the C-41 process and colour negative print materials with the RA-4 process. These processes are very similar, with differences in the first chemical developer.

The C-41 and RA-4 processes consist of the following steps:
# The colour developer develops the silver negative image by reducing the silver halide crystals that have been exposed to light to metallic silver, this consists of the developer donating electrons to the silver halide, turning it into metallic