When carrying out a Radiographic Test on a weld, what is put on the opposite side to record the test?

In a Radiographic Test (RT) conducted on a weld, photographic film is placed on the opposite side to record the test results. The purpose of this film is to capture the radiation that passes through the weld and into it, allowing for the detection of any internal imperfections such as cracks, voids, or inclusions within the weld material.

When the radiation (usually X-rays or gamma rays) strikes the film, it creates a latent image that can later be developed to reveal the quality of the weld joint. The density and clarity of the developed image can then be analyzed by qualified personnel to assess the integrity of the weld. The use of photographic film is crucial because it directly translates the detected radiation into a visual format that can be examined and archived for quality control and certification processes.

Other options, such as a penetrameter or an Image Quality Indicator, serve a different purpose in the context of radiographic testing. A penetrameter is used to measure the radiographic sensitivity and determine the quality of the radiographic image. An Image Quality Indicator is similar and is designed to provide a measure of the film's sensitivity to radiation, ensuring adequate exposure has been achieved, but does not serve as the very medium that records the image itself