Lithographic printing processes

Ambergum . [Aqualon] Cellulose deiiv. replaces gum arabic in lithographic printing processes. 

Uses Provides better coating coverage, improved wetting and dilution stability in printing industry when used in heat-set, offset lithographic printing processes as a topcoat on printed paper provides antistatic props. eliminates excessive ink buildup Features Usually diluted 40 1 with water exc. dilution stability good freeze-thaw stability... 

Wilson, Daniel G. Lithography Primer. 3d ed. Pittsburgh GATF Press, 2005. An illustrated overview of each step in the lithographic printing process. Includes chapters on topics such as plate imaging, inks, and papers. 

Figure 12.11. A simple representation of the process and components associated with four common graphic arts printing technologies screen, flexographic, gravure, and lithographic printing.

Fig. 29.1. Mechanisms of letterpress, offset lithographic/flexo-graphic, and gravure printing processes.12...

Inks that are printed by the flexo-graphic and gravure printing processes are characterized by their extremely fluid nature, and are generally termed liquid inks. When compared to the fluid nature of flexo-graphic and gravure inks, lithographic and letterpress inks are much more viscous and paste-like. 

Lithographic printing which was invented by Alois Senefelder over 180 years ago, has probably been the most widely studied of all the printing processes. Despite this, many questions remain and a total understanding of the lithographic process still eludes us. This is due largely to the complex interactions which occur on press between the ink and the dampening solution. 

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