Ammonium chloride is a chemical commonly used in photographic toners and bleachers to modify or enhance the appearance of black-and-white prints. In toning processes, it can help achieve specific color tones, improve archival stability, and adjust contrast, while in bleaching it assists in controlling the removal of silver from the emulsion. Proper use of ammonium chloride allows photographers and darkroom technicians to refine image aesthetics, extend the longevity of prints, and produce consistent, high-quality results. It remains an important component in traditional darkroom workflows and alternative photographic processes.