How to develop film photos?

Film processing is a method of developing films in various liquids using developer and fixer.

After the film was exposed, some silver halides produced latent images under the action of light. These latent images are invisible to people, and they must be developed and fixed to become visible images, and then printed or enlarged to get photos consistent with the brightness of the scene.

Therefore, if you want to get photos after shooting, you must go through the steps of film development, fixing, negative film conversion (developing or enlarging) and so on.

The development process is to reduce the silver halide that has been exposed to light on the film into metallic silver by the reduction of the developer. Because the sensitivity of different parts of the film is different, more or less silver particles are reduced, so the density of different parts of the film is different, while unexposed silver halide remains on the film.