What is the general material of the grid

The grid is a product used to filter out the influence of scattered rays on the film. So many people are curious, what material is it made of?
According to the material of the grid, there are two forms:.
1. Commonly used grids-the internal spacers are made of non-metallic materials, such as wood chips, paper
Non-metallic low-density materials such as sheets and plastics.
2. All metal grid—–the inner spacer is made of metal material: aluminum sheet. Its high strength and resistance
Good moisture performance.
The appearance of the grid is a flat plate with a thickness of 4-8mm. The internal structure is formed by intersecting many thin lead strips. The two lead strips are filled and positioned with materials that are easy to penetrate X-ray, and glued together. The filler can be wood, paper or aluminum sheet. Finally, the top and bottom are encapsulated with thin aluminum plates to form a grid plate. Seen from the cross section, the arrangement direction of the lead strips of the filter plate will gather to one point. Seen from the entire grid, there is a line of convergence.

Author：Lillian