In film processing, which step stops the development process?

In film processing, which step stops the development process?

• A. Develop
• B. Rinse
• C. Fixer
• D. Wash

Answer: (B)

Stopping development happens when no active developing agent is left in contact with the film. Rinsing with water removes the developer and dilutes any residual chemical, so the reduction reaction cannot continue and the image is fixed at the chosen development time. The other steps serve different roles: development creates the image by reducing exposed silver halide, fixer removes unexposed silver halide and makes the image permanent, and washing cleans away all remaining chemicals afterward. Therefore, rinsing acts to halt further chemical activity and is the step that stops development.

Stopping development happens when no active developing agent is left in contact with the film. Rinsing with water removes the developer and dilutes any residual chemical, so the reduction reaction cannot continue and the image is fixed at the chosen development time. The other steps serve different roles: development creates the image by reducing exposed silver halide, fixer removes unexposed silver halide and makes the image permanent, and washing cleans away all remaining chemicals afterward. Therefore, rinsing acts to halt further chemical activity and is the step that stops development.