n. The act, art, or practice of impressing letters, characters, or figures on paper, cloth, or other material; the business of a printer, including typesetting and presswork, with their adjuncts; typography; also, the act of producing photographic prints. [ 1913 Webster ]

Block printing. See under Block. --
Printing frame (Photog.), a shallow box, usually having a glass front, in which prints are made by exposure to light. --
Printing house, a printing office. --
Printing ink, ink used in printing books, newspapers, etc. It is composed of lampblack or ivory black mingled with linseed or nut oil, made thick by boiling and burning. Other ingredients are employed for the finer qualities. Ure. --
Printing office, a place where books, pamphlets, or newspapers, etc., are printed. --
Printing paper, paper used in the printing of books, pamphlets, newspapers, and the like, as distinguished from writing paper, wrapping paper, etc. --
Printing press, a press for printing, books, newspaper, handbills, etc. --
Printing wheel, a wheel with letters or figures on its periphery, used in machines for paging or numbering, or in ticket-printing machines, typewriters, etc.; a type wheel. [ 1913 Webster ]

. (Photog.) 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. ]

. (Photog.) A method of printing, in which the image is fully brought out by the direct actinic action of light without subsequent development by means of chemicals. [ Webster 1913 Suppl. ]