A printing spot color matching method based on absorption spectrum

It is a technology of absorption spectrum and base color, which is applied in printing, printing machine, color/spectral characteristic measurement, etc. It can solve the problems of inaccurate color matching ratio, large influence of subjective factors, and long deployment time, so as to improve color matching accuracy, reduce waste, The effect of reducing waste

Active Publication Date: 2019-11-22
XIAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

Color matching personnel are required to deploy spot color inks based on their experience. Subjective factors have a great influence, the color matching ratio is not accurate enough, the color difference between different batches of the same color is large, the deployment time is long, and material waste is large.

Method used

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  • A printing spot color matching method based on absorption spectrum
  • A printing spot color matching method based on absorption spectrum
  • A printing spot color matching method based on absorption spectrum

Examples

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Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] The invention provides a printing spot color matching method based on absorption spectrum, the process of which is as follows figure 1 As shown, follow the steps below to implement:

[0067] Step 1, select a white printing material as the printing substrate of the primary color ink for the standardization of the primary color ink;

[0068] Step 2, primary color ink standardization:

[0069] Standardization of primary color inks is to calibrate and convert primary color inks into primary color inks for formula calculation and color matching. The specific method of primary color ink standardization is:

[0070] Dilute the n kinds of primary color inks and diluents according to a certain ratio, print out the color sample ladder of different dilution rates of the primary color inks on the printing material selected in step 1, and measure...

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Abstract

The invention discloses an absorption spectrum-based special printing color matching method. The method specifically comprises the following steps: calibrating primary color ink on a printing base, and obtaining n types of base color ink for color matching; then printing the n types of base color ink on a black-white printing material, and respectively measuring the spectral reflectivity of the black-white printing material and the spectral reflectivities of on-site color pieces of the n types of base color ink under the black-white printing base, thus obtaining 2n+2 groups of spectral reflectivities; calculating the spectral reflectivities and the spectral transmissivities of the n types of base color ink by using the obtained spectral reflectivities; and building a color matching model of the spectral reflectivity of the base color ink and the spectral reflectivity of a target special color, thus obtaining optimal ratios of all types of primary color ink for color matching. Accordingto the absorption spectrum-based special printing color matching method, by the use of reflection spectrums to calculate absorption spectrums, color matching of special-color ink for intaglio printing is carried out through a computer. By the method, the influence of difference of the primary color ink on a color matching hue is reduced; and the color matching color range is expanded, the color matching time is shortened, and the color matching precision is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of printing and color matching, and relates to a printing spot color matching method based on absorption spectrum. Background technique [0002] The color reproduction of printed matter is usually achieved by register printing, that is, after the original is color-separated, the cyan yellow-black (CMYK) monochrome printing plates with different screen lines are used to overlap and print in sequence according to the color sequence of the printing plates, so as to obtain the same level and tone as the original. of prints. Spot color printing is different from register printing. It prepares the colors to be printed before printing, and then directly prints graphic information with a single plate. Spot color printing is a commonly used printing method in gravure printing, which can meet the requirements of gravure printing for color saturation and color accuracy. Spot color printing mostly uses large solid col...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/00G01N21/31
CPCB41F33/00G01N21/31
Inventor 周世生张研
Owner XIAN UNIV OF TECH
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