Long before blue and white porcelain captured the world’s attention, Jingdezhen artisans were mastering the art of celadon glaze—a soft, ethereal green hue that evokes the tranquility of nature and the subtlety of Chinese aesthetics. Known as “qingci” in Chinese, celadon glaze has been a staple of Jingdezhen’s ceramic tradition for over a millennium, prized for its smooth texture, delicate color variations, and the way it complements both simple and intricate porcelain forms. Unlike bold, vibrant glazes, celadon’s beauty lies in its understated elegance, a quality that has made it a favorite among connoisseurs and collectors for centuries.
The history of celadon glaze in Jingdezhen dates back to the Five Dynasties period (907–979 AD), though its roots can be traced to even earlier ceramic traditions in southern China. Early celadon glazes were relatively simple, with a pale, yellowish-green hue, but by the Song Dynasty (960–1279 AD)—a golden age for Chinese ceramics—Jingdezhen artisans had refined the formula, creating a richer, more uniform green that became known as “imperial celadon.” This period saw a focus on simplicity and harmony, and celadon glaze, with its muted tone, perfectly complemented the clean, elegant shapes of Song Dynasty porcelain, such as bowls, vases, and tea sets.
The secret to celadon’s unique color lies in its chemical composition and the firing process. Celadon glaze is typically made from a base of quartz, feldspar, and lime, with a small amount of iron oxide added as the colorant. The amount of iron oxide determines the final hue: less iron produces a pale, celadon-green, while more iron results in a deeper, olive-green or even brownish-green. The firing process is equally crucial; celadon requires a reduction firing, where the kiln atmosphere is low in oxygen. This causes the iron oxide to undergo a chemical reaction, transforming from ferric oxide (which produces a reddish color) to ferrous oxide (which produces the characteristic green).
Jingdezhen artisans spent centuries mastering the art of celadon firing, as even the smallest variation in temperature or kiln atmosphere could alter the glaze’s color dramatically. A temperature that is too high can cause the glaze to melt excessively, resulting in a dull, runny surface, while a temperature that is too low leaves the glaze underfired, with a rough texture and uneven color. The reduction process also requires careful control; too little reduction results in a yellowish hue, while too much can cause black spots or streaks in the glaze.
