Filmikehityksessä

Filmikehityksessä refers to the process of developing photographic film. This is a crucial step after exposing the film to light within a camera. The latent image created by the light needs to be made visible and permanent.

The process typically involves several chemical baths. First, the film is immersed in a developer solution. This chemical reacts with the exposed silver halide crystals in the film's emulsion, converting them into metallic silver. Areas of the film that received more light will develop more silver, forming the darker parts of the image.

Following the developer, the film is usually rinsed. Then, it is placed in a stop bath, which halts the development process by neutralizing the developer. The next stage is the fixer bath. The fixer removes the unexposed silver halide crystals, making the image stable and no longer sensitive to light. Without this step, the image would continue to degrade when exposed to light.

Finally, the film is thoroughly washed to remove any residual chemicals and then dried. The resulting processed film contains a negative image, where light and dark areas are reversed compared to the original scene. This negative can then be used to create positive prints on photographic paper. Different types of film, such as black and white, color negative, and slide film, require specific developing chemicals and processes, but the fundamental principles of converting light exposure into a visible image remain the same.