In the new phase of the excavation work in Sanxingdui, the "black technology" 3D printing technology uses a 3D scanner to collect information and data about cultural relics and their surrounding areas, and then uses a 3D printer to produce identical plaster models. The printed plaster model was used to make a tight and protective silica gel protective case.

After the protective case was attached to the cultural relics, the cultural relics were extracted by means of a box.

3D printing protective cover than stick film, soft cloth effect is better, because of the viscosity, played the best role in the protection of large copper.
According to experts, this is the first time for Chinese archaeologists to use 3D printing technology for the extraction of cultural relics, which is an innovative way. Because the relics in Sanxingdui have been buried underground for more than 3,000 years, they are fragile and can be damaged if they are not careful. And this extraction of the same Zun, plus the filling inside, weighs about 1000 jin, in the extraction of more careful.

In the past, cultural relics are extracted by wrapping plastic film and soft cloth, while silica gel film can better adhere to the surface of cultural relics, and silica gel itself has a certain viscosity, can be better attached to the surface of cultural relics, can provide better protection for cultural relics.