Final answer:
For improved viewing of radiographs, mounts should be made of black paper, as it reduces reflections and enhances contrast.
Step-by-step explanation:
In the context of radiography, when creating mounts for the purpose of improving the viewing of radiographs, the ideal material for these mounts is black paper. Radiographic mounts made of black paper help reduce light reflection, providing a better contrast for viewing the subtle details within the radiograph. In comparison, materials such as stainless steel and aluminum are highly reflective, and cardboard does not offer the same level of contrast enhancement as black paper does.