Q1, why should I go online?
A1. In the printing process, it is seldom in the same embossing that different thick and light shades of the ink will be displayed. So when you want to express the shades in the same shade of ink, the printing of early banknotes is to use gravure to engrave lines Density and density are used to express shades and shapes, but this process is time-consuming and expensive, so using neatly arranged dots to express shades with different dot sizes is a fast and practical traditional AM amplitude modulation screen technology, which is used in photography Platemaking technology has been used for more than 100 years.
Q2. How are the outlets of line 150 and line 175 calculated?
A2. In the world, the vast majority of AM outlets are counted by a dot matrix of lines per inch. Only Germany occasionally counts by the number of lines per centimeter. 150 lines means that there are 150 × 150 lines per inch = 22,500 dots. The larger the number, the more dots, the more difficult to print. Under good paper printing conditions, it can express very detailed image quality. The number of lines above 300 lines is very good. It feels close to continuous adjustment. On the contrary, the coarse paper should be counted with thick wire.
Q3. How to calculate the percentage of outlets? What are the minimum and maximum percentages?
A3. The percentage is calculated based on the area of ​​the point. Ask how much the size of the point accounts for the area in the 100% square and determine its percentage. The minimum and maximum point values ​​used for printing are based on the results of printability. The performance range of the fine screen is narrower, and the range of the coarse screen is wider, but all types of paper are also printed by the printing body. There will be different expressions. For example, in 175-line advanced printing, the minimum is usually about 3%, and the maximum is 96%. If it is small, it does n’t make much sense.
Q4. What is a square point? What are chain points? What are the advantages and disadvantages of each?
A4, the square point and the chain point are two points. The smallest or largest point is the shape of a round point. The difference in shape is between 30 and 70% (especially at 50%). The square point will A checkerboard showing a black and white pattern on a checkerboard; chain-like dots will appear like a chain. The dots are connected back and forth, but the left and right are not connected, and the narrow part is like the distance shape of the chain waist. The square-shaped dots are sharp and powerful, and the version is heavier in the middle tone. It is suitable for metal industrial products; while the chain-shaped dots are smooth and suitable for skin tones or supple.
Q5. What is an FM network? what is the benefit?
A5, FM frequency modulation network is a fixed-distance dot size expression method relative to AM amplitude modulation network technology, and the finer (such as 2400dpi, 3600dpi) 11μ and 8μ fine dots are used to arrange different densities with random grain parameters. Therefore, the CMYK four colors that can avoid the AM network must have the wrong network angle of different network angles, and the resolution is better. Therefore, the four-color, six-color, seven-color, and eight-color printing do not have to be turned to avoid the wrong (crash) network. In the case of a low resolution file size of only about 50%, it can achieve the fineness of the performance of the AM network, that is, the particles composed of finer particles to show better resolution, 2400dpi is the common type, 3600dpi is difficult to print Not commercialized.
Q6. What are the shortcomings of FM FM network?
A6. The roughening phenomenon of the first-generation FM network is serious, and the second-generation is much improved, but in the end, the optical and flat networks are slightly inferior to the AM network. The FM network is composed of very fine particles, so CTP printing plates and general printing plates should still be careful of exposure and development, and they are also very sensitive to dust. The printing pressure should be correct, and the dots cannot be increased too much. A slight tremor will also cause a large change in tone. It is difficult to visually evaluate the percentage of FM FM network dots with a magnifying glass.
Q7. What kind of screen is the FM FM network suitable for?
A7, FM FM network is suitable for heavy texture with many image margins and high sharpness, such as steel, metal, rock, oil painting and dark-colored landscape figures, as well as mesh fans, air conditioners, bicycles, jewelry, text and fine pictures, etc. , Using 2400dpi has the expressive power of AM300 line.
Q8. What is the unsuitable picture for FM network?
A8, FM FM network is not suitable for light-tone and smooth pictures, such as morning fog in the landscape, light white skin or non-textured pictures, flat nets, etc.
Q9. Does the FM network show the benefits of small file images taken by digital cameras?
A9, FM FM network can have more than double the area of ​​the analytical performance of the AM network, and even 180dpi is like 300dpi.
Q10. In comparison, is the AM network useless?
A10, AM nets are recognized in the traditional work environment and operators, and the printing on flat screens, light color and texture-free flat tone has excellent performance, especially chain nets will be better.
Q11. Is it more expensive to print on FM?
A11. Basically, the material process changes are very small, but its software is slightly more expensive, the attention of plate-making printing must be strengthened, and the selection of printing conditions is stricter. The cost of plate-making will be 10 to 20% more. An estimate of 15 to 25% more costs is appropriate.
Q12. What is the future prospect of FM FM network?
A12, FM FM network can be smoother in the future without restrictions on working content. With the use of CTP, there will be fewer restrictions before printing, so its printing will develop normally. In addition to four-color printing, when the performance of Hi Fi Color must use six-color or seven-color printing, FM FM network is more conducive to development in this regard.
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