Printing ink colour matching system and method

A technology of ink and color matching, which is applied in the field of ink color matching system based on complex spectrum light and color transformation theory, can solve the problem of low accuracy of ink color matching, achieve the effect of improving convenience and flexibility, improving accuracy and reducing cost

Active Publication Date: 2011-04-20
中国印刷科学技术研究所 +1
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Problems solved by technology

[0006] The invention provides an ink color matching system and method, which are used to solve the defect that the accuracy of ink color matching is low wh

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  • Printing ink colour matching system and method
  • Printing ink colour matching system and method
  • Printing ink colour matching system and method

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[0020] First, the meaning and calculation method of the main parameters describing the color involved in the present invention will be explained. For visual intuition and convenience in calculation, the complex spectrum chromaticity diagram is drawn by combining polar coordinates and rectangular coordinates. Among them, the X-axis and Y-axis of the rectangular coordinate system not only represent the relative distribution of the spectral power of the light source, but also represent the spectral reflectance factor and the percentage of spectral transmittance; in polar coordinates, the length r represents the vector of the color light complex amplitude (that is, color intensity). The length of the diameter, the angle θ is 0-360 degrees, is the hue of the color, which represents the position of the color in polar coordinates. One of the keys is to correspond the visible light wavelength range of 390nm-780nm to the circle of 360 degrees.

[0021] According to the complex spectrum ch...

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Abstract

The invention relates to a printing ink colour matching system and method. The system comprises a core database, a converted colour printing ink colour matching processing module and a formula result output module, wherein the core database is used for storing hue, brightness and saturation of single colour base colour printing ink, hue, brightness and saturation of secondary colour PQ formed by blending base colour printing ink in different percentage contents as well as hue, brightness and saturation of secondary colour PQ with different percentage contents of white ink and black ink; the converted colour printing ink colour matching processing module is used for calculating initial hue, initial brightness and initial saturation of secondary colour when the converted colour printing ink is utilized to blend target colour; and the formula result output module is used for determining percentage content and hue shift of white ink and/or black ink required to be added actually in brightness and saturation adjustment and outputting printing ink formula result when hue shift is in tolerance range, otherwise hue of target colour is corrected and calculation is repeated. By using the invention, the accuracy of printing ink colour matching is improved.

Description

technical field [0001] The invention relates to printing ink color matching technology, in particular to an ink color matching system and method based on complex spectrum light color conversion theory. Background technique [0002] At present, in the field of light and color, whether it is color light technology such as computer display and lighting, or color material technology such as printing, photography, and paint, the theoretical basis is mainly CIE chromaticity theory. The CIE theory is based on the "standard chromaticity observer XYZ tristimulus value", which cannot reflect the spectral characteristics of "color light" in the entire visible spectrum band, and there are problems such as color balance and color difference calculation. Therefore, there are deficiencies in the application in various fields. [0003] In order to overcome the defect of CIE chromaticity theory, the inventors of the present invention, Pang Duoyi and Pang Yechi, proposed a brand-new complex ...

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Application Information

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IPC IPC(8): B41F33/00G01J3/46
Inventor 庞也驰李志杰庞多益陈彦褚庭亮
Owner 中国印刷科学技术研究所
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