Section 2 Seals
Collecting seals is very helpful for the identification of paintings and calligraphy. One can be used to prove the circulation of calligraphy and painting works. Arrange the era of the collector to clarify its inheritance, that is, what the predecessors called "circulating". Secondly, there are several connoisseurs such as Liang Qingbiao and An Qi, whose eyesight is quite high, and the vast majority of the calligraphy and paintings that have been stamped by these two people are fine. In addition, the collection seal can at least provide a reliable basis for inferring the lower age of the work. If a painting has the collection seal of Emperor Huizong of the Song Dynasty, it can be determined that this work is also the latest of the Northern Song Dynasty; if there is a collection seal of Zhang Ugly, it can be said that it is also the late Ming Dynasty at the latest; if there is a collection seal of Liang Qingbiao, then it can be inferred that this is also a work of the early years of the Qing Dynasty at the latest.
There is also a more obvious clue in the collection printed in the royal court. The Northern Song Dynasty and Song Huizong had a set of collection seals, which were placed in a fixed position in calligraphy and painting, and the seven seals were: "Royal Book" Gourd Seal, Double Dragon Square Seal or Round Seal, "Xuanhe" Square Seal, "Xuangong" Square Seal, "Zhenghe" or "Zhenggong" Square Seal, "Daguan" Square Seal, "Inner House Book Seal" Dafang Seal. The above seven seals are all Zhu Wen. It is known as the "Seven Seals of Xuanhe". Whoever has the complete seven seals is in the original format of Xuanhe. Due to the long history of the times, most of the calligraphy and painting works collected by Xuanhe Inner House have been reframed many times by future generations, and it is difficult to preserve the original.
The part of Zhao Tuo's (Song Huizong) collection of seal covers is roughly as shown in the figure:

◇ 1: "Imperial Book" gourd seal.
◇2: Double Dragon Round Seal or Double Dragon Square Seal.
◇ 3-6: Year number printing, these parties print plutonium cover, sometimes slightly interchangeable.
◇ 7: "Seal of the Inner House Book" Da Fang Seal.
◆ The framed form of calligraphy works in "Xuanhe Shi" is basically the same as that of painting, except that the front yellow silk is separated from the water
The square seal on the "Double Dragon" was changed to the "Double Dragon" round seal, and the position of the plutonium was not on the label, but under the label
The seam between the square and the original sheet. Another form of Mounting for Xuanhe is the album. Emperor Huizong of Song had ordered people to "go up to Cao Fu."
Xing, down to Huang Juyu, set into a hundred ranks, fourteen doors, a total of 1,500 pieces, the name of the "Xuanhe Rui lan."
Set.com. ”
However, collectible seals, like the seals of calligraphers and painters, are not necessarily reliable. Since future generations can take the imprint of the calligrapher and painter as a forgery, it is natural that they will also take the collector's seal as a forgery. The more famous collectors' seals, the more people imitate them, and stamps such as Xiang Yuanbian's "Tianlai Pavilion" have been engraved many times. Moreover, the ancient collector's connoisseurship and judgment were always limited, and even if he had really collected it, the seal he had collected was also true, then all that was not seen was the real thing. Today's calligraphy and painting appraisal still needs us to comprehensively analyze and investigate, and we cannot only rely on Tibetan prints to determine authenticity.