Offset lithography operates on the principle that grease (ink) and water won’t mix. The image information being printed is placed on thin metal plates which during the printing process are continually dampened by water. The oil-based ink only adheres to the image (greasy) areas and the water dampens only the non-image (non-greasy) areas. The inked areas are then transferred onto a rubber cylinder (called a blanket) and then onto the paper as it passes around the blanket. The process is called offset since the image doesn’t go directly from the plates and onto the paper, but is offset or transferred to another surface that acts as the intermediary.
The founder of downthetubes, John works as a comics editor, writer, as Creative Consultant on the Dan Dare audio adventures for B7 Media, and on promotional work for the Lakes International Comic Art Festival. Working in British comics publishing for over 30 years, his credits include editor of titles such as Doctor Who Magazine, Star Trek Magazine and Babylon 5 Magazine. He also edited the comics anthology STRIP Magazine and edited several audio comics for ROK Comics. He has also edited several comic collections, including volumes of “Charley’s War and “Dan Dare”. He’s the writer of “Crucible”, a creator-owned project with 2000AD artist Smuzz, published on Tapastic; and “Death Duty” and “Skow Dogs” with Dave Hailwood for digital comic 100% Biodegradable. View all posts by John Freeman