① The photosensitive effect of X-ray film is improved, and the Radiation exposure to human can be greatly reduced; Provided conditions for capturing high-density and thick tissue; Shortened exposure time and reduced motor blurring of active organs; Extending the service life of the ball tube; Expanded the scope of use of small capacity X-ray machines.

② Increased contrast of X-ray images, especially during low tube voltage projection.

③ The clarity of X-ray images has been reduced due to factors such as fluorescence diffusion effect, X-ray oblique effect, poor screen adhesion, and enhanced screen spots (noise).