to a power meant to be read from afar. Ours belongs to a material that obeys only part of the plan.
2 · Why yellow
Why should one colour matter more than another? In China, yellow was never simply a colour. It was also a direction. In the cosmology of the Five Phases, yellow belongs to Earth, and Earth occupies the centre. Blue is associated with Heaven, red with the Sun, white with the Moon; yellow remains in the middle, where the ruler stands.
This idea took tangible form. At Beijing's round Altar of Heaven, blue vessels were used; at the square Altar of Earth, yellow; at the altars of the Sun and Moon, red and white. Yellow was chosen not only for its beauty, but for its link to the earth being addressed.
In 1447, the twelfth year of the Zhengtong reign, an edict banned private production in Raozhou prefecture, Jiangxi, of yellow, purple, red, green, blue and blue-and-white ceramics. Yellow came first in the list. The recorded punishment for a principal offender included execution by dismemberment, confiscation of property and military exile for the men of the family.
In that setting, making a yellow bowl privately could cost a life. What the ban guarded was more than a recipe. It guarded a sign of sovereignty. Allowing yellow to circulate freely meant allowing a symbol of power to circulate.
3 · Yellow crossed the sea
Another chapter of this story leads to France.
On 1 September 1712, the Jesuit François Xavier d'Entrecolles, a native of Lyon living in Jiangxi and familiar with Jingdezhen's kilns, wrote to a fellow Jesuit in France. He described the city and its fires, and set down something Europe was eager to understand: what porcelain was made from.
He named two materials, Petuntse and Gaoling, and noted that Jingdezhen itself did not produce all the raw materials used by its potters.
One was crushed porcelain stone, bái dūn zǐ; the other was a white clay formed by weathered granite, gāolǐng tǔ. He wrote Gaoling after a hill some fifty kilometres away. You know the word that followed: kaolin. A place name from the Jingdezhen region entered European vocabularies through a French letter.
His observations and samples fed European research. Réaumur examined the materials. A porcelain workshop opened at Vincennes in 1740 and moved to Sèvres in 1756. Jean Hellot contributed to research into colours, among them the daffodil yellow known as jaune jonquille. In 1768, the discovery of kaolin at Saint-Yrieix in the Limousin opened the way for French hard-paste porcelain at Sèvres.
During the same century, materials and techniques also travelled in the other direction. European enamels reached China along the maritime routes. Late in the Kangxi reign, imperial workshops found in them a substance that yielded a cleaner yellow than iron: antimony oxide. Under Yongzheng it became a pale, milky glaze. In 1735, the imperial kiln supervisor Tang Ying recorded it among the court's glazes under the revealing name xīyáng huáng: Western yellow.
Yellow travelled both ways. The piece in your hands was made in the city d'Entrecolles wrote about, from clay of that region, by makers creating for today's tables.
4 · The speckles
Return to the piece. This time, look into it in the morning light.
Small darker points interrupt the cream. In a photograph they can look like a printing flaw. In the hand, they keep the surface alive: at around 1,300°C, iron in the glaze does not spread as a perfectly even cloud. It gathers in places, like ground pepper in cream.
No machine places these points. No one can order their pattern. This is the part of the piece that belongs to it alone.
There is a practical consequence, and we would rather tell you first. Place two pieces side by side: their base tones may differ slightly, and the speckles will not fall in the same places. Other glazes can offer near-perfect uniformity. We chose this living yellow, in which each piece keeps something of its own.
5 · What the name does not claim
Yunhuang is a name we made. It does not appear in an old treatise; no historical vessel bears it, and no master of Jingdezhen gave it to us. Read yún as cloud and huáng as yellow: the yellow of clouds, like a band of evening light crossing a ridge and never settling twice in quite the same place.
We do not claim to recreate an imperial glaze. We hold no Ming recipe, no imperial-kiln inheritance and no ancient certificate of authenticity. This history is real; a few concrete facts connect Yunhuang to it, and we prefer to name them clearly:
- Its clay comes from the same geological region as the gāolǐng tǔ whose name entered European languages in 1712.
- The piece is formed and fired in Jingdezhen.
- Its iron-coloured glaze belongs to the high-temperature family, rather than the court-yellow one.
- Everything else is a contemporary choice, made in 2026 for French tables.
We do not ask history to make a colour sacred. We ask it to explain what you see when you turn the plate over.
Explore the Yunhuang collection →
Cover image: yellow-glazed roof tiles at Beijing’s Forbidden City, an illustrative reference to imperial yellow. Framing adapted from a photo by Andreas Gusicov / Pexels under the Pexels License. Not a Jingdezhen kiln or a Yunhuang product.