CN110780827A - Seven-primary-color high-fidelity flexible printing method - Google Patents

Seven-primary-color high-fidelity flexible printing method Download PDF

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Publication number
CN110780827A
CN110780827A CN201910979569.XA CN201910979569A CN110780827A CN 110780827 A CN110780827 A CN 110780827A CN 201910979569 A CN201910979569 A CN 201910979569A CN 110780827 A CN110780827 A CN 110780827A
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color
primary
colors
printing
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CN110780827B (en
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刘祖斌
陆亚英
谭荣洪
肖小清
陈锦彬
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Rong Printing Group Ltd By Share Ltd
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Rong Printing Group Ltd By Share Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201Dedicated interfaces to print systems
    • G06F3/1202Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1203Improving or facilitating administration, e.g. print management
    • G06F3/1208Improving or facilitating administration, e.g. print management resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201Dedicated interfaces to print systems
    • G06F3/1223Dedicated interfaces to print systems specifically adapted to use a particular technique
    • G06F3/1237Print job management
    • G06F3/1242Image or content composition onto a page
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30Computing systems specially adapted for manufacturing

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  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Printing Methods (AREA)

Abstract

The invention discloses a seven-primary-color high-fidelity flexible printing method, which comprises the following steps: a. preparing spot color ink; b. generating a CXF file corresponding to each Pantong special color; c. forming a source target spectrum database; d. generating a seven-primary color gamut table; e. printing a seven-primary color gamut table sample sheet; f. generating a high-fidelity characteristic file; g. establishing a conversion curve library; h. and (7) printing the product. The method obtains a conversion curve required by converting color blocks in a seven-primary color gamut sheet into target colors according to the target colors of printed products, combines a conversion relation between the color blocks in a high-fidelity characteristic file and the seven primary colors, obtains a preparation proportion and a preparation logic of the target colors mixed by the seven primary colors, further realizes that the target colors containing different Pantong special colors can be flexo-printed by only utilizing the seven primary colors, avoids the need of configuring the special colors before each printing, greatly improves the printing efficiency, and can ensure the color uniformity of the output products.

Description

Seven-primary-color high-fidelity flexible printing method
Technical Field
The invention relates to a seven-primary-color high-fidelity flexography method.
Background
The Pantone color card is an international universal standard color card, is a color authority which is in the reputation of the world, covers color communication systems in the fields of printing, textile, plastic, drawing, digital science and technology and the like, and becomes an international unified standard language for exchanging color information at present.
The Pantone color card has 1876 spot colors, each spot color is mixed by at least one base ink, in the printing production, the color required by the printed matter may contain multiple spot colors, before the flexo printing, all the spot colors contained in the printed matter need to be modulated, and then the printing is carried out by a flexo printing equipment machine, so that the occupied time proportion and the workload proportion of the preorder work of the printing are very large, the printing efficiency of the product is seriously influenced, for the printed matter with less printing total amount, the printing cost is very high, and the uniformity of the color matching effect of the printed matters in different batches cannot be ensured.
The Pantong color card is a color card printed in an offset printing mode, each color card is provided with a mixed formula and related characteristic data, if the number of printed matters required by a customer is huge, the printing cost can be greatly reduced in a flexo printing mode, if the number of the printed matters required by the customer is small, the printing workload and cost can be reduced in a digital printing mode, the color mixing and characteristic data of products printed in the flexo printing mode and the digital printing mode are different from the offset printing mode, in the existing flexo printing method, the color similar to the printed products can be obtained only through multiple debugging according to experience, and the color stability of the printed products cannot be guaranteed.
Moreover, the color blocks on each pantone color card are solid color blocks (i.e., color blocks with a color gradient of 100%), and in the process of printing production, color blocks with a color gradient of 0-100% are often used for color mixing, which increases the workload of workers unnecessarily and is not beneficial to mass production.
Aiming at the problems, the invention provides a high-fidelity soft printing method which can mix 1876 pantone special colors by using CMYKOGB (Cyan, Magenta, Yellow, Black, Orange, Green and Blue) seven primary colors and automatically prepare the required pantone special colors to form the target color of a printed matter.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a seven-primary-color high-fidelity flexo printing method, the target color of a printed matter can be formed by using the seven primary colors of CMYKOGB to replace pantone special color, the need of configuring special color before each printing is avoided, the printing efficiency is greatly improved, and the color uniformity of output products can be ensured.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a seven-primary-color high-fidelity flexography method comprises the following steps:
a. preparing spot color ink, and preparing corresponding spot color ink according to the formula of each Pantong spot color;
b. b, generating a CXF file corresponding to each pantone special color, printing the special color ink obtained in the step a into a color gradient table corresponding to the special color ink and a superposed gradient table obtained by superposing the color gradient table and the black stripes by using a flexo printing device, and forming the CXF file corresponding to the pantone special color by the superposed gradient table and the color gradient table;
c. forming a source target spectrum database, scanning CXF files corresponding to all the pantone special colors in sequence by using a spectrometer to obtain spectral data corresponding to all the pantone special colors, and forming the source target spectrum database by the spectral data of all the pantone special colors;
d. generating a seven-primary-color gamut table, extracting CXF files corresponding to Cyan, Magenta, Yellow, Black, Orange, Green and Blue in the step b, inputting the CXF files of the seven primary colors into CGS ORIS Xgnamt software, forming the seven-primary-color gamut table by randomly combining color blocks in the CXF files corresponding to the seven primary colors, covering all pantone special colors in the step b by the seven-primary-color gamut table, and outputting the seven-primary-color gamut table as an electronic file;
e. printing a seven-primary color gamut table sample sheet, inputting an electronic file of the seven-primary color gamut table into flexo printing equipment, and printing the seven-primary color gamut table sample sheet of the flexo printing plate;
f. generating a high-fidelity characteristic file, and scanning the seven-primary color gamut table sample by using a spectrometer to obtain spectral data corresponding to each color block in the seven-primary color gamut table sample, wherein the spectral data corresponding to all the color blocks in the seven-primary color gamut table sample form the high-fidelity characteristic file together;
g. establishing a conversion curve library, using CGS ORIS XDamt software to match the high-fidelity characteristic file with a source target spectrum database, so that a conversion relation is established between any pantone special color in the source target spectrum database and at least one color block in the high-fidelity characteristic file, further obtaining conversion curves required by converting each color block in the high-fidelity characteristic file into corresponding pantone special color, and forming the conversion curve library by all the conversion curves.
h. And printing a product, scanning by using a spectrometer to obtain spectral data of a target color to be printed, comparing the spectral data of the target color with the high-fidelity characteristic file to obtain more than one conversion curve in the conversion curve library, and combining a conversion relation between a color block in the high-fidelity characteristic file and seven primary colors to obtain a preparation proportion and a preparation logic of the target color by mixing the seven primary colors.
In the embodiment of the present invention, the seven-primary color gamut table includes 2116 color blocks, and the 2116 color blocks contain 1876 pantone spot colors.
In some embodiments of the present invention, step h is followed by step I, which comprises: the method comprises the steps of manufacturing a resin plate, preparing ink and a printing stock, laying the printing stock on the resin plate, transferring the ink to the resin plate for printing according to the preparation proportion and the preparation logic of a target color through a flexible printing device, and drying and flattening the printed product to form a printed finished product.
In some embodiments of the present invention, step I is followed by step J: and cutting the printed finished product, and packaging the cut printed finished product.
The method has the advantages that the CXF files corresponding to all the pantone special colors are firstly formed, then the source target spectrum database consisting of the spectral data of all the pantone special colors is obtained through the scanning of the spectrograph, the seven-primary-color gamut table is generated in CGS ORIS XCamt software by utilizing the CXF files of the seven primary colors, then the seven-primary-color gamut table is printed out through the flexo printing equipment, the high-fidelity characteristic file corresponding to the seven-primary-color gamut table sample is obtained through the scanning of the spectrograph again, the matching relation is established between the high-fidelity characteristic file and the source target spectrum database to obtain the conversion curve required by converting the color blocks in the seven-primary-color gamut table sample into the corresponding pantone special colors and form a conversion curve library, the conversion curve required by converting the color blocks in the seven-primary-color gamut table sample into the target colors is obtained according to the target colors of printed products, and the conversion relation between the color blocks in the high-fidelity characteristic file and the seven primary colors, the method has the advantages that the preparation proportion and the preparation logic of the target color mixed by the seven primary colors are obtained, the target color containing different Pantong special colors can be flexibly printed by only utilizing the seven primary colors, the special color is prevented from being required to be configured before each printing, the printing efficiency is greatly improved, and the color uniformity of an output product can be guaranteed.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of CXF files corresponding to seven primary colors, Cyan, Magenta, Yellow, Black, Orange, Green, and Blue, respectively;
FIG. 2 is a first color patch table;
FIG. 3 is a second color patch table;
fig. 4 is a third color block table.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
Referring to fig. 1 to 4, a seven-primary-color high fidelity flexography method includes the following steps:
a. preparing spot color ink, and preparing corresponding spot color ink according to the formula of each Pantong spot color;
b. generating a CXF file 10 corresponding to each pantone special color, printing the special color ink obtained in the step a into a color gradient table 11 corresponding to the special color ink and a superposed gradient table 12 formed by superposing the color gradient table 11 and black stripes by using a flexo printing device, and forming the CXF file 10 corresponding to the pantone special color by the superposed gradient table 12 and the color gradient table 11; as shown in fig. 1, the color gradient table 11 of any one of the seven primary colors (Cyan, Magenta, Yellow, Black, Orange, Green, and Blue) has color blocks with color gradients between 0% and 100%, so as to form a color gamut table with a more comprehensive color range, and the color gradient table 11 and the superposition gradient table 12 contain all spectral data of the pantone spot color.
c. Forming a source target spectrum database, scanning the CXF files 10 corresponding to all the pantone special colors in sequence by using a spectrometer to obtain spectral data corresponding to all the pantone special colors, wherein the spectral data comprise parameters such as L, a, b, c and h in the pantone special colors, and the spectral data of all the pantone special colors form the source target spectrum database;
d. generating a seven-primary-color gamut table, extracting CXF files 10 corresponding to Cyan, Magenta, Yellow, Black, Orange, Green and Blue in the step b, inputting the CXF files 10 of the seven primary colors into CGS ORIS XCamt software (color management software), and forming the seven-primary-color gamut table by randomly combining color blocks in the CXF files 10 corresponding to the seven primary colors, wherein the seven-primary-color gamut table covers all pantone special colors in the step b, and then outputting the seven-primary-color gamut table as an electronic file, wherein the electronic file is a PDF electronic file; in the embodiment of the present invention, the seven-color gamut table includes 2116 color blocks, the 2116 color blocks include 1876 pantone spot colors, the seven-color gamut table is composed of the first color block table 21, the second color block table 22, and the third color block table 23 in fig. 2 to 4, and each of the first color block table 21, the second color block table 22, and the third color block table 23 includes a plurality of color blocks.
e. Printing a seven-primary color gamut table sample sheet, inputting an electronic file of the seven-primary color gamut table into flexo printing equipment, and printing the seven-primary color gamut table sample sheet of the flexo printing plate;
f. generating a high-fidelity characteristic file, and scanning the seven-primary color gamut table sample by using a spectrometer to obtain spectral data corresponding to each color block in the seven-primary color gamut table sample, wherein the spectral data corresponding to all the color blocks in the seven-primary color gamut table sample form the high-fidelity characteristic file together;
g. establishing a conversion curve library, using CGS ORIS XDamt software to match the high-fidelity characteristic file with a source target spectrum database, so that a conversion relation is established between any pantone special color in the source target spectrum database and at least one color block in the high-fidelity characteristic file, further obtaining conversion curves required by converting each color block in the high-fidelity characteristic file into corresponding pantone special color, and forming the conversion curve library by all the conversion curves.
h. And printing a product, scanning by using a spectrometer to obtain spectral data of a target color to be printed, comparing the spectral data of the target color with the high-fidelity characteristic file to obtain more than one conversion curve in the conversion curve library, and combining a conversion relation between a color block in the high-fidelity characteristic file and seven primary colors to obtain a preparation proportion and a preparation logic of the target color by mixing the seven primary colors.
The seven-primary color-based high-fidelity flexography method firstly forms CXF files 10 corresponding to all pantone special colors, then obtains a source target spectrum database consisting of spectral data of all pantone special colors through the scanning of a spectrometer, utilizes the CXF files 10 of the seven primary colors to generate seven-primary color gamut tables shown in figures 2, 3 and 4 in CGS ORIS Xgmamt software, then prints the seven-primary color gamut tables by utilizing flexography equipment, obtains a high-fidelity characteristic file corresponding to a sample sheet of the seven-primary color gamut tables through the scanning of the spectrometer, establishes a matching relationship between the high-fidelity characteristic file and the source target spectrum database to obtain a conversion curve required by converting color blocks in the sample sheet of the seven-primary color gamut tables into corresponding pantone special colors and form a conversion curve database, obtains a conversion curve required by converting the color blocks in the sample sheet of the seven-primary color gamut tables into target colors according to the target colors of printed products, the conversion relation between the color blocks and the seven primary colors in the high-fidelity characteristic file is combined, so that the preparation proportion and the preparation logic of the target color mixed by the seven primary colors are obtained, the target color containing different Pantong special colors can be flexibly printed by only utilizing the seven primary colors, the special color is prevented from being required to be configured before each printing, the printing efficiency is greatly improved, and the color uniformity of output products can be ensured.
In some embodiments of the present invention, step h is followed by step I, which comprises: the method comprises the steps of manufacturing a resin plate, preparing ink and a printing stock, laying the printing stock on the resin plate, transferring the ink to the resin plate for printing according to the preparation proportion and the preparation logic of target colors through flexible printing equipment, and drying and flattening the printed product to form a printed finished product. Wherein, the resin plate making part comprises typesetting and imposition of the image-text information.
In some embodiments of the present invention, step I is followed by step J: and cutting the printed finished product, and packaging the cut printed finished product, thereby realizing the integrated production of the flexible printed product.
The above examples are merely preferred embodiments of the present invention, and other embodiments of the present invention are possible, such as a reasonable combination of the technical solutions described in the examples. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope set forth in the claims of the present application.

Claims (4)

1. A seven-primary-color high-fidelity flexible printing method is characterized by comprising the following steps:
a. preparing spot color ink, and preparing corresponding spot color ink according to the formula of each Pantong spot color;
b. generating a CXF file (10) corresponding to each pantone special color, printing the special color ink obtained in the step a into a color gradient table (11) corresponding to the special color ink and a superposed gradient table (12) formed by superposing the color gradient table (11) and black stripes by using a flexo printing device, and forming the CXF file (10) corresponding to the pantone special color by using the superposed gradient table (12) and the color gradient table (11);
c. forming a source target spectrum database, scanning the CXF files (10) corresponding to all the pantone special colors in sequence by using a spectrometer to obtain spectral data corresponding to all the pantone special colors, and forming the source target spectrum database by the spectral data of all the pantone special colors;
d. generating a seven-primary-color gamut table, extracting CXF files (10) corresponding to Cyan, Magenta, Yellow, Black, Orange, Green and Blue in the step b, inputting the CXF files (10) of the seven primary colors into CGS ORIS XDamt software, and forming the seven-primary-color gamut table by randomly combining color blocks in the CXF files (10) corresponding to the seven primary colors, wherein the seven-primary-color gamut table covers all pantone special colors in the step b, and then outputting the seven-primary-color gamut table as an electronic file;
e. printing a seven-primary color gamut table sample sheet, inputting an electronic file of the seven-primary color gamut table into flexo printing equipment, and printing the seven-primary color gamut table sample sheet of the flexo printing plate;
f. generating a high-fidelity characteristic file, and scanning the seven-primary color gamut table sample by using a spectrometer to obtain spectral data corresponding to each color block in the seven-primary color gamut table sample, wherein the spectral data corresponding to all the color blocks in the seven-primary color gamut table sample form the high-fidelity characteristic file together;
g. establishing a conversion curve library, using CGS ORIS XDamt software to match the high-fidelity characteristic file with a source target spectrum database, so that a conversion relation is established between any pantone special color in the source target spectrum database and at least one color block in the high-fidelity characteristic file, further obtaining conversion curves required by converting each color block in the high-fidelity characteristic file into corresponding pantone special color, and forming the conversion curve library by all the conversion curves.
h. And printing a product, scanning by using a spectrometer to obtain spectral data of a target color to be printed, comparing the spectral data of the target color with the high-fidelity characteristic file to obtain more than one conversion curve in the conversion curve library, and combining a conversion relation between a color block in the high-fidelity characteristic file and seven primary colors to obtain a preparation proportion and a preparation logic of the target color by mixing the seven primary colors.
2. The seven-primary-color high-fidelity flexography method according to claim 1, wherein:
the seven-primary color gamut table comprises 2116 color blocks, and the 2116 color blocks comprise 1876 pantone special colors.
3. The seven-primary-color high-fidelity flexography method according to claim 1, wherein:
step h is followed by step I, comprising: the method comprises the steps of manufacturing a resin plate, preparing ink and a printing stock, laying the printing stock on the resin plate, transferring the ink to the resin plate for printing according to the preparation proportion and the preparation logic of target colors through flexible printing equipment, and drying and flattening the printed product to form a printed finished product.
4. The seven-primary-color high-fidelity flexography method according to claim 3, wherein:
step I is followed by step J: and cutting the printed finished product, and packaging the cut printed finished product.
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CN113858799A (en) * 2021-10-19 2021-12-31 深圳汉华工业数码设备有限公司 Printing method, color card database acquisition method and printing equipment

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