Color FM screen printing new technology

In recent years, color gradation screen printing technology has been widely adopted. Color portraits on round necks and various color boxes of light boxes can be seen on the streets. In the innovative development of screen printing, manufacturers have accumulated Certain experience has contributed to the promotion of color gradation screen printing technology. Judging from the trend of the entire screen printing industry, the speed of development is gratifying.
There is no end to learning, and art is endless. There is no end to the continuous improvement of screen printing technology. At present, the color gradation screen printing plate still uses the traditional screening method, and the screen reproduces the depth of the manuscript from different points of equal area. Due to the improperly arranged dot overlap angles or the angles that are intertwined with the screens, there are often moiré patterns that affect the picture quality. Of course, it is also possible to avoid moiré under a certain number of screen meshes and screen lines. The issue of moire has been discussed in several articles in the “Serigraphy” journal: Last May, the “China Screen Printing Association's Delegation to Visit Europe” brought back some screen printing products from Europe. According to the analysis, these products were adopted. The new process of “frequency modulation and screening” has produced very good results. The printed copy is very similar to the manuscript and can reproduce the color and gradation of the manuscript, just as Rong Baozhai’s woodcut watermark can reach the level of “spuriousness”. .
What is "FM screening"?
In the article “Colored FM Plus High Fidelity Making Technology” written by Guan Zhixiang, director of the Beijing Xinhua Color Printing Factory, he said: “Traditional printing technology is to change the depth of color into dots of different sizes, which is a way of 'modulating amplitude'. The technology of FM network is based on the density of dots to express the density, which is a kind of frequency modulation method.” The article summarizes the advantages of six aspects: First, the use of FM screening image fidelity, its color reproduction range, printing density The sharpness of the image is better than that of the traditional dot. Second, the scanning time is shortened, which significantly improves the platemaking efficiency. Third, the moire can be avoided. “Because the dot distribution of the FM network is irregular, there is no fixed angle, it According to the value of the dot density value, the color shades, the level contrast, and the subtle levels are expressed, so that no moire is formed for the overlapping colors. Fourth, the high definition of the reproduced image is the largest in the FM screening process. Features. “The best reflection of the shoulders and intermediate tone levels is better than the traditional electronic reality”, improving the smoothness and exquisiteness of the product; the fifth is “outputting high quality images with lower resolution”; The reproduction of Chinese paintings can solve more than four colors, such as the six-to-eight-colored moiré problem, which will bring the quality of Chinese painting to a new level.
FM screening technology has been applied to the color desktop printing (color DTP) system. This system was jointly developed by Peking University Founder Group Company and Beijing Xinhua Color Printing Factory. It was organized and accepted by the Press and Publications Agency in May 1994, and was A number of printing plants have achieved good social and economic benefits through their productive operation. Although all of the new technologies mentioned here belong to the scope of offset printing, there is also a close relationship with screen printing. Since traditional dot printing has been applied to screen printing, the same applies to FM dot printing and screen printing. The advantages of the technology should be the same as those of plain printing. Screen printing products brought back from Europe can be used for reference to improve the level of domestic screen printing technology.
On September 10, 1996, some members of the Old Screen Printing Association in Beijing were invited to visit the screen printing factory of Shengfang Red Star in Pazhou City. Everyone on the first successful printing of large-format color-graded screen printing works “Women "Fashion drawings" are more appreciated. The factory quickly completed the test printing work in only a few months, and the printed samples are colorful, overprinting accurate, and others admire admiration. In the south of Guangdong's Shunde area, about 70% of the year ago, color-tone screen printing products were printed on the deputy-face. At that time, landscapes, fruits, and other scenes dominated the picture. Today's products in the north have more difficult characters. Make screen printing products more abundant. Whether it is the South or the North, large-format screen printing adopts the traditional screening process, but the quality of these products can be comparable with offset printing, and some special effects are better than offset printing.
At present, although color tuning screen printing products in China are not adopting the new process of “frequency modulation and screening”, it is likely that it will not be long before the development trend of the screen printing industry. The new process of “frequency modulation and screening” is applied to screen printing. Fine products. This is an optimistic forecast and it will wait and see if it is correct.