2. Use professional seal software for anti-counterfeiting. Generally, scratches are made on the border or text of the seal. Now the local public security department has opened the seal information management system. The seal has a seal number, which is the only number in the country. Through the number, you can query the detailed information of the company (the information filed by the Public Security Bureau), as well as the anti-counterfeiting appraisal of the company seal.
3, from the seal anti-counterfeiting steganography or mark recognition. In order to facilitate the identification of authenticity and prevent forgery, some seals, especially some seals that are more important in use, are marked with anti-counterfeiting notes or marks when engraving. If these secret notes or marks are found missing or inconsistent with these secret notes or marks, they can be judged as false seals.
4. The method of identifying seals One of the characteristics that distinguishes China's calligraphy and painting from the West is that the author should not only sign the title, but also stamp the seal engraved by the other party. Calligraphy and painting are like dragons, and printing is the finishing touch. This can be described as China's independence (Lu Xun's words).
5. Angle of view refers to the angle of stamping. Although most people want to stamp correctly, there will always be some deviations, especially the circular seal is more difficult to grasp. However, when a computer makes a seal, 100% must be a positive number by default. Let's take a look at the comparison of the true and false seals above.
6. There are two main ways to identify the authenticity of a seal: one is based on the seal pattern of the official seal, and the other is based on the physical entity of the official seal. The seal style of the official seal. According to the regulations, the seal specifications of different organs and organizations are different.