Blue-and-white porcelain is the pattern the whole world recognises, which is exactly why it is easy to stop looking at it. Get close to a piece and the blue is not one colour at all. It pools where the brush pressed, thins where it lifted, and softens into the white the way ink softens into paper. This is a short guide to where that cobalt blue comes from, how it is painted in Jingdezhen, and what to look for when you hold a piece in your hand.
A short history of blue under glaze
Painting cobalt blue beneath a clear glaze was perfected in Jingdezhen in the fourteenth century, during the Yuan dynasty. The combination of the city's fine white porcelain body and a cobalt pigment that could survive a high-temperature firing produced something new: a crisp, permanent blue line sealed under glass-like glaze.
In the early Ming dynasty, particularly the Yongle and Xuande reigns of the fifteenth century, Jingdezhen's painters worked with an imported cobalt known in Chinese sources as Sumali blue. It was prized for its deep, saturated tone and for the way it gathered into darker, almost black specks where the pigment lay thickest. Those "heaped" spots, once a by-product of an unpredictable mineral, became one of the most admired qualities of the period. The lotus on The Star-Ridged Lotus Cup draws directly on Xuande-period painting — sharper, more layered and less symmetrical than later interpretations.
From Jingdezhen, blue-and-white travelled along trade routes to the Middle East and Europe, where it was copied for centuries. Delft tiles, English willow pattern and countless factory patterns all trace back to this one city's cobalt.
A pigment that moves
Our makers work in a cobalt inspired by Sumali blue, developed through years of experimentation with natural cobalt minerals. Under fire it shows remarkable variation — from deep, concentrated tones and metallic specks to softly diffused edges reminiscent of ink spreading across paper.
The pigment is laid onto the unfired body, sealed under glaze, and only becomes the colour you see in the kiln. Before firing, cobalt looks dull and greyish; the blue is a product of heat and kiln atmosphere. That is why the firing matters so much — our makers drive a gas kiln on a slower, wood-kiln temperature curve with deliberate shifts between oxidation and reduction, and the fire influences the depth of the cobalt as much as the brush does. We explain the firing in Where Fire Remembers.
Until the firing is done, no one knows precisely what the blue will do.
Painted, not printed
That is the difference a transfer print cannot fake. A printed motif is identical on every piece by definition; a painted one carries the speed of the hand that made it. Two cups from the same studio, the same pigment and the same kiln will not match exactly — and that is the point, not a defect.
Hand-painting blue-and-white is also slower than it looks. Outlines are drawn first, and larger areas are then filled with washes of diluted cobalt in several tones, so that one colour produces a whole range of depth. On The Three Kingdoms Narrative Plate, layers of deep and pale cobalt create distance and movement in what is technically a single-colour painting.
How to read the blue on a piece
It is worth holding a piece to the light and following one line to its end. A few things to look for:
- Pooling. Where the brush paused or pressed, the cobalt sits darker. Where it lifted, it fades.
- Diffusion. The edges of a painted line soften slightly into the glaze during firing, like ink on damp paper. A printed line stays hard-edged.
- Specks. Small darker or metallic points where the cobalt concentrated — the quality early Ming porcelain became famous for.
- The reload. Somewhere along a long line you will find the moment the brush was dipped again: a small change in density, then the stroke continues.
None of these marks are flaws. They are the evidence of a hand and a fire, and they are why no two pieces are the same. We go into this further in Variation Is Not a Fault.
Blue-and-white for contemporary life
Blue-and-white was always a working pattern — made for tables, not only cabinets. The pieces we carry keep that spirit:
- The Blue & White Story Wine Cooler — figures unfold among clouds and landscapes as the vessel is turned, with sculpted lion handles on either side.
- The Beauty & Bones Bowl — painted women on the outside, each mirrored by a skeleton on the inside wall.
- The Sea Pomegranate Shot Cup — a 15ml stem cup with a curling cobalt scroll, for baijiu, sake or a first sip.
- The Celestial Mandarin Fish Jewellery Dish — a cobalt celestial bloom above fish moving through a mould-impressed wave.
More hand-painted narrative work is gathered in Heritage Reimagined.
Questions about blue-and-white porcelain
Is the blue on JingTale porcelain hand-painted?
Yes. The motifs are painted by hand in cobalt onto the unfired porcelain, then sealed under glaze and fired. They are not transfers or prints.
Why don't two pieces with the same pattern match exactly?
Because each is painted by hand and the cobalt responds to the fire differently every time. Depth of blue, line weight and small specks will vary from piece to piece.
Will the blue wear off with use?
Underglaze cobalt sits beneath the glaze, so it is protected from everyday use and washing. Gold and overglaze details are more delicate — see Wash It by Hand.
What is Sumali blue?
A cobalt pigment used by Jingdezhen painters in the early Ming dynasty, admired for its deep tone and dark specks. Our makers work with a cobalt inspired by it, developed from natural cobalt minerals.