Radiographic density
Radiographic density indicates how strongly a material is penetrated by X-rays or gamma rays. The thicker the material and the higher its density, the more radiation is absorbed.
Physical-Chemical Mechanism
Densitometric film density is a measure of the blackening of an X-ray or gamma-ray film after exposure and development. It is directly related to the thickness and density of the material being penetrated. The more radiation the material absorbs, the darker the film becomes.
Metallurgical Relevance & Welding Risks
When inspecting materials and components, film density is crucial for detecting internal defects such as cracks or voids. Too high a density can cause excessive blackening, making the film hard to read. Too low a density can cause fine defects to be missed.
Workshop Practice & Operating Instructions
To get an accurate film density, the material thickness and density must be precisely known. The radiation source must be set accordingly to get the desired blackening. During film development, it's important to follow the correct time and temperature to get a clear and sharp image.