A safelight should be selected to match the film manufacturer's specifications to avoid excessive:

• A. Heat damage
• B. Film fogging
• C. Image contrast
• D. Image latitude

Answer: (B)

Safelight compatibility with the film is about preventing unintended exposure of the emulsion during handling. The safelight should emit light only within the spectral range and at an intensity the film can tolerate, as specified by the manufacturer. If the safelight is too bright or uses a wavelength the film is not designed for, the unexposed film can be exposed slightly, creating a uniform haze called fog. This fog raises the base plus fog density and reduces image contrast, making details harder to see. By matching the safelight to the film’s specifications, you keep this unwanted exposure minimal and preserve image quality.