Offset Lithograph- process
lithography always begins with a
photograph of something. It can be a
photograph of an original painting, a
landscape, or a new car. In a
laboratory the photograph is separated
by a special camera into the four basic
color elements which are red, yellow,
blue and black. A negative is then
made for each color. In the print shop
the four-color negatives are used to
produce four printing plates. The
structure of the images on these plates
is of mechanically spaced dots. These
plates are then mounted on a for color
press and all four colors are printed
simultaneously. It is possible to
proceed from the photograph to the
finished product in two days. In viewing
a print produced in the above manner
through a magnifying glass, the four
color inks will appear as dots neatly
arranged in rows. This tells you the
plates were made photo-mechanically
and not by an artist hand.