In photography, a bleach is a chemical solution used to reduce the density of an image by removing or lightening metallic silver in a print or negative. Bleaching is often applied in black-and-white darkroom processes or alternative photographic techniques to adjust contrast, correct overexposure, or create artistic effects. Proper use of a bleach allows photographers to refine tonal balance, highlight details, and achieve precise image control in traditional and experimental photographic work.