A reproductive process primarily used for photographs from the 1880s to the 1950s. A relief halftone block is prepared by printing a screened negative face down on a copperplate coated with fish glue. The unexposed areas remain soluble after development and are washed away, then the plate is acid etched.
Synonyms and Related Terms
color relief halftone; block process
Sources Checked for Data in Record
- Luis Nadeau, Encyclopedia of Printing, Photographic, and Photomechanical Processes, Atelier, New Brunswick, 1997
- B. Gascoigne, How to Identify Prints, Thames & Hudson, London, 2004