A reign mark is the first checkpoint in porcelain authentication, and it is also where forgers most often begin. This guide sets out the basic structure of imperial kiln marks, the calligraphic features of each reign, and the traps collectors encounter most often.

Standard Six-Character Format

The most common marks on Ming and Qing imperial wares are six-character marks in regular script or seal script, usually in the formula:

Great Ming / Great Qing + reign title + made during the reign

For example, "Da Qing Qianlong Nian Zhi" is normally written vertically from right to left in two columns of three characters each. Some pieces carry four-character marks that omit "Great Qing" or "Great Ming" and retain only the reign title and "nian zhi."

Quick Reference by Reign

Ming Dynasty

Yongle (1403-1424)

  • Usually a four-character seal-script mark, "Yongle nian zhi," with an open, spacious layout
  • Rounded, full characters with even spacing between strokes
  • Some white-glazed wares are unmarked and must be judged primarily by form

Xuande (1425-1435)

  • Six-character regular-script marks with powerful brushwork, traditionally regarded as the finest of all Ming reign marks
  • In the character "de," the right-hand "heart" component lacks the horizontal stroke often seen in later copies
  • Marks appear in varied positions: the foot, rim, and shoulder are all known

Chenghua (1465-1487)

  • Six-character regular-script marks, elegant and restrained, with fine, slender strokes
  • The hook stroke in "cheng" is comparatively short, one of the useful diagnostic details
  • Among the most frequently copied reign marks, so the body, glaze, and overall workmanship must be assessed together

Qing Dynasty

Kangxi (1662-1722)

  • Early pieces are often unmarked or bear cyclical-date marks; six-character regular-script marks become common from the middle and late reign
  • The writing of "kang" is distinctive, while the fire radical at the base of "xi" is relatively broad
  • Commercial kilns often used apocryphal "Da Ming Chenghua Nian Zhi" marks

Yongzheng (1723-1735)

  • Six-character regular-script marks, neat and refined, often considered the high point of Qing reign-mark calligraphy
  • The character "yong" is compact, with fine, taut strokes
  • Seal-script marks begin in the Yongzheng period, commonly arranged in three lines of two characters

Qianlong (1736-1795)

  • Seal-script marks are most prevalent, with complex structures that are difficult to copy convincingly
  • Regular-script marks are slightly less forceful than Yongzheng examples and tend to look broader and flatter
  • Survives in the largest numbers, and is also the most heavily reproduced

Three Common Traps

1. Apocryphal Marks

Many Qing commercial kilns wrote earlier dynastic marks, especially "Da Ming Chenghua Nian Zhi." These are not always intended as forgeries; they often reflect a literati homage to the past. The key is to judge the period through body, glaze, form, and decoration as a whole.

2. Later Imitation Marks

From the late Qing through the Republican period, Yongzheng and Qianlong imperial wares were widely copied. The marks may resemble the originals in outline but often lack spirit. Soft, scattered brushwork, uneven spacing, and an overly bright glaze are common warning signs.

3. Added Marks

A reign mark may be added later to an otherwise genuine unmarked piece in order to increase value. Under strong light or ultraviolet light, compare the glaze over the mark with the glaze on the surrounding body. Added marks often look newer or show traces of a second firing.

  • 10x loupe: for examining brush starts and stops, and bubbles in the glaze
  • UV lamp: for detecting added marks and restoration
  • Reference book: Zhongguo Gu Taoci Kuanzhi, edited by Feng Xianming