Celadon, buncheong, white porcelain: how to read a ceramic surface
Separate the clay body, white slip and glaze, then look for inlaid, incised, stamped or painted decoration in a Korean ceramic vessel.
Celadon, buncheong, white porcelain: how to read a ceramic surface
Instead of deciding ‘green means celadon, white means porcelain’, ask what forms the vessel and what was added to its surface. A white clay body and a coating of white slip are not the same thing.[1]
Separate body, slip and glaze
The clay body gives a vessel its shape. Buncheong typically has a grayish body decorated with white slip—a liquid clay coating—then glazed and fired. Slip is not glaze: glaze forms a glassy surface during firing. White porcelain has a white clay body beneath its glaze, rather than relying on white slip over a darker body.[1][6][13]
Look near the mouth and foot for exposed clay or a coating’s edge. Do not mistake a bright reflection for white slip. If the base is hidden, use the label’s material and technique rather than guessing from color alone.
Celadon: follow the lines
Celadon’s greenish glaze is a starting point, not its entire identity. Korean celadon also uses incision, relief, openwork and painted decoration, as well as inlay.[3]
Celadon vessel with lotus, plum and bamboo designs, 1300s, Cleveland Museum of Art.
This is the museum’s *Vase with Inlaid Lotus, Plum, and Bamboo Design*. Sanggam, or inlay, fills engraved designs with white or black clay. Follow the lotus outlines and contrasting lines, then connect what you see with ‘inlaid’ on the label. Lines alone do not prove a technique. This photograph shows a Cleveland collection object, not a National Museum of Korea object.[5]
Buncheong: what happened to the white coating?
Johwa incises lines into the slip; bakji, or sgraffito, removes broader areas around a design. The peony flask in the cover photograph is a bakji example. Brush marks, cut lines and scraped fields are different clues.[4][6][14]
Fish incised into white slip on a buncheong bottle, 1400s–1500s, Cleveland Museum of Art.
Follow this fish’s outline and fins. The museum identifies carved decoration on white slip: dark lines are not automatically iron painting. Inhwa, stamping, uses impressed patterns filled with white slip. Another example is the National Museum of Korea’s buncheong bowl bearing the office name ‘Jangheunggo’ and chrysanthemum patterns—not the fish bottle pictured here.[6][8][12]
Cheolhwa is painting with iron pigment. The national museum’s buncheong cylindrical vessel with painted peonies has dark decoration over white slip. A dark line could therefore be inlay, exposed body or pigment; read the technique before choosing.[9]
White porcelain need not be undecorated
Iron-painted dragon and clouds on a white porcelain jar, late 1600s, Cleveland Museum of Art.
The pictured *Jar with Dragon and Clouds Design* is porcelain with underglaze iron decoration. Follow the changing thickness of the dragon’s painted scales. Here the body is white porcelain and the decoration is iron painting. Cheolhwa can appear on both buncheong and porcelain; it is not a fourth clay category.[1][7][9]
Turn a label into a description
Read the vessel type, technique, motif, form and date separately. The jar’s Korean name, ‘철화 백자 운룡무늬 호’, identifies iron painting, white porcelain, dragon-and-cloud motifs and a jar form. Look for documented use too: Korean ceramics served everyday and ritual purposes, so shape alone does not establish an exact function.[2][7]
Goryeo celadon and Joseon buncheong and porcelain describe major historical trends, not three exclusive stages. Buncheong and white porcelain overlapped in early Joseon; changes in a tradition are not the simultaneous disappearance of every ceramic practice.[1][2]
Try describing one object as ‘a white-bodied porcelain jar painted with a dragon in iron pigment’, rather than simply ‘a white pot’. That small change directs your attention to how it was made.
Official information
[1] National Museum of Korea: buncheong and porcelain
[2] Jeonju National Museum: arts and crafts
[3] National Museum of Korea: celadon
[5] Cleveland: inlaid celadon vessel
[7] Cleveland: iron-painted porcelain jar
[8] National Museum of Korea: Jangheunggo bowl
[9] National Museum of Korea: iron-painted peony vessel
[12] Cleveland: stamped and slip-inlaid decoration
[13] V&A: ceramic terms
[14] The Met: buncheong techniques
Photo credits
• Cover: Cleveland Museum of Art, 1921.649, CC0 1.0; original JPEGs; no crop or retouch.
• Celadon: Cleveland Museum of Art, 1918.471, CC0 1.0; original JPEGs; no crop or retouch.
• Buncheong: Cleveland Museum of Art, 1962.153, CC0 1.0; original JPEGs; no crop or retouch.
• White porcelain: Cleveland Museum of Art, 1986.69, CC0 1.0; original JPEGs; no crop or retouch.