Why are some of the stamps in Guangdong’s red cultural tourism passport poorly stamped?

Stamping materials and surfaces, stamping techniques.

1. Stamping material and surface: The stamping material and surface smoothness will affect the stamping effect. The material is not suitable for stamping. The paper is too thin or the surface is too rough, which will cause the seal imprint to be blurred or incomplete.

2. Stamping technology: Improper sealing strength, angle and speed, uneven or diagonal sealing will affect the sealing effect.