Offset Lithography
Stone Lithography: drawing with a litho crayon
Offset Lithography
Stone Lithography: rolling on the ink
More about inking a plate: http://entertainment.howstuffworks.com/stone-lithography5.htm
Offset Lithography
Stone Lithography: multiple colors on separate plates
violet
brown
Each plate is drawn and aligned by hand.
Offset Lithography
Stone Lithography: multiple colors on separate plates
grey tint
orange
Offset Lithography
Stone Lithography: multiple colors on separate plates
deep grey
mid grey
Offset Lithography
Stone Lithography: multiple colors on separate plates
brown
The Finished Print
Offset Lithography
Stone Lithography: a small contemporary press
Offset Lithography
Stone Lithography: a larger press
Offset Lithography
Offset Lithography: printer’s marks
A. Star target
B. Registration mark
C. Page information
D. Trim marks
E. Color bar
F. Tint bar
Offset Lithography
Offset Lithography: color separations
Composite image printed on a color laser printer compared to
four-color separations printed on an imagesetter.
Offset Lithography
Offset Lithography: raster image processing (RIP) software
Raster Image Processing: the process and the means of turning vector digital information such as a
PostScript file into a high-resolution raster image, and preparing color separations for plates.
Offset Lithography
Offset Lithography: platesetter
A platesetter (or imagesetter) is a machine which receives a raster image from a
raster image processor and in turn, creates a lithographic plate suitable for use on
an offset press.
Offset Lithography
Offset Lithography: polyester lithographic plate
Offset Lithography
Offset Lithography: cylinders
Offset Lithography
Offset Lithography: cylinders
Offset Lithography
Offset Lithography: 2-color press
Offset Lithography
Offset Lithography: 4-color press
Offset Lithography
Offset Lithography: web press
Offset Lithography
Offset Lithography: photo of the offset rollers
Offset Lithography
Offset Lithography: halftone
greyscale in halftone, AKA screens
Offset Lithography
Offset Lithography: halftone
angles
Offset Lithography
Offset Lithography: halftone
printed photograph in glossy magazine
Offset Lithography
Offset Lithography: halftone
zoom in
Offset Lithography
Offset Lithography: halftone
zoom in to see rosettes
Offset Lithography
Offset Lithography: spot colors
Offset Lithography
Offset Lithography: spot colors
Offset Lithography
Offset Lithography: 6-color press