Simply increasing the operating speed and operating efficiency does not necessarily result in 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, with rich dot levels, smooth gradients, comprehensive mesh shape, and support for color management. The above characteristics of Founder Century indicate that it has the ability to reproduce high-quality colors, but if it is not set up properly, you may still encounter problems such as moire and netting. According to my personal experience, as long as you master the following skills, you can easily control the Founder Century RIP and obtain high-quality output and printing results.
Mesh / User-defined mesh
For offset printing (offset printing), it is recommended that you use the default setting of Founder Century RIP-circular dots. The latest version of Founder Century RIP, PSPNT 2.0, uses the latest technology for the generation of circular dots, further improving the output quality of circular dots. For the printing process that often prints characters often, it is not recommended to use square dots, because square dots will produce jumps at 50%, which affects the restoration of skin color. This is determined by the characteristics of square dots. For screen printing, it is recommended that you choose the Founder FM network in Founder Century RIP and set the corresponding dot size as needed. For gravure printing, Founder Century RIP recommends that you use gravure mesh. The gravure mesh shape is a unique mesh shape of the Founder Century RIP, which is suitable for the gravure printing process. Tip: In order to realize the unique net reduction function of gravure printing, when setting the linearization curve using the gravure mesh, be sure to select the "direct input curve" option.
In the Founder Century RIP, there is an option of "user-defined network connection parameters". Please select this option carefully when exporting. The meshes provided in Founder Century RIP have been rigorously tested, and you can get exquisite prints when outputting the film for printing. If you select "Allow" in "User-defined screen-hanging parameters", Founder Century RIP will use the mesh provided in the application for output, which may lead to a decline in printing quality and even serious accidents such as moire and netting. . Therefore, any manufacturer's RIP does not promise to guarantee the output quality of user-defined mesh. In addition, if you have selected masked printing in the application, please be sure to set the "User Defined Screening Parameters" in the Founder Century RIP to "Not Allowed", otherwise the four-color film will appear at a 45-degree screen angle, causing The accident of hitting the net.
Linearization
The imagesetter has different dot expansion rates for different films. The AGFA imagesetter does not need to adjust the linearization curve for some AGFA films, but if the AGFA imagesetter uses films from other manufacturers, it is necessary to adjust the linearization curve. This is not to say that the film from other manufacturers is not good, but this film Not compatible with AGFA imagesetter. In order to obtain higher quality, the film dot expansion rate should be guaranteed within 10%. If the film cannot meet this requirement, it is better to replace the film of other brands. In addition, after the linearization is completed, it is necessary to confirm that the dots are expanded within 1%. Only in this way, the output film can truly reflect the creativity of the designer.
Output resolution / mesh
The human eye can distinguish about 256 levels. In order to ensure that the output film can reach 256 levels, it needs to be (output resolution ÷ mesh) 2 = 256
Output resolution ÷ mesh
That is to say, for the output accuracy of 2400DPI, the highest output mesh is 2400 ÷ 160 mesh; for the number of meshes higher than 150 mesh, it is better to use a higher resolution, which theoretically requires 175 × 16 (00DPI, It is recommended to use 3000 or 3600 to output jobs that require 175 mesh or higher.
Image best resolution
Each image has a resolution. What is the appropriate resolution for the image in the group version? For printing images, it is recommended to determine the resolution according to the following formula. The best resolution of the image = 1.5 or 2 × the number of hanging meshes For example: when the number of hanging meshes is 175, the resolution is 300dpi or 350dpi is the best, the minimum should not be less than 250dpi, otherwise the image may be output on the film Masek appears.
Grid gray level
Increasing the number of gray-level layers connected to the network can improve the output quality of the gradient, but the maximum should not exceed 1024 gray-levels, because after the level is higher than 1024, the improvement in quality can no longer be discerned by the naked eye, but it has a relatively faster speed of RIP Big impact. Of course, when adding the gray level of the grid, the "RIP parameter / picture quality" option must be set to "fine", otherwise the settings related to the gray level will not work.
Tip: In software such as WITS, you can also set the gray level of the gradient. As here, it is recommended that the highest gray level set in Weiss should not exceed 1024, because after the level is higher than 1024, it will also have a greater impact on the running speed of RIP.
FM outlets
In some cases, you may use FM outlets. Founder Century RIP provides two FM outlets for you to choose from. The use of FM dots can get better printing quality, but because the printing process of FM dots is quite different from the amplitude modulation dots, if you use FM dots to output film, you must inform the subsequent printing, printing and other processes in advance, otherwise, it will appear A dot is lost during printing, resulting in a vicious accident in which the printing quality is reduced. Tip: The default dot size of Founder Century RIP is 2 × 2, and you can also adjust the dot size according to different printing processes.
RGB output
The printing process ultimately uses CMYK four-color inks to restore all design and creativity, because the color gamut range of CMYK and RGB is not completely coincident, theoretically it can be proved that the colors that RGB can express cannot be 100% restored by CMYK inks . Therefore, it is best to use only CMYK pictures when typesetting. For RGB pictures, it is recommended to use design software to convert to CMYK and then typeset. If you receive a file that has been sorted into RGB pictures from the user, it is recommended to perform color separation printing in the application as much as possible to ensure that the color reproduction is as close as possible. If you want to perform masked printing, it is recommended to use the Founder Century RIP color management (optional) for RGB to CMYK correction. The Founder color management system uses Kodak ’s key technology in color management to best achieve RGB colors. Of restore. If you do n’t want to perform the color 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 as much as possible. The color of the RGB image.
Cutout setting
Founder Century RIP allows users to customize the hollowing parameters. If you have already set the hollowing parameters in the application, be sure to select the "Allow user-defined hollowing parameters" option when printing the mask, otherwise the hollowing parameters you set in the application Will be replaced by "black version not hollow", causing quality problems.
Film density
The solid density of the output film of the imagesetter is between 4.0 and 4.2, and the best output quality can be obtained. Tip: The minimum output density must not be less than 3.5. The main factors affecting film density are: film type, exposure intensity, development time, development temperature, etc. Each time you replace a different batch of film, change the development or fixing solution, change the development time, temperature, you need to re-output the test film, and reset the exposure intensity and linearization curve. Tip: For imagesetters that have been used for a long time, different densities may appear on different locations 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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