Dehua Daily-Use Porcelain: Production Process and Craftsmanship
Dehua is a major hub of Chinese ceramic exports and was awarded the world's first "World Ceramic Capital" by the World Crafts Council in 2015. Among the dazzling range of Dehua wares, **daily-use porcelain** — tableware, tea ware, coffee ware, mugs, liquor sets and tea canisters — is the category closest to everyday life. It rests on the thousand-year foundation of "China White" craftsmanship (the Dehua porcelain firing technique is a national intangible cultural heritage, with a complete process comprising dozens of major steps and up to seventy-two detailed ones), while also being deeply integrated with automated production lines and standardized quality control, with large volumes exported to Europe, the Americas, Japan and South Korea.
A piece of daily-use porcelain is born along the main route of "raw material preparation → forming → drying and trimming → bisque firing → glazing → glaze firing → decoration and decorating firing → inspection and packaging."
I. Raw Material Preparation: Fine Clay Is the Root
Dehua's local kaolin is extremely low in iron and rich in potassium, making it ideal for high-whiteness porcelain. The body material for daily-use porcelain is prepared in two ways:
The plastic method: produces "clay pugs" with suitable moisture content for roller forming, suited to round, open vessels such as cups, bowls, plates and dishes;
The slip-casting method**: produces a flowable clay slurry for slip casting, suited to vessels with small mouths, large bellies and deep interiors.
Whichever route is taken, the clay must go through crushing, sieving, washing, iron removal, filter-pressing, preliminary kneading and aging to remove impurities and increase plasticity, then be de-aired in a vacuum pug mill, until it meets the standard of "fine, even and seamless."
II. Forming: Roller Forming and Slip Casting as the Two Pillars
Daily-use porcelain demands "large batches and high consistency," so forming is the key to both efficiency and uniformity:
Roller forming: the flat tool is replaced by a cone- or cylinder-shaped rotary roller head. The roller head and the mold each rotate about their own axes in the same direction, and the head presses the clay into shape; it is divided into hump (positive) molding, where the roller defines the exterior, and hollow (negative) molding, where the mold defines the exterior. Fast and regular in shape, it is the workhorse for round daily-use porcelain such as cups, bowls, plates and dishes — industry research puts it at roughly 60% of mid-stream forming processes;
-Slip casting: slurry is poured into a plaster mold, the plaster absorbs water and a body forms against the mold wall; the excess slip is poured out and the body is demolded. It suits complex shapes such as teapots, handled cups, irregular cups and tea canisters;
High-pressure casting and isostatic pressing**: next-generation high-precision forming processes yielding denser bodies with less deformation;
Hand throwing on the wheel**: mostly for premium custom tea ware, one piece at a time.
III. Drying and Trimming: Details Define Quality
Bodies are first air-dried naturally, then dried under controlled temperature in drying rooms; uneven moisture causes warping and cracking. After drying comes trimming: finishing the rim, scraping mold seams, cutting edges, cutting the foot ring and wiping with water; handled cups also have their handles joined on (for example, mutton-fat-jade cup handles are formed integrally with the cup body by slip casting and roller equipment to reduce seam cracking). Whether the bowl rim is round, the foot sits level and the lid fits snugly is all settled in these seemingly insignificant finishing steps.
IV. Bisque Firing (Optional)
Much daily-use porcelain is first bisque-fired at low temperature — commonly about 780°C for around eight hours — to burn off organic matter and strengthen the body, so that glazing is more even and underglaze painting does not bleed. Some products instead follow a single-firing route, glazing the green body directly.
V. Glazing: Inside and Outside Differ
Daily-use porcelain glazing pays attention to the difference between interior and exterior. First a line is drawn to separate the interior and exterior glaze, then the inside is usually glazed by "swilling" (pouring slip inside and draining it out), while the outside takes dipping, pouring or spraying. Traditionally Dehua white porcelain used a plant-ash glaze; modern daily-use porcelain mostly uses hard transparent glazes or white glazes, with the glaze slip likewise ball-milled, sieved, iron-removed and aged. Export tableware must also meet food-grade standards — lead-free and cadmium-free.
VI. Glaze Firing: A Thousand Degrees Decide the Quality
The glazed bodies enter the kiln and are fired along a complete heating—soaking—cooling curve. Daily-use porcelain is glaze-fired mostly between 1250 and 1330°C; Dehua tea ware commonly runs at about 1310°C for around twelve hours, and white porcelain often exceeds 1330°C. Temperature control emphasizes slowness and evenness — high-whiteness porcelain, for instance, is heated in staged ramps of about 70°C per hour, held, and then cooled before unloading. Once out of the kiln, glaze and body are fused into one, warm and jade-like — this is the finished "white porcelain."
VII. Decoration: Underglaze and Overglaze
Daily-use porcelain decoration falls into two systems:
**Underglaze decoration**: painted or printed by hand on the green or bisque body, then covered with a transparent glaze and fired in a single high-temperature firing at 1200–1300°C. The pattern is fully enclosed beneath the glaze layer — it never wears off, never fades, and is safe for dishwashers. This is the most mainstream decorative route for daily-use porcelain; Dehua's colored porcelain is dominated by underglaze blue-and-white;
-Overglaze decoration and decals: applied onto the glaze surface of the fired ware — decals, hand-painted wucai and famille-rose, gold tracing and gilding — then fired again in a decorating (muffle) kiln at about 750–900°C (commonly 800°C for over eight hours) to fix the colors. Overglaze decoration is vivid and rich in detail, but relatively delicate and should not be scrubbed with steel wool.
VIII. Assembly and Quality Inspection
Lidded vessels (tea canisters, lidded bowls) have their lids fitted and repeatedly test-seated, and cup handles and teapot spouts are individually checked for firmness. The white ware is first selected after unloading, and the decorated ware is selected again after the decorating firing: pieces are checked for warping, cracking, pinholes, glaze bubbles, kiln debris and color deviation, with dimensions and weights spot-checked; export products additionally undergo dishwasher and microwave suitability tests.
IX. Set Assembly and Packaging
Dinner sets and tea sets are assembled piece by piece, individually separated to prevent chipping, labeled, boxed and shipped.
Dehua daily-use porcelain is a typical marriage of "traditional craftsmanship × modern industry": the seventy-two intangible-heritage processes coexist with automated roller-forming and slip-casting lines, delivering both the warm jade-like "China White" and durable, wash-resistant underglaze decoration. It carries the thousand-year kiln fire onto dining tables and tea tables in countless homes — beauty in daily use is the most enduring form of ceramics.
