Blog

• Densitometry - Offset Print Quality Control 10-23-2013
  Densitometry, colorimetry, and spectrophotometry are the three methods used to measure color in the graphic arts. The densitometer measures optical density. It…Read More
• Dampening Solution Ingredients 10-22-2013
  Dampening solutions are usually sold as concentrated solutions that are diluted with water to the proper concentration. In concentrated from, it is commonly ref…Read More
• Basic Functions of Dampening Solution 10-21-2013
  The primary function of solution is to desensitize the nonimage areas of the printing plate to ink. A surface that is "desensitized to ink" is a surface that in…Read More
• Ink Film Thickness 10-20-2013
  The thickness of the ink film on the rollers is a very important consideration in printing. Typical ink film thickness on a lithographic press is 0.2~0.4 mils (…Read More
• Design Principles of Inking Systems 10-19-2013
  A few important design principles are built into the inking system. Each of these helps to optimize the efficiency of the inking system for depositing an even f…Read More
• Inking Systems for Waterless Lithography 10-18-2013
  Waterless lithography requires a printing press that is equipped with a temperature control system, Figure 3-8. Two types of press temperature control systems a…Read More
• The Typical Inking System 10-17-2013
  The inking system, or inker, of most large sheetfed presses in Figure 3-7 usually has at least ten rollers and consists of the following parts:
  
  . Ink fountain…Read More
• Inking System Functions 10-16-2013
  The inking system of an offset press serves five important functions: (1) ink milling, (2) varying ink input across the system, (3) storing ink for consistent i…Read More
• Small Offset Presses 10-15-2013
  Generally, any press smaller than 11 x 17in. (279 x 432mm) without bearers (hardened metal tings attached to the ends of the cylinder or to the cylinder's journ…Read More
• Perfecting Press 10-14-2013
  Most sheetfed presses can print on side of the sheet in a single pass. For the other side to be printed, the entire paper pile must be turned over and the paper…Read More
• Multicolor Press 10-13-2013
  A press consisting of several printing units (each with its own inking and dampening system), a feeder, a sheet transfer system, and a delivery is called a mult…Read More
• Printing Auxiliary Equipment 10-12-2013
  Auxiliary equipment for a sheetfed press is composed of those devices that perform specialized operational functions. These devices can significantly improve pr…Read More
• Direct-Imaging Presses 10-11-2013
  A printing press that uses a laser system to image plates directly on the plate cylinder is referred to as direct-imaging press. The first printing press with o…Read More
• Cylinder Arrangements 10-10-2013
  Although the three-cylinder arrangement is the most common for sheetfed presses a number of other cylinder arrangements may also be encountered. Following is a…Read More
• Single-Color Press 10-09-2013
  A press consisting of a single printing unit, with its integral inking and dampening systems, a feeder, a sheet transfer system, and a delivery is called a sing…Read More
• Press Configurations 10-08-2013
  A variety of sheetfed printing presses are available. These presses can best be classified according to their offset press cylinder configurations (arrangements…Read More
• Basic Systems of Sheetfed Offset Presses 10-07-2013
  A sheetfed press consists of a feeder, one or more printing units, a sheet register system including transfer devices to move the paper through the press, a del…Read More
• Lithographic Plate Composition 10-06-2013
  A conventional lithographic plate consists of two distinct surface areas. The image areas are oleophilic, meaning that the surface will readily attract oily ink…Read More
• Types of Lithographic Plates 10-05-2013
  Contact plates. A high percentage of today's commercial printing plates are made photographically using either negative or positive film. These plates are coate…Read More
• Introduction to Lithographic Plates 10-04-2013
  There are a variety of plates used in lithography. Each type of plates may have characteristics that make it suitable for a given type of press or type of produ…Read More