What is the function of a radiographic film in RT?

The function of a radiographic film in Radiographic Testing (RT) is to capture X-ray exposure. When X-rays pass through an object and reach the film, they interact with the film's emulsion, resulting in a latent image that represents the varying densities of the object being examined. This captured image reflects the internal structure of the material being tested, allowing technicians to identify any defects, such as cracks or voids, based on the film's density and contrast.

The ability of the film to record X-ray exposure is critical because it allows for the visualization of subsurface flaws that may not be apparent through direct observation. The film must be developed in order to produce a visible radiographic image for interpretation, making it an essential tool in non-destructive testing practices. Thus, the primary role of radiographic film is as a medium for capturing the effects of X-ray exposure in a way that can be analyzed for assessment and quality control purposes.