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The history of the printing press
The invention and development of the printing press has played a significant role in the dissemination of human civilization and culture. In 1439, Gutenberg of Germany made a wooden relief printing press. This vertical, screw-type hand-operated printing press, though simple in structure, remained in use for 300 years; in 1812, Koenig of Germany produced the first flat-bed rotary printing press; in 1847, Hoe of the United States invented the rotary printing press; in 1900, a six-color rotary printing press was produced; and in 1904, Rubel of the United States invented the offset printing press.
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What is the control principle of an intaglio printing press?
The tension zones of an intaglio printing press can be divided into three areas: unwinding tension zone, printing tension zone, and slitting tension zone. The unwinding tension zone includes the tension control from the paper core to the feed tension roller in the guide group; the printing tension zone includes the tension control from the feed tension roller in the guide group to the delivery tension roller in the printing group; the slitting tension zone is from the delivery roller in the printing group to the slitting tension roller. For intaglio printing presses without a slitting group but only a rewinding group, the slitting tension zone includes the area from the paper tension roller to the rewinding shaft.
What are the four colors in four-color printing? An explanation of the secrets of four-color printing
Four-color printing refers to cyan, magenta, yellow, and key color (black).
Ink knowledge for gravure printing machines
Plastic gravure inks are generally used for printing plastic films such as PE, PP, OPP, and NY, but can also be used for printing composite flexible packaging. As long as the printed surface does not have large color blocks after rewinding and cold air inspection, the composite odor and fastness are acceptable.
Safety operating procedures guide for gravure printing machines
As an important piece of equipment in the printing industry, the safe operation procedures of rotogravure printing machines are crucial for ensuring the personal safety of operators and the normal operation of the equipment. The following are the safety operation procedures for rotogravure printing machines: I. Operation Preparation 1. Operators must be familiar with the structure, performance, and operation methods of the rotogravure printing machine and must pass professional training before they can take up their posts. 2. Before starting the machine, check whether all parts of the equipment are intact, especially whether the electrical parts are safe and reliable. 3. Ensure that the printing materials, inks, and other auxiliary materials meet the requirements for use, and prepare the necessary tools and protective equipment. II. Safety Operation Precautions 1. During operation, keep the surrounding area of the equipment clean to prevent debris from entering the machine and causing damage or danger. 2. Operators should wear protective equipment, such as gloves and masks, to prevent harm from inks and other harmful substances. 3. Strictly follow the equipment operation procedures and do not arbitrarily change parameters or operate illegally. In case of abnormal situations, stop the machine immediately for inspection. 4. During equipment operation, it is forbidden to touch moving parts to avoid accidents such as pinching. 5. Regularly clean up ink residue and dust inside the equipment to maintain the cleanliness and hygiene of the equipment. III. Maintenance Requirements After Operation 1. After operation, turn off the equipment power and perform daily maintenance and maintenance work. 2. Clean up debris and ink residue around the equipment to ensure that the equipment is in good condition. 3. Regularly conduct comprehensive inspections and maintenance of the equipment, and promptly identify and address potential safety hazards. By strictly adhering to the safety operation procedures of rotogravure printing machines, we can ensure the smooth progress of the printing process, while ensuring the personal safety of operators and the long-term stable operation of the equipment.
What are the differences between two-color, four-color, five-color, and six-color printing presses?
The difference between two-color, four-color, five-color, and six-color printing presses lies in the number of colors they can print.