A process by which cloud effects or other features not in the original negative are introduced into a photograph. Portions, such as the sky, are covered while printing and the blank space thus reserved is filled in by printing from another negative. [Webster 1913 Suppl.]

bat printing, bureau of engraving and printing, collotype printing, government printing office, intaglio printing, letterset printing, offset printing, photo-offset printing, planographic printing, printing, printing business, printing company, printing concern, printing equipment, printing ink, printing machine, printing operation, printing out, printing press, printing process, printing unit, process printing, relief printing, united states government printing office, us government printing office