Published March 10, 2026
Porcelain marks are the single most important tool for dating and authenticating Chinese ceramics — yet they are also the most frequently misread. This guide walks you through imperial reign marks, kiln marks, and artisan signatures so you can distinguish a Ming masterpiece from a skilled twentieth-century reproduction.
Turn a piece of Chinese porcelain upside down and you will often find, painted or incised on the base, a small arrangement of characters. This is the porcelain mark — and for collectors, it is the first and most important clue to a piece's origin, age, and authenticity. Learning to read these marks is not optional for anyone serious about collecting Chinese ceramics; it is foundational.
But a word of caution before we begin: marks can be — and frequently are — copied, faked, or applied retrospectively. A Kangxi reign mark on the base of a vase does not mean the vase was made during the Kangxi period. It may mean that it was made in admiration of Kangxi-era style, or it may mean that someone hoped you would not know the difference. The mark is a starting point for authentication, never the conclusion.
Reign Marks (Nianhao)
The most common and most important marks on Chinese porcelain are reign marks — characters identifying the emperor during whose reign the piece was supposedly made. A standard reign mark consists of six characters arranged in three rows of two, read from top to bottom and right to left. The first two characters identify the dynasty (e.g., Da Ming — “Great Ming”), the middle two give the emperor's reign title (e.g., Chenghua), and the final two characters are “nian zhi” — meaning “period made.”
Four-character marks also exist, omitting the dynasty name and giving only the reign title plus “nian zhi.” These are particularly common on later Qing Dynasty wares.
The most prestigious and widely collected reign marks include: Xuande (1426–1435) and Chenghua (1465–1487) from the Ming Dynasty; Kangxi (1662–1722), Yongzheng (1723–1735), and Qianlong (1736–1795) from the Qing Dynasty. Pieces genuinely from these periods command the highest prices at auction.
Hall Marks, Studio Marks, and Commendation Marks
Not all marks are reign marks. Hall marks (tangming) identify a specific studio, workshop, or patron's hall rather than an emperor. These are often found on pieces made for scholar-officials or wealthy merchants. Studio marks might read something like “Made for the Hall of Jade Purity” — a poetic name chosen by the owner.
Commendation marks are auspicious phrases: “Beautiful vessel for the rich and noble,” “Jade,” or simply “Fu” (fortune). These appear on pieces intended as gifts or ceremonial objects. Artisan marks, identifying the individual potter, are rarer on Chinese porcelain than on Western ceramics but become more common from the Republic period onward.
How to Authenticate
Reading a mark is only the first step. Authenticating a piece requires cross-referencing the mark with the body, the glaze, the style of decoration, and the form of the vessel. A genuine Kangxi blue-and-white piece will have a particular shade of cobalt (bright, almost sapphire), a specific glaze texture (slightly orange-peel on the surface), and a body that rings clearly when struck. If the mark says Kangxi but the glaze says nineteenth century, trust the glaze.
For beginning collectors, the most practical advice is this: learn three or four reign marks well enough to recognise them instantly. Study authenticated examples in museum collections. Handle as many genuine pieces as possible — weight, texture, and the sound of a fingernail tapped against glaze teach more than any book. And remember that in Chinese porcelain, the absence of a mark is not a deficiency. Some of the finest imperial wares were left deliberately unmarked.
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