User manual KONICA MINOLTA COLOR PAGEPRO EX

[. . . ] Foreword This manual explains the functions and operation of the MINOLTA Color PagePro Ex printer. It also gives some troubleshooting tips as well as general precautions to be observed when operating this printer. To ensure the best performance and effective use of your printer, please read this manual carefully from cover to cover. After you have read through the manual, keep it near your printer for future reference. [. . . ] These colors are called the additive primaries. White is created by adding the maximum amount of red, green, and blue light available. Black occurs wherever all three colors are absent. Grays are created by adding varying amounts of all three colors together. Combining varying amounts of any two of the additive primaries creates a third, saturated hue. A familiar device that uses this color model is the computer monitor. Monitors have red, green, and blue phosphors that emit varying amounts of light to display a given color. Scanners create digital representations of colors by measuring their red, green, and blue components through colored filters. Subtractive (CMY and CMYK) color The subtractive color model is used in color printing, and in color photographic prints and transparencies. While the additive color model simulates the visible spectrum of color by adding light of three primary hues, the subtractive color model uses a "white" or neutral light source containing light of many wavelengths. Inks, toners, or other colorants are used to selectively absorb (subtract) certain wavelengths of light that otherwise would be reflected or transmitted by the media in question. 5-4 Color Management Chapter 5 The Properties of Color The subtractive primaries are cyan, magenta, and yellow; they absorb red, green, and blue light, respectively. Combining any two subtractive primaries creates a new color that is relatively pure or saturated. For example, you can make red by combining magenta and yellow, which absorb green and blue light, respectively. White occurs when no colorant is applied. Combining all three subtractive primaries in theory yields black, but due to deficiencies of cyan, magenta, and yellow colorants, combining these three primaries actually yields a muddy brown. Black colorant is added to compensate for the deficiencies of cyan, magenta, and yellow colorants, and consequently color printing uses four process colors: Cyan, Magenta, Yellow, and blacK (CMYK). The use of black ink helps in producing rich solid blacks and also allows for improved rendition of black text. Print device gamut Different color reproduction techniques have different color capabilities, or gamuts. Color transparency films have comparatively large gamuts, as do color monitors. The color gamut that can be produced using CMYK toners on paper is smaller. This is why some colors that can be displayed on a color monitor, especially bright saturated colors, cannot be reproduced exactly by your print device­ nor, for that matter, can they be reproduced on press using process colors. Moreover, different print devices have different gamuts­some colors that your print device can produce cannot be reproduced on an offset press, and vice versa. The following illustration provides a graphical representation of this concept. Color Management Chapter 5 5-5 The Properties of Color Color transparency film RGB monitor Offset press (white) Other print device You need to account for the gamut of your print device when designing on a color monitor. 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