Color box packaging design in what is the printing color

A: What is the printing color?

A: Printing color is composed of different C (cyan), M (magenta), Y (yellow) and K (black) percentage of the color, so it is more reasonable to call the mixture of color. C, M, Y, K is the general selection of the printing of the four primary colors. In printing, these four colors have their own color plate, the color plate on the record of the color of the dot, the four color plate together to form the definition of the original color. In fact, in the paper above the four printing color dots are separated, only very close to each other, due to the limited ability of our eyes to distinguish, so we can not distinguish. We get the visual image is a variety of color mixing effect, so a variety of different primary colors. y, M, C can be composed of virtually all colors, but also need black, because through the y, M, C black is not pure, in the printing of the need for more pure black. Printing electronic files used must be four-color files (i.e., C, M, Y, K), RGB color form of the file can not be used for printing output.

Second: What is the meaning of color separation? Color separation is so important? How to color separation in Photoshop?

A: color separation is a professional term for printing, refers to the original manuscript of the various colors broken down into yellow, magenta, cyan, black, four primary colors; in the computer printing planning or graphic planning graphics software, color separation work is the scanning of drawings or other sources of drawings of the color of the form of the change to CMYK form.

The color separation work in computer printing planning or graphic planning software is to change the color form of scanned pictures or other pictures to CMYK form. General scanning pictures for the RGB form, with a digital camera pictures for the RGB form, download pictures from the Internet is also mostly RGB color form. If you want to print, it is necessary to color separation, red and yellow, magenta, cyan, black four colors, which is a requirement for printing. If the picture color form of RGB or Lab, the output may be as long as the K version of the dot, that is, the RIP interpretation of the picture color information is only interpreted as gray.

? In Photoshop, color separation operation is actually very simple: only need to change the color form of the picture from RGB form or Lab form to CMYK form can be. So that the color of the picture is indicated by the color pigment (ink), with 4 color channels. Picture in the output film will be generated according to the color of the channel data network points, and divided into red and yellow, magenta, cyan, black, four color film sheet.

Third: in the color separation, when the picture by RGB to CMYK, the naked eye can see some colors on the screen will change significantly, what is the reason for this? What is the impact on the color of the picture?

A: In the picture by the RGB color form to CMYK color form, the picture of some of the bright colors will be significant changes, this change is sometimes very obvious to investigate, generally by the bright colors into some of the darker colors. This is due to the RGB color gamut than the CMYK color gamut, that is to say, some of the colors in the RGB color form can indicate the color in the transfer to CMYK, beyond the CMYK can express the color scale, these colors can only be used in the vicinity of the color instead. Therefore, these colors have changed more significantly. In the manufacture of electronic documents for printing, it is advocated that the beginning of the document settings that is the CMYK form, to prevent the use of RGB color form, to avoid the formation of color errors in the separation of color transformation.