Stamps are used as stationery printed on documents to indicate identity or signature. Generally, seals should be dyed with pigments before printing. Those that are not stained with pigment and will appear concave and convex after being printed on a flat surface are called steel seals, and some are printed on wax or wax, or wax prints on envelopes. What are the production materials? Jade, metal, wood, stone, etc. Seal is one of the representatives of China traditional culture.
Origin:
The oldest lettering in China is the stone carvings of Oracle Bone Inscriptions, Zhou and Qin in Yin. All words engraved on gold, copper, jade and other materials are generally called "Jinshi". The seal is contained in the "stone". The origin of Xi seal, or Shang Dynasty, or Yin Dynasty, is still inconclusive. According to relics and historical records, it appeared at least in the Spring and Autumn Period and the Warring States Period, and it was widely used in the Warring States Period.
At first, it was only used as a voucher for commodity exchange. After Qin Shihuang unified China, the scope of the seal was expanded to prove the rights and interests of those in power, and it was held by those in power as a tool for ruling the people.