There, every day thousands of pages are mechanically engraved onto rotogravure cylinders, typically a steel base with a copper layer of about 0.1 mm in which the image is transferred.
A number of new advancesincluding offset lithography, flexography, relief print, screen printing, rotogravure, and digital printinggreatly reduced the number of workers needed in the modern printshop and newspaper composing room.
