A sensitometric strip provides measurements of which properties?

• A. Fog
• B. Speed
• C. Contrast
• D. Fog, Speed, and Contrast

Answer: (D)

A sensitometric strip is used to evaluate how the film–screen system responds to exposure by creating a controlled range of densities. The unexposed areas show the baseline or fog level, which tells you about unwanted density from processing or contamination. The point on the curve where a given optical density is reached indicates the film’s speed—how much exposure is needed to produce a certain density. The steepness of the density vs exposure curve in the useful range reflects contrast; a steeper slope means higher contrast. By examining these aspects together, you can quantify fog, speed, and contrast, making the strip a comprehensive tool for assessing film performance.