Black-and-White Film Developers What Happens to Silver-Based Films during

In chromogenic black-and-white film, as in most color films, the developing process creates both silver particles and dyes. During processing, the silver is removed in a bleaching process, leaving a negative image formed only by the dyes. Ilford and Kodak both make chromogenic black-and-white films that are developed in the C-41 color negative process.