Dye destruction or dye bleach is a photographic printing process, in which dyes embedded in the paper are bleached (destroyed) in processing. Because the dyes are fully formed in the paper prior to processing, they may be formulated with few constraints, compared with the complex dye couplers

Dye couplers

Dye coupler is present in chromogenic film and paper used in photography, primarily color photography. When color developer develops exposed silver-halide crystals, the developing agent molecules become oxidized, and the oxidized developer molecules react with dye coupler molecules to form dye in...

 that must react in chromogenic

Chromogenic

Chromogenic refers to color photographic processes in which a traditional silver image is first formed, and then later replaced with a colored dye image.- Description :...

 processing. This has allowed the use of richly colored, highly stable dyes.
It is a reversal process, meaning that it is used in printing transparencies (diapositives).

Ilfochrome

Ilfochrome

Ilfochrome is a dye destruction positive-to-positive photographic process used for the reproduction of slides on photographic paper. The prints are made on a dimensionally stable polyester base, essentially a plastic base opposed to traditional paper base...

(originally Cibachrome) is currently the only widely available dye destruction process, and is known for its intense colors and archival qualities.
Older dye destruction processes included Utocolor (early 1900s) and Gasparcolor (1930s).