印刷就是使用印版或其它方式將原稿上的圖文信息轉移到承印物上的工藝技術。印刷，其實就是一個顏色合成的過程。將黃色、品紅、青色、黑色四種網點疊加到一張紙上，形成彩色圖案。
Printing is the use of plates or other means to transfer thegraphic information on the original to the substrate by technology. Printing, in fact, is a color synthesis process. The yellow, magenta, cyan, black four kinds of dots superimposed on a piece of paper, forming a color pattern.
常見的幾種顏色印刷包括CMYK、專色和RGB。
Several common color printing include CMYK, Spot color and RGB.
CMYK也稱作印刷色彩模式，與RGB相反，CMYK是一種減色模式，是一種依靠反光的色彩模式。
Different from RGB, CMYK is a subtractive color mode that relies on reflective color modes.
CMY是3種印刷油墨名稱的首字母：青色Cyan、品紅色Magenta、黃色Yellow。而K取的是black最后一個字母，之所以不取首字母，是為了避免與藍色(Blue)混淆。
CMY is the first letter of the three printing ink names: Cyan,Magenta, Yellow. In order to avoid confusion with the Blue, K took the black last letter.
CMYK是四色打印和印刷的基礎，因此我們在最終輸出作品時，都應該將圖象轉成CMYK模式。
It is the basis of four-color printing, so when we finally output the work, we would turn the image into CMYK mode.
專色是指在印刷時，不是通過印刷C，M，Y，K四色合成這種顏色，而是專門用一種特定的油墨來印刷該顏色。
Spot color refers to the printing, not by printing C, M, Y, K four-color synthesis of this color, but with a special ink to print the color.
RGB色彩模式是工業(yè)界的一種顏色標準，是通過對紅(R)、綠(G)、藍(B)三個顏色通道的變化以及它們相互之間的疊加來得到各式各樣的顏色的。
Color mode is a color standard in the industry, which is obtained by the change of the three color channels of red (R), green (G) and blue (B) and their superposition with each other to get a variety of colors.
RGB即是代表紅、綠、藍三個通道的顏色，這個標準幾乎包括了人類視力所能感知的所有顏色，是目前運用最廣的顏色系統(tǒng)之一。
RGB is the color that represents the red, green and blue channels. This standard includes almost all the colors that human eyesight can perceive, is one of the most widely used color systems.
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