Graphic Partners of Texas

a Buck Enterprises, Inc. company

Post Office Box 9, Frisco, Texas 75034-0009 • office 972. 769. 9307 • toll free 888. 860. 3612

 

Graphic Partners of Texas - Lithography Color

Vivid or High Quality
Color is produced on high tech expensive equipment operated by a craftsman press operator.  The project is usually printed at 155 lpi or greater on a six or eight color press.
Digital optical calibration of the colors on the press to assure consistency in the ink coverage and colors.

One of the cylinders will have a coating of varnish or aqueous to give the colors a higher sheen to the images.

Special ef
fects are available with spot colors or dull and gloss varnished areas. 

Separate process of die cutting, embossing or hot stamping to enhance the finish project in appearance and feel.

Binding of the book, catalog or magazine is done in perfect bound or sewn stitch binding of pages to include heavy weight or hard covers.
 
Lithography Printing  - The earliest regular use of lithography for text was in countries using Arabic, Turkish and similar scripts, where books, especially the Koran, were sometimes printed by lithography in the nineteenth century, as the links between the characters require compromises when movable type is used which were considered inappropriate for sacred texts.

High-volume lithography is used today to produce posters, maps, books, newspapers, and packaging — just about any smooth, mass-produced items with print and graphics on it. Most books, indeed all types of high-volume text, are now printed using offset lithography.

In offset lithography, which depends on photographic processes, flexible aluminum, polyester, mylar or paper printing plates are used in place of stone tablets. Modern printing plates have a brushed or roughened texture and are covered with a photosensitive emulsion. A photographic negative of the desired image is placed in contact with the emulsion and the plate is exposed to ultraviolet light. After development, the emulsion shows a reverse of the negative image, which is thus a duplicate of the original (positive) image. The image on the plate emulsion can also be created through direct laser imaging in a CTP (Computer-To-Plate) device called a platesetter. The positive image is the emulsion that remains after imaging. For many years, chemicals have been used to remove the non-image emulsion, but now plates are available that do not require chemical processing.  If this image were directly transferred to paper, it would create a mirror image and the paper would become too wet. Instead, the plate rolls against a cylinder covered with a rubber blanket, which squeezes away the water, picks up the ink and transfers it to the paper with uniform pressure. The paper rolls across the blanket drum and the image is transferred to the paper. Because the image is first transferred, or offset to the rubber drum, this reproduction method is known as offset lithography or offset printing. http://www.compassrose.com/static/Offset.jpg.
 
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