Which of these is a common sign of overdeveloped radiographs?

Excessively dark images are a common sign of overdeveloped radiographs. When the developing process is prolonged or the developer solution is too concentrated, the film can absorb too much radiation, resulting in images that are overly dark. This excess darkness can obscure important diagnostic information, making it difficult for a clinician to assess the radiograph accurately.

In contrast, clear images would indicate proper development, where detail is preserved without excessive density. Faded images may be a result of underdevelopment or inadequate exposure, leading to a lack of sufficient contrast. High contrast refers to a clear distinction between different densities on the radiograph and does not correlate with overdevelopment; rather, it is often a characteristic of well-balanced film processing. Thus, excessively dark images distinctly point to the issue of overdevelopment in radiographs.