The source of gypsum signature is mainly due to its high strength, wear resistance and pressure resistance. , and also has good plasticity and processability, which can meet the needs of signature.

In some special cases, people will sign the plaster. For example, in the basketball game, players need to rest after being injured, and they will sign their names on the plaster as a special commemoration. In addition, some people will sign their names on the plaster as a sign of a sense of accomplishment. For example, mountaineers will sign their names on the plaster after reaching the summit.