If humidity drops below the standard, what effect is expected on the film?

• A. No noticeable effect
• B. An increase in static marks on the film will result
• C. The film will become sticky
• D. The film will appear darker

Answer: (B)

Low humidity increases static electricity, which shows up as static marks on film. In dry air, charges can build up on the film and surrounding surfaces, and when the film is moved or separated, those charges discharge and create visible marks on the emulsion. These static marks often appear as fine, branching patterns and are more likely when handling film or during long storage. This is why the expected effect is an increase in static marks. Humidity changes aren’t the cause of the film appearing darker or becoming sticky in this context, and the prominent, recognizable issue at low humidity is static electricity.