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The problems faced by Guangdong's packaging and printing industry after its accession to the WTO are: Packaging design and print quality have reached first-rate international standards to meet the needs of the international market. Peers must be aware of people and have appropriate countermeasures to make the benefits of WTO entry on the industry better than harm.
In order to make the packaging and printing industry more adaptable to the severe challenges after its accession to the WTO, we will only give lectures on the causes and solutions to the main quality problems of the typographical processes, offset press structures, printing colors, and typographical products that were toured by printing companies in various parts of Guangdong in recent years. In accordance with the "practical, necessary, systematic, refined" principle, compiled as "lithographic technology management personnel and lithographic offset technology necessary professional knowledge workers 1-18", sub-periodical. Looking forward, we can help improve the professional quality of Guangdong Pingyin industry technical team.
First, the professional knowledge of the printing process, the method of coordinating the offset printing and the printing process
As the prepress process has become more specialized, Guangdong Printing Factory, the main process for the print-offset - after printing. The printing process has a great influence on the quality of printed products, which often leads to conflicts with the next process. Effectively doing a good job in the data-based operation of the printing process is an urgent task for the provincial printing companies.
Second, the common meaning of India's commonly used terms - light irradiation objects, showing the form, color, light and shade. The object shows a continuous halo of dark to light or light to dark, and is expressed on the printed matter by the size of the dots to form a shade of gray. This shade of tone is called hierarchy.
Deep - refers to the process of network transfer, that is, transfer from the positive to the printing plate, or from the printing plate to the printed sheet, and the corresponding network is fully expanded.
Shallow - Ibid., the corresponding outlets have been reduced.
Flat - Ibid., the corresponding outlets, small outlets expanded, and the large outlets remained unchanged, so that the contrast of the picture adjustment was reduced.
å´ - Ibid., the area of ​​net-extension in the high-profile area has been expanded, and the screen adjustment has been reduced. Loss of hierarchy.
Density - Exposure of the photosensitive film to black levels after development. The greater the density, the darker the black.
Contrast - refers to the difference between the maximum and minimum density of the picture.
Highlight - Fingerprint screen area 0î€1-1 into halftone area.
High-key – refers to the area of ​​1-3 screened sheets.
Midtones - guides the area of ​​the screen 4-6 into the screen.
Low-key - refers to the area of ​​the printed sheet 7-9 screen.
Continuous tone - reflects the picture level by density.
Halftoning - reflects the picture hierarchy from outlets. (To be continued)
Lithography Technology Manager Professional Knowledge (I)
The first section of the professional knowledge of the printing process Introduction The main key process of packaging and printing is the plain printing. The main problem with plain printing is that the quality of the product is unstable and there are good times. The root cause of this phenomenon lies in the management of enterprises - standardization, data management, and the professional level of technical managers, especially those who operate on offset presses. There are many skilled workers in Guangdong who have many years of practical operation experience. The key to their further improvement lies in systematically understanding and mastering the professional technical theories.