Korean Celadon Teaware

The blue-green glaze of Goryeo Dynasty celadon (cheongja) was a technological achievement that astonished even Chinese visitors and remains visually distinctive 900 years later — a warmer, slightly warmer blue-green differing from the cooler, more uniform Chinese longquan celadon. The most advanced Goryeo celadon used the sanggam inlay technique: carving designs into the clay body, filling with white or dark slip, smoothing, and firing — producing delicate cranes, clouds, chrysanthemums, willows, and geometric patterns revealed through a transparent glaze. These bowls, ewers, incense burners, and tea vessels were made for the Goryeo court and aristocracy; their aesthetic refinement became the most internationally recognized achievement of Korean visual culture.

In-Depth Explanation

Historical Background

Celadon technology:

Celadon is any ceramic fired at high temperature (approximately 1,200–1,300°C) with an iron-oxide glaze that reduces under oxygen-limited kiln conditions to produce a grey-green or blue-green color (the iron reduces from Fe₂O₃ to FeO in reduction firing, shifting the color from ochre/brown to blue-green). Celadon technology originated in China in the Han Dynasty and reached its most celebrated forms in the Song Dynasty Longquan kilns (Zhejiang Province) and Ru ware.

Korea adopted and transformed celadon:

Korean potters in the late Unified Silla and early Goryeo period (8th–10th centuries) learned celadon technology from Chinese migrants and trade; by the 10th–12th centuries, Korean kilns had developed a distinctive celadon aesthetic that Chinese court visitors described as uniquely beautiful. The Chinese scholar Xu Jing, visiting Korea in 1124, wrote in his Gaoli tujing (“Illustrated Account of Goryeo”) about the Korean celadon glaze — specifically describing its “kingfisher blue” (bi se, 翡色) as distinctively beautiful and different from Chinese equivalents.

Goryeo’s peak (12th century):

The 11th–12th century Goryeo Dynasty is the peak period of Korean celadon both technically and artistically:

Development and mastery of the sanggam (상감, 象嵌) inlay technique
Full-figure sculptural celadon pieces (ewers in the form of lotus-seated Bodhisattvas, lidded containers in the shape of lions or turtles)
Technical mastery of kiln reduction to achieve the “kingfisher blue” glaze
Integration with Buddhist temple culture (many surviving pieces were temple or aristocratic mortuary goods)

The Mongol disruption:

The Mongol invasion of Korea in 1231 and repeated military campaigns through the 1270s devastated the Goryeo ceramic industry; key kiln sites were damaged; the quality of celadon production declined in the later Goryeo period. By the transition to the Joseon Dynasty (1392), celadon gradually transitioned into buncheong ware (a related but simpler stoneware style).

The Sanggam Inlay Technique

Sanggam is the defining technical innovation of Goryeo celadon and the technique that most distinguishes it from Chinese celadon of the same period:

Process:

The clay body is formed (wheel-thrown or hand-built), partially dried to leather-hard stage
Designs are incised (carved) into the clay surface with a sharp tool; the incisions may be fine line drawings (geometric patterns, cloud scrolls) or broader carved-out areas (for backgrounds)
White slip (white clay slurry) is pressed into the incised areas; separately, dark (iron-rich) slip is pressed into areas designated for dark elements
The surface is scraped flat when the slip has dried slightly, leaving the inlaid design flush with the clay body surface
The piece is bisque-fired, then glazed with celadon glaze, then fired at high temperature in reduction atmosphere
The final fired piece reveals the inlaid design in white or dark grey visible through the transparent celadon glaze

Typical motifs:

Cranes flying among clouds (the most iconic Goryeo celadon motif)
Willow trees at waterside
Chrysanthemums and lotus flowers
Geometric geometric diaper patterns (repeated small geometric units filling backgrounds)
Deer, rabbits, stylized landscape elements
Buddhist imagery (lotus petals, dharma wheels)

Why the sanggam technique is significant:

No other East Asian ceramic tradition at the time developed a comparable inlaying technique; Chinese Song celadon was primarily valued for its pure monochrome glaze without inlay; Goryeo’s sanggam introduced pictorial complexity within the celadon glaze tradition — a technical innovation specific to Korea.

Goryeo Celadon Teaware Specifically

Goryeo celadon teaware was produced for aristocratic and Buddhist temple contexts, not everyday household use. Key forms:

Tea bowls (다완, dawán):

Wide-mouthed bowls used for whisked tea (the Song Dynasty Chinese “whipped tea” method that Korean Buddhist monasteries and Goryeo aristocracy adopted); similar function to Chinese Song Dynasty Jian ware tenmoku bowls; the blue-green glaze against white tea foam created a distinctly different aesthetic from tenmoku’s black-on-white contrast — celadon created a subtler, more understated blue-green-and-white visual composition.

Tea ewers (합, hap, and various pitcher forms):

Pouring vessels for hot water used in the tea preparation ceremony; some of the most elaborate sculptural celadon pieces are ewers — including the famous Goryeo lotus-bud ewer forms with the spout emerging from a lotus flower and the lid formed as a lotus bud.

Maebyeong (매병, “plum vase”):

A distinctive Goryeo celadon vessel form — broad-shouldered, narrow-necked vase with a short almost hidden neck; used for plum blossom branches or wine; some of the most celebrated Goryeo celadon pieces are maebyeong with sanggam inlaid designs; not strictly teaware but central to Goryeo celadon’s visual identity.

Joseon White Porcelain and Buncheong

When the Goryeo Dynasty gave way to the Joseon Dynasty (1392–1897), Joseon’s Confucian court aesthetic shifted away from Goryeo’s Buddhist-flavored, elaborate decorative celadon toward simpler, purer forms:

White porcelain (baekja, 백자):

Joseon’s iconic ceramic form — pure white, undecorated or with minimal cobalt-blue underglaze painting; embodying Confucian restraint, austerity, and cleanliness; used for court rituals, scholar’s desk accessories, and official ceremony

Buncheong (분청사기):

An intermediate style between late Goryeo celadon and pure Joseon white; grey-green to blue-grey ware with white slip decoration in stamped, brushed, or inlaid patterns; less refined than Goryeo sanggam but vigorous, freely designed, sometimes whimsical; produced approximately 15th–16th centuries before declining

Impact on Japanese aesthetics:

Japanese potters and the Japanese tea culture establishment during the Muromachi and early Edo periods found Joseon white porcelain and particularly buncheong bowls extraordinarily beautiful. Joseon buncheong bowls and simple baekja rice bowls (originally Korean peasant household ware) were imported in enormous quantities, treasured, given prestigious Japanese names (ido-chawan, komogai, gohon-de), and became some of the most celebrated tea ceremony bowls in Japan — precisely because their “imperfection” and handmade vigor fit the wabi-cha aesthetic developed by Sen Rikyu. The Japanese aesthetic appreciation for humble Korean Joseon ware was a crucial vector through which Korean ceramics shaped Japanese tea culture.

Contemporary Korean Tea and Celadon

Contemporary celadon production:

The Goryeo celadon tradition was revived in the 20th century, particularly in Gangjin and Gochang Counties in South Jeolla Province (the original Goryeo kiln sites). Contemporary Korean celadon potters produce both reproduction-style pieces (closely following Goryeo designs) and contemporary artistic work; the Gangjin Cheongja Cultural Center documents the tradition and supports contemporary artisans.

Korean tea ceremony (다례, darye):

A formal Korean tea ceremony tradition was documented and revived particularly through the 20th-century work of tea scholars including Choe Beom-sul and later through the Joseon-era records. Contemporary Korean tea ceremony (darye) uses porcelain or celadon teaware — tea bowl, water ewer, tea scoop, small trays — in a ritual that differs from the Japanese chanoyu while sharing the meditative, aesthetic-attention focus.

Common Misconceptions

“Korean celadon is imitation Chinese celadon.” While the technology was learned from China, Goryeo celadon developed the sanggam inlay technique that China’s Song Dynasty celadon did not use; the glaze color and warmth differ aesthetically; the cultural iconography (cranes, Korean landscape motifs) is distinctly Korean; Goryeo celadon is an original tradition that descended from but transformed Chinese originals.

“Celadon must be blue.” Celadon ranges from blue-grey to jade-green to olive-green depending on the iron content of the glaze and the degree of reduction in the kiln; Goryeo celadon’s distinctive “kingfisher blue” (青, cheong) is a specific variant; Chinese Longquan celadon varies from grey-green to deep jade; not all celadon is blue.

“Japanese ido-chawan (tea bowls) were made by Japanese potters.” The famous Ido tea bowls treasured in Japanese tea ceremony collections — including the National Treasure-class Kizaemon Ido and Kohiki bowls — were Korean-made rice bowls (Joseon period household ware) imported to Japan and elevated to tea ceremony status by Japanese connoisseurs; they were not made by Japanese potters to Japanese aesthetic specifications.

Related Terms

Research

Valenstein, S. G. (2000). Handbook of Chinese Ceramics (Rev. ed.). The Metropolitan Museum of Art. While focused on Chinese ceramics, this reference contains essential comparative context for Goryeo celadon, documenting the Chinese celadon traditions (Longquan, Ru ware) that Korean potters first learned from and subsequently diverged from; the Longquan chapter’s technical discussion of reduction-fired iron glaze chemistry provides the mechanism underlying the color difference between Chinese and Goryeo celadon (Korean clay and glaze materials produced slightly warmer iron ratios, contributing to the characteristic “kingfisher blue” tones); used in this entry for the technical comparison of Chinese and Korean celadon glazing.
Chung, Y. Y. (2015). Goryeo Celadon. National Museum of Korea. Catalog from the Museum’s Goryeo celadon permanent collection; the most authoritative English-language descriptive catalog of Goryeo celadon including technical analysis of kiln sites (Gangjin and Gochang), chemical and mineralogical analysis of glaze composition across the 10th–14th century production period, detailed documentation of the sanggam inlay technique with cross-section microscopy of inlaid slip layers, and historical sourcing from Xu Jing’s 1124 account (Gaoli tujing) for the Chinese visitor observation about “kingfisher blue”; primary source for the historical, technical, and aesthetic information in this entry.

Mikey Does