Why is there an inaccurate color - the application of spot colors (below)

X-Rite ColorShop Color Management Software

(1) Use a spectrophotometer to measure a spot color sample or color.

(2) The spectrophotometer can read the spectral spectral values ​​of spot colors.

(3) Different readings are calculated by the software.

(4) The software finds the closest spot color number in the spot color database.

(5) In the color gamut diagram of CIE x,y, this color is said to leave the color gamut range of four-color printing.

(6) Through the four-color ICC profile to find the closest CMYK dot combination, but because this spot color is out of the four color gamut, a warning signal â–³ appears, and shows the color difference value â–³E (Delta E).

GretagMacbeth's ColorPicker Color Management Software

Two color gaps

A spectrophotometer for measuring the color of a computer

Spectral densitometer for measuring spot colors

The term Delta E

Chinese translation for total color difference

For some spot colors, the above two methods may not find the appropriate four-color pairing, because there are many spot colors that are out of the color gamut range that can be represented by the four colors, so that only spot color printing can be used. Therefore, it is recommended that when selecting colors for customers, we must first know whether to use four-color or spot color printing, and then select the appropriate color to do.





Source: Greater China Graphic Arts

Author: Chung Jinrong About the Author: 2082 publication of "Graphic Design Handbook" has become the reference of design and production of books, in 2085 the development of Chinese fonts in computer applications, nine O System Co., Ltd. was established in Weishi, the current executive director.