The selection criteria are considered in the same way as AM screening, but the following flexible applications are admired. Staccato 10 Product catalogs, atlases, painting reproductions, postcards, etc. Staccato 20 Product catalogs, posters, etc. Staccato 25 Commercial rotation of books, advertisements, etc. Staccato 35 Posters, packaging, etc. Staccato 36 News rotation Staccato 40 News, wide open posters, etc. Staccato 70 Outdoor Billboard V. Increase of dots and tone compensation of FM screening In the printing process, it is almost impossible to avoid the increase of dots. The dot gain phenomenon is divided into two types: physical dot gain and optical dot gain. No matter-? @ ç§ occurs at the junction of the line part and the non-line part. The amount of occurrence will be the total length of the surrounding (the thick line in Figure 4), the printing environment will be different according to the type of printing machine and the arrangement of the cylinder (see Figure 4). As such outlets increase, AM outlets and FM outlets are very different. What usually becomes a problem is the increase in physical dots. Because the total length of the FM screen is always long. If you print without compensation, the FM screen will undoubtedly have a darker tone than the AM screen. In order to minimize the difference of the hue as much as possible to obtain a natural effect, at the time of FM screening, when the image was output from the CTP to the printing plate, the tone was compensated. In the case of Staccato, first calculate the difference between the reproducibility of AM screening and FM screening, draw a compensation curve, and then respond to the four colors of YMCK with a compensation curve, which makes it easy to match the tone. . 6. The vividness of FM screen It is generally believed that FM screened prints are always bright in color. This is caused by the effect of increased optical dots. As mentioned above, it is mentioned that the increase in dots occurs at the junction of line parts and non-line parts. Like the increase in physical dots, the increase in optical dots also occurs at the junction. The increase in physical dots is actually a phenomenon in which the ink image (ink film) is crushed and becomes larger, and the increase in optical dots seems to reflect the larger dots in the human eye. Compared with the actual manuscript, the printed image on the AM screen print has a muddy feeling. This is not the turbidity of the ink itself, but the turbidity felt when the white paper surrounding the ink image is reflected in the human eye. It can be seen from Figure 6 that when the dot increase occurs, FM screening has a larger dot increase than AM screening, so it is difficult for the naked eye to feel the whiteness of the paper, which reduces the color turbidity. . According to this phenomenon, the color of the ink image looks vivid). Furthermore, in the case of Staccato, efforts were made on the arrangement of various color ideas, by reducing overlap, thereby reducing the color turbidity caused by the white reflected light from the paper and the overlap of ink, and at the same time, the ink film was thin and the middle tone was improved. Color saturation plays a role. 7. FM screening and ink consumption reduction effect Not available for AM screening, one of the greatest strengths of FM screening has the effect of reducing ink consumption. As mentioned earlier, the AM screen is different in the size of the dots, and the ink is viscous. The thickness of the ink film (the amount of ink) on the large and small dots is different. Therefore, the amount of ink is not uniform, and the amount of ink supply has to be adjusted during the printing process (toggle the ink key). On the other hand, the FM screen is a fine idea, the amount of ink has a certain limit, the ink film is also thin and uniform, can supply a minimum amount of ink can be printed, thus saving ink consumption. According to the printing test of Creo's official printing presses, 18-34% of ink-saving reports have been reported. Considering the increase of the dots again, FM screening and AM screening are used to obtain the same reproduction. Comparing the compensated image area (inking area) on the printing plate, a 10% area difference occurs. In fact, measuring ink consumption on a printing company's web offset press also yielded an average savings of 15-17%. Regardless of the printing aspect, from the perspective of saving ink consumption, it also shows an effect that cannot be ignored. However, this is from the perspective of gradation images such as photography and equal density. If it is text or only the low-side printing on the ground, then FM screening and AM screening are exactly the same. Furthermore, even with a tone image, the cut effect will be different due to the depth of the tone. 8. Conclusion As far as the current printing industry does not expect major technological innovations, as a strategy for the differentiation of printed products, with the popularization of CTP, it is absolutely true to re-evaluate the effect of FM screening. However, it is still in the early stages, and there are still many problems to be solved. The current prepress engineering and printing workflow is mainly based on the process of AM screening. Among them, just changing the screening to FM screening will bring a lot of problems to be solved to color reproduction and other aspects. When solving these problems, making FM screening a perfect workflow, this is not only to improve the software of FM screening, but also to improve ink, paper, plate material, dampening potion, blanket, printing Faced with these problems that need to be solved in various aspects such as the computer, it is the best strategy to expect the relevant manufacturers to adopt a coordinated system. Shelf Bracket ,Metal Shelf Brackets,Black Shelf Brackets,Folding Shelf Bracket Jiangmen Sunbond Houseware Manufacturing CO.,LTD , https://www.sunbondhw.com
Despite this distinction, there is no need to stick to this, and you should consider how to adapt to the printing environment of the respective company to choose, just like AM screening.
FM Screening Trend (Part 2)