acid resist—Any substance that prevents the action of an acid or mordant on the surface of a plate.

actinic light—Light that possesses the radiant energy necessary to produce chemical changes in light-sensitive photographic emulsions. In orthochromatic film and dichromate emulsions, the UV and blue-green end of the spectrum has the greatest effect.

agitation—The regular or intermittent movement of a plate, film, or solution to allow fresh chemicals to periodically or constantly reach the material being processed.

à la poupée—(French, “with a doll”) The use of different daubers of different colors to ink small areas of a plate so as to distribute several colors over different areas of the plate.

alcoholSee ethyl and isopropyl alcohols. ...

Get Copper Plate Photogravure now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.