Photo processing: Photoshop in CMYK settings-Photoshop, Graphic processing – printing industry
The print parameter setting, is a very important function, it can ink color, dot gain, color separation and other aspects of setting parameters. These parameters are for four-color offset printing equipment features of the system set up, it can also be used to create other output modes (such as color ink-jet, etc.) of the output file, and simulate the offset printing process of color separation processing.
HC printing network Image processing software Photoshop (document / Color Settings / CMYK settings / CMYK mode / built-in) the Print Parameter settings, is a very important function, it can ink color, dot gain, color separation and other aspects of setting parameters. These parameters are for four-color Offset printing The device features of the system set up, it can also be used to create other output modes (such as color Ink jet Etc.) of the output file, and simulate the offset printing process of color separation processing.
Detail below about what this setting parameters and the specific meaning of each parameter, which is printed in foreign affairs is very important for the staff.
1.Ink Options (ink option) This includes the following two: (1) Ink Color (ink color) This option provides the ink color selection criteria. Options include Custom (custom) and some commonly used offset printing ink standards. One commonly used offset printing ink standards include, for example SWOP (Specificationsfor Web OffsetPublications) used in the United States, Toyo Ink used in Japan, Eurostandard common in Europe. In accordance with the printing paper such as coated paper (Coated), offset paper (Uncoated) and newsprint (Newsprint) have different standards. Users should be aware of whether your printer ink or close to using these kind of ink, such as close can be used. Such as the ink used in ink with the options set the standard deviation too far, they must develop their own ink standard.
Custom (custom) option is used to make their own ink standard, this option includes nine calibration blocks of color, yellow, goods, green, red, green, blue, synthetic black bag, black [ Y, M, C, MY (R), CY (G), CM (B), K (CMY), W, K], the impact of the first 6 colors maximum, which respectively represent CMYK color space of six angle . Customize the basic method of special ink: The ink used in printing systems in their own print out the calibration nine field blocks of color were measured using the colorimeter tristimulus values of the various blocks of color XYZ, and then use the formula X = X / (X + Y + Z) and Y = (X + Y + Z) coordinates were calculated remarkable degree of x and y, where Y is the brightness of coordinates, value of small 0-100, X, y values of 0-1. Then fill the measure to the various blocks of color Yxy the chromaticity coordinates and be named and stored, thus completed the production of a specific ink. Alternatively, you can use the Settings button at the bottom of the dialog box select the L "a" b "color space as the color of the test blocks of color values. Yxy and L" a "b" is the absolute color space of the two forms of expression , are interchangeable between the two spaces.
Typically use coated paper printing, the approximation using the SWOP (Coated), or Eurostandard (Coated), with offset printing paper can be used close to SWOP (Uncoated) or Eurostandard (Coated), the printing press similar to using SWOP (Newsprint) or Eurostandard (Newsprint). Domestic standard ink ink is not completely consistent with the foreign, the ink has not joined the ink in the table in advance, but can not find in the table similar to the ink, then use the custom ink. Another situation is to use a spot color ink to replace the primary color inks to produce special effects, such as certain Packaging Printing Substitute chemicals with special red color of red ink, magenta looks better than the more vivid.
Present, various non-offset printing color output technology more widely used, such as color inkjet output mode, it uses the inkjet ink can be divided into four-color CMYK. Since many inkjet output software does not have the characteristics according to the paper and ink color separation ability automatically, when you can use the offset color separation settings to simulate.
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