American Society for Nondestructive Testing (ASNT) Radiographic Testing Practice Test

Question: 1 / 400

What is the main purpose of the fixation process in radiography?

To enhance the developed image

To remove undeveloped silver salts and harden the gelatin

The fixation process in radiography serves a crucial role by removing any undeveloped silver salts from the film and hardening the gelatin emulsion that contains the developed image. After the development stage, the film contains both developed and undeveloped silver halides; if left on the film, these undeveloped salts could eventually lead to fogging or discoloration. By using a fixer solution, these unwanted silver salts are dissolved and washed away, which stabilizes the image and ensures its permanence. Additionally, the hardening of the gelatin layer helps protect the emulsion from damage and enhances the overall durability of the radiographic film, making it important for preserving the quality of the image throughout its handling and storage. Thus, the fixation process is integral to the production of a clear, stable radiographic image.

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To increase film sensitivity

To improve image resolution

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