Authenticity Appraisal of Jewelry Testing Certificate of China Geo University
Now some criminals forge documents and sell fakes, which is hard to prevent. We consumers should know how to identify the authenticity of certificates and take up legal weapons to safeguard their rights and interests. Here, let's talk about some details of identifying the authenticity of land certificates in China.
1. temperature change technology: the GIC logo in the lower left corner of the front of the certificate is printed by temperature change technology, and only special equipment can print it. When it encounters high temperature (such as lamp baking, hair dryer baking, fire baking), the logo will disappear, and it can be restored when the temperature drops.
2. Color-changing fluorescence: The logo and characters of GIC Jewellery Institute are in the upper right corner of the front of the certificate, which is almost invisible on the front, but can be clearly seen on the side, and the red luminous logo and characters can be clearly seen under the purple light.
3. Certificate inquiry: Inquire through the only official website of Jewelry Testing Center of China Geo University.