現(xiàn)在大多數(shù)印刷平面設(shè)計(jì)都使用電腦進(jìn)行設(shè)計(jì)和制作。電腦的顯示器呈色出R（紅）、G（綠）、B（藍(lán)）色光三原色以色光加色法呈色，色域較大；而印刷呈色是由C（青）、M（品）、Y（黃）三原色和K（黑色）四種色料以色料減色法呈色，色域較小。可見(jiàn)電腦呈色與印刷呈色原理不同、色域不同。
Nowadays, most printing graphic designs are designed and produced by computers. The computer display shows three primary colors of R (red), G (green) and B (blue), and the color is shown by color light plus color method, with a large color gamut; The printing color is composed of three primary colors of C (green), m (product), y (yellow) and K (black), which are presented by the color subtraction method, and the color gamut is small. It can be seen that computer color rendering and printing color rendering have different principles and color gamut.
印刷類平面設(shè)計(jì)制作的終輸出目標(biāo)是進(jìn)行C、M、Y、K四色印刷，所以設(shè)計(jì)師應(yīng)在設(shè)計(jì)制作過(guò)程中以印刷色標(biāo)來(lái)定義、調(diào)整和控制顏色，唯有如此，作品的顏色外觀才會(huì)有保證。如果是對(duì)圖形和文字進(jìn)行著色處理，為了使印刷時(shí)有準(zhǔn)確的顏色外觀，須在印刷色標(biāo)冊(cè)上選定需要的顏色，并用其相應(yīng)的CMYK色值組合對(duì)圖文對(duì)象進(jìn)行設(shè)定。
The final output goal of printing graphic design and production is to carry out C, m, y and K four-color printing, so designers should define, adjust and control colors with printing color codes in the process of design and production. Only in this way can the color appearance of works be guaranteed. If you are coloring graphics and text, in order to have an accurate color appearance during printing, you must select the required color on the printing color code book and set the graphic object with its corresponding CMYK color value combination.
②原色與專色。這里所說(shuō)的原色是指C、M、Y、K及其疊印色，又叫印刷色；專色是指印刷前預(yù)先混合而成的特定色油墨，如珍珠藍(lán)、熒光黃等，它不是靠CMYK疊印出來(lái)的顏色。在設(shè)計(jì)時(shí)是用CMYK四色印刷還是專色印刷呢？
② Primary color and spot color. The primary colors mentioned here refer to C, m, y, K and their superimposed printing colors, also known as printing colors; Spot color refers to the specific color ink pre mixed before printing, such as pearl blue, fluorescent yellow, etc. it is not the color overprinted by CMYK. Is CMYK four-color printing or spot color printing used in the design?

一般情況下，我們盡量使用原色，避免使用專色，原因有兩個(gè)方面：一是四色印刷可以組合出大部分的任意色，從而給設(shè)計(jì)師本人提供的設(shè)計(jì)自由；二是專色油墨多為進(jìn)口油墨，高，在印刷時(shí)要專門制作一塊印版，單由一個(gè)機(jī)組走紙一次來(lái)完成該色的印刷，會(huì)大大增加印刷費(fèi)用。 可如果是簡(jiǎn)單的專色印刷，如報(bào)紙的套紅標(biāo)題等，其成本比四色印刷成本要低。
In general, we try our best to use primary colors and avoid spot colors for two reasons: first, four-color printing can combine most of any colors, so as to provide the designer with the greatest design freedom; Second, spot color inks are mostly imported inks with high prices. During printing, a printing plate should be specially made. Only one unit takes the paper once to complete the printing of this color, which will greatly increase the printing cost. But if it is a simple spot color printing, such as the red cover headline of a newspaper, its cost is lower than that of four-color printing.
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