How to solve the problem of computer color and printing color inconsistency

1, most of the color image from digital acquisition equipment, so the majority of color mode RGB mainly, and printing (printing) is C/cyan, m/, y/yellow, k/black ink (ink) to achieve color.

2, RGB and CMYK is the device-related color mode.

Computer monitor is RGB three primary colors of light performance color, different manufacturers and models of equipment color characteristics, making the same image file on the visual produce different color results

printing (printing) is a CMYK four-color ink to represent color. Different printing materials and printing control conditions, will also cause the same image file with a set of CMYK data printing a different visual color.

3, the digital image before printing, the RGB data must be converted to CMYK data.

This conversion can be converted during design processing, or in the process of Seihan before printing.

Must be aimed at the printing process conditions (Seihan control, printing presses control, Seihan printing materials, such as color data transfer characteristics) to achieve accurate color reproduction. (What you see is what you receive)

On the premise of not changing the computer, we recommend:

First, the system with the adjustment module to the computer screen for basic calibration.

To achieve two basic points: neutral color (lime black) color, gradient changes normal (from the brightest to the darkest rung can be seen).

Second, the use of Photoshop for Rgb->cmyk mode conversion and the need to print the picture color:

1. Start Photoshop, click "Color Settings" under the main Menu "edit" bar, and go to the Settings page.

2, the proposal according to the following chart set:

RGB settings are applicable to the widest range of civilian monitors and the Internet standard display space.

3, CMYK workspace settings, can be the following figure:

Description

Because most of the domestic printing plant use of equipment materials and printing control concepts are derived from the Japanese standards, so in the cooperation of the printing plant color conversion data, the use of Japan's characteristic curve relatively reliable. There are five sets of data available at the beginning of Japan.

Five sets of data subdivided paper and printing control, can be based on the actual situation to choose:

Coated, coated, refers to the type of paper, we usually refer to the bond is this category.

Uncoated, uncoated, usually printed on the pages of offset paper belongs.

Newspaper, newsprint.

Web, refers to the printing method used in the rotary offset printing press.

AD, advertising category, refers to the advertising needs of color control.

4. Further accurate color conversion

If you can know the cooperative printing plant more specific control data, you can select the CMYK workspace "Custom CMYK ..."

Here can be based on the ink to do further control. Toyo ink and Dainippon ink is the domestic use of more Japanese ink series, Toyo ink and its same color will be more.

The following figure is a complete custom setting, suitable for a printing plant with a better control level.

Emphasize again:

The above CMYK space conversion settings are for reference only, will improve the reduction of screen display and print color differences. However, the accurate conversion must be based on the actual characteristics of the printing plant data set and combined with the adjustment of halftoning and color balance adjustment to achieve.

5, indicating the color of printing

If you want the final actual conversion to be completed by the cooperative printing factory, it is recommended that the following figure, check "proof color" ("Proof set" check "CMYK"), you can see the RGB conversion to CMYK color effects (differences).

If you want to directly complete the conversion and delivery of printing, the following figure operation, select the CMYK mode. It is recommended to save the converted file, saving the original RGB mode file.

Color control of other design and production software

In fact, commonly used graphic design software, such as AI,ID,FW (this SA and PS for Adobe Production), CDR have similar color preset, but also to achieve the same color prediction and conversion function, only control no PS clear, interference factors more complex, here no longer repeat.