What is the maximum acceptable increase in density during a darkroom fog test?

The maximum acceptable increase in density during a darkroom fog test is 0.05. This measurement is crucial to ensure that the radiographic film has not been compromised by fogging, which can occur due to inadequate protection from light or excessive exposure to radiation or chemicals. A density increase of more than 0.05 indicates that the film may have significant fogging, which can obscure the diagnostic information and lead to inaccurate readings.

Maintaining an increase within this limit is essential for ensuring the quality and reliability of radiographic images. It reflects proper darkroom practices and confirms that there are no external factors degrading the film's quality. Hence, adherence to this standard is part of best practices in radiography, ensuring that films are processed under optimum conditions for accurate interpretations.