Diazo

Diazo
abbreviation of diazonium compounds, which decompose under the action of intense blue or ultraviolet radiation, forming an image in an azo dye.
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diazo emulsion
an emulsion for making a screen printing stencil that is sensitized with diazo chemicals rather than a bichromate sensitizer to make it light sensitive.
diazo-photopolymer
refer to dual-cure emulsions.

The commonly used photographic light-sensitive materials are the silver halides used in films and papers, diazo dyes, and bichromated gelatin.

See also: Image, Ground, Format, Silver, Exposure