Certified Professional Photographer Practice Exam 2025 – All-in-One Guide to Achieve Your CPP Success!

Question: 1 / 465

What is the purpose of antihalation coating on film?

To enhance color saturation

To prevent light from reflecting back through the emulsion

The purpose of antihalation coating on film is primarily to prevent light from reflecting back through the emulsion. When film is exposed to light, it is important that the light only affects the emulsion in the areas where it is intended to create an image. If light were to reflect back from the film base, it could cause unwanted halation effects, which manifest as lightened or blurred areas around the edges of highlights. This coating effectively absorbs any stray light that might reflect back, ensuring that the image maintains better sharpness and contrast.

In contrast, enhancing color saturation typically relies on the chemistry of the emulsion itself rather than coatings. The development process and film sensitivity are influenced by the film's formulation and characteristics, not by antihalation layers.

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To speed up the development process

To increase film sensitivity

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