After the official seal is covered, it will not fade for many years. Because the official seal is dipped in special seal ink when it is used. This printing ink will stick to the official seal more evenly through the mutual pressure between the inkpad and the official seal. Because the official document paper has certain oil absorption, after the official seal is stamped, the ink will be sucked away and float on the official document. In addition, the custody measures of the later official documents will not fade even if they have been stamped with official seals for many years.

Seal introduction

Seal cutting is an art combining sculpture and calligraphy, and it is an artistic style closely related to China's calligraphy and painting. Because of its unique function, seal plays an important role in the field of antique appreciation in the antique market. There are many names of seals, not less than a dozen, mainly including: seal, treasure, seal, book, map, seal, seal and so on.

In ancient times, seals were generally called seals. After the Qin Dynasty unified China, only the seal of the Emperor was called the seal, and the rest were called the seal. In the Han dynasty, governors called it Feng, generals called it Feng, and others called it Feng. Later, in the Qing Dynasty, the emperor's seal was called Xi, and it was changed to Bao. The seal above the prince is called treasure, the official below the county king is called seal, and the private seal is called seal.

The title of seal is irrelevant and unlimited, but seal is still the most common. Modern seals have many uses, such as wooden rubber seals for children's toys, student seals for teaching, numbers for restaurants and other places, and letter seals for educating children. The gasket is composed of photosensitive pad and ink storage pad. And ink is divided into water-based ink, oily ink and so on.