Improvement of output quality of rip in the hottes

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The improvement of the output quality of Founder century rip

only improving the running speed and efficiency may not obtain the best output quality. This article provides some experience to share with you on improving the output quality of Founder century rip. As we all know, founder century Rip is a product used for high-end color reproduction. It has the characteristics of rich point levels, smooth gradients, comprehensive shapes, and support for color management. The above features of Founder century show that it has the ability of high-quality color reproduction. However, if it is not set properly, you may still encounter moire, collision and other problems. According to my personal experience, as long as you master the following skills, you can easily control founder century rip, obtain high-quality output and printing effect, and conduct pressure test on coal and rock

shape/user defined shape

for offset printing (lithography), it is recommended that you use the default setting of Founder century rip - circular dot. Pspnt 2.0, the latest version of Founder century rip, uses the latest technology to generate circular points, further improving the output quality of circular points. For the printing process of frequently printing figures, it is not recommended to use square dots, because square dots will jump at 50% and affect the restoration of skin color, which is determined by the characteristics of square dots. For silk printing, it is recommended that you select founder FM in founder century rip and set the corresponding point size as required. For gravure printing, founder century rip recommends that you use gravure printing. Gravure printing is a special form of Founder century rip, which is suitable for gravure printing process. Tip: in order to realize the unique lowering function of gravure printing, please be sure to select the "direct input curve" option when setting the linearization curve with gravure printing

there is an option of "user defined hanging parameter" in founder century rip. Please choose this option carefully during output. The shapes provided in founder century rip have been strictly tested. When the output film is printed, you can obtain exquisite prints. If you select "allow" in "user defined hanging parameters", founder century rip will use the shapes provided in the application for output, which may lead to the decline of printing quality and even serious accidents such as moire and collision. Therefore, rip from any manufacturer does not promise to guarantee the output quality of user-defined shapes. In addition, if you select matte printing in the application, be sure to set the "user-defined hanging parameter" in founder century rip to "not allowed", otherwise the four-color chips will be 45 degrees, causing a collision accident


the imagesetter has different dot enlargement rates for different films. For some Agfa films, the Agfa imagesetter does not need to adjust the linearization curve. However, if the Agfa imagesetter uses films from other manufacturers, the linearization curve needs to be adjusted. This does not mean that the films from other manufacturers are bad, but that such films do not match the Agfa imagesetter. If you want to obtain high quality, the dot enlargement rate of the film must be within 10%. If the film fails to meet this requirement, you'd better replace the film of other brands. In addition, after linearization, confirm that the point is expanded within 1%. Only in this way can the output film truly reflect the creativity of the designer

output resolution/eye

the human naked eye can distinguish about 256 levels. To ensure that the output film can reach 256 levels, it is necessary to achieve

(output resolution ÷ mesh) 2 = 256

that is, the output resolution ÷ mesh

that is, for the output accuracy of 2400dpi, the highest output mesh is 2400 ÷ 160 mesh; For the number of hanging meshes higher than 150, it is better to use a higher resolution, which theoretically requires 175 × 16 (00dpi, it is recommended to use 3000 or 3600 to output 175 mesh or higher hanging requirements.

the best resolution of the image

each image has a resolution. What is the appropriate resolution for the image when composing? For the image used for printing, it is recommended to determine the resolution according to the following formula. The best resolution of the image =1.5 or 2 × For example, when the number of eyelets is 175, the resolution is 300dpi or 350dpi, and the minimum is not less than 250dpi. Otherwise, Masek may appear when the image is output to the film

hanging gray levels

increasing the number of hanging gray levels can improve the output quality of the gradient, but it should not exceed 1024 gray levels at most, because after the level is higher than 1024, the improvement in quality can no longer be distinguished by the naked eye, but it has a great impact on the running speed of rip. Of course, when adding the hanging gray level, you must set the "rip parameter/picture quality" option to "fine", otherwise the setting of the gray level will not work

tip: in software such as wits, you can also set the gray level of gradient. As here, it is recommended that the maximum gray level set in VIX should not exceed 1024, because if the level is higher than 1024, it will also have a great impact on the running speed of rip

FM points

in some cases, you may use FM points. Founder century rip provides two FM points for you to choose from. Better printing quality can be obtained by using frequency modulation points. However, because the printing process of frequency modulation points is quite different from that of AM points, if frequency modulation points are used to output films, it is necessary to notify the subsequent processes such as plate printing and printing in advance, otherwise, there will be a vicious accident of losing points during plate printing, resulting in a decline in printing quality. Tip: the default point size of Founder century Rip is 2 × 2. You can also adjust the dot size according to different printing processes

rgb output

the printing process finally uses CMYK four-color ink to restore all designs and ideas. Because the color gamut ranges of CMYK and RGB are not completely coincident, it can be proved theoretically that the colors that RGB can express cannot be 100% restored by CMYK ink. Therefore, it is best to use only CMYK pictures in typesetting. For RGB pictures, it is recommended to use the design software to convert to CMYK before typesetting. If you receive a file that has been discharged into RGB pictures from users who rarely consider taking thermal insulation measures for their houses in China, it is recommended to print the color separation in the application as much as possible to ensure that the color restoration is as close as possible. If you want to perform matte printing, it is recommended to use the color management (option) of Founder century rip to calibrate RGB to CMYK. Founder color management system adopts Kodak's key technology in color management, which can best realize the restoration of RGB color. If you do not want to perform matte printing, you can use the RGB to CMYK color correction built in founder century rip. In this case, it is recommended to set the color correction file in Photoshop, so that you can use the color correction function of Photoshop to restore the color of RGB images as much as possible

hollowing out settings

founder century rip allows users to customize hollowing out parameters. If you have already set hollowing out parameters in the application, you must select the option "allow users to customize hollowing out parameters" during matte printing, otherwise the hollowing out parameters you set in the application will be replaced by "black version does not hollowed out", causing quality problems

film density

the field density of the output film of the imagesetter is between 4.0 and 4.2, which can obtain the best output quality. Tip: the minimum output density shall not be less than 3.5. The main factors affecting the film density are: film type, exposure strength, various structural parts of large aircraft, automobile engine shell and wheel hub in China, development time, development temperature, etc. Each time you change different batches of glue instead of standard brand chemical film, change the developing or fixing solution, and change the developing time and temperature, you need to re output the test film, and reset the exposure intensity and linearization curve. Tip: for the Phototypesetter that has been used for a long time, different densities may occur at different positions on the same film. This problem is caused by the aging of the laser tube and is not controlled by rip

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