Which of the following statements about manual processing is true?

The statement regarding manual processing that is true is that it requires a longer developing time. Manual processing typically involves several steps: developing, rinsing, fixing, and washing the film, each of which must be performed at specific intervals. Compared to automatic processing, which is streamlined and mechanically controlled, manual processing usually takes more time due to the need for careful timing and individual handling of each step.

Longer developing times allow for more precise control over the film development process, which can ultimately lead to improved image quality if done correctly. Understanding the manual processing method's duration is essential for dental professionals, as it directly impacts the efficiency of workflow in dental radiography.

In contrast, the use of higher temperature solutions is generally associated with accelerated development times in automatic processors rather than manual processing. The idea that it eliminates the chance of film contamination is misleading, as manual processing can still lead to contamination through handling. Lastly, manual processing is often more susceptible to operator error due to the increased number of steps and the requirement for human oversight and timing, making it less reliable than automated systems.