CN110780828A - Seven-primary-color high-fidelity digital printing method - Google Patents
Seven-primary-color high-fidelity digital printing method Download PDFInfo
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- CN110780828A CN110780828A CN201910979570.2A CN201910979570A CN110780828A CN 110780828 A CN110780828 A CN 110780828A CN 201910979570 A CN201910979570 A CN 201910979570A CN 110780828 A CN110780828 A CN 110780828A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1203—Improving or facilitating administration, e.g. print management
- G06F3/1208—Improving or facilitating administration, e.g. print management resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1242—Image or content composition onto a page
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- Y—GENERAL 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a seven-primary-color high-fidelity digital printing method, which comprises the following steps of: 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 digitally 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
Technical Field
The invention relates to a seven-primary-color high-fidelity digital printing 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 printing, all the spot colors contained in the printed matter need to be modulated, then the printed matter is printed by a digital printing device, so that the time proportion occupied by the preorder work of printing and the proportion of workload are very large, the efficiency of product printing is seriously influenced, for the printed matter with less total amount, the printing cost is very high, and the uniformity of color matching effects 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 prior digital 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 ensured.
Secondly, the color blocks on each pantone color card are solid color blocks (namely, the color blocks with the color gradient of 100%), and in the process of printing production, the color blocks with the color gradient of 0-100% are often required to be used for color mixing, so that the workload of workers is increased unnecessarily, and the mass production is not facilitated.
Aiming at the problems, the invention provides a high-fidelity digital 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 mix various 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 digital printing method, the seven primary colors of CMYKOGB can be used for replacing a pantone special color to form a target color of a printed matter, a special color needs to be configured before each printing, the printing efficiency is greatly improved, and the color uniformity of an output product can be ensured.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a seven-primary-color high-fidelity digital printing 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. 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 digital 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 digital printing equipment, and printing the seven-primary color gamut table sample sheet of the digital 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: preparing ink, paper and auxiliary materials, carrying out ink jet printing, and carrying out post-treatment on the paper subjected to ink jet printing.
In some embodiments of the invention, the post-processing comprises: primary drying, steaming, water washing and secondary drying.
In some embodiments of the present invention, step I is followed by step J: and (4) cutting the printed finished product after the post-treatment, and then packaging the printed finished product after the cutting treatment.
The seven-primary color high-fidelity digital printing method has the advantages that CXF files corresponding to all the pantone special colors are firstly formed, then a source target spectrum database consisting of spectral data of all the pantone special colors is obtained through scanning of a spectrometer, a seven-primary color gamut table is generated in CGS ORIS Xgmamt software by using the CXF files of the seven primary colors, then the seven-primary color gamut table is printed out through digital printing equipment, a high-fidelity characteristic file corresponding to a sample sheet of the seven-primary color gamut table is obtained through scanning of the spectrometer again, a matching relation is established 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 table into corresponding pantone special colors and form a conversion curve library, and a conversion curve required by converting the color blocks in the sample sheet of the seven-primary color gamut table into target colors is obtained 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 digitally 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.
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 digital printing 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 digital printing equipment, 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, a color gradient table 11 of any one of seven primary colors (Cyan, Magenta, Yellow, Black, Orange, Green and Blue) has a color block with a color gradient of 0-100%, and all spectral data of the pantone spot color are contained in the color gradient table 11 and the superposition gradient table 12.
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), forming the seven-primary-color gamut table by randomly combining color blocks in the CXF files 10 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; 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 digital printing equipment, and printing the seven-primary color gamut table sample sheet of the digital 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 high-fidelity digital printing method firstly forms CXF files 10 corresponding to all the pantone special colors, then obtains a source target spectrum database consisting of spectral data of all the pantone special colors by scanning through a spectrometer, utilizes the CXF files 10 of the seven primary colors to generate a seven-primary color gamut table in CGS ORIS Xgmamt software, then prints the seven-primary color gamut table by using digital printing equipment, uses the spectrometer to scan again to obtain a high-fidelity characteristic file corresponding to a sample sheet of the seven-primary color gamut table, establishes a matching relation 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 table into corresponding pantone special colors and form a conversion curve library, obtains a conversion curve required by converting the color blocks in the sample sheet of the seven-primary color gamut table into target colors according to the target colors of printed products, combines 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 digitally 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.
In some embodiments of the present invention, step h is followed by step I, which comprises: preparing ink, paper and auxiliary materials, carrying out ink jet printing, and carrying out post-treatment on the paper subjected to ink jet printing.
In some embodiments of the invention, the post-processing comprises: primary drying, steaming, water washing and secondary drying. The printed paper after the post-treatment forms a printed finished product, and the printed finished product has clear pictures and texts and higher stability.
In some embodiments of the present invention, step I is followed by step J: and cutting the printed finished product after the post-treatment, and packaging the printed finished product after the cutting treatment, thereby realizing the integrated production of the digital 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 (5)
1. A seven-primary-color high-fidelity digital 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 digital printing equipment, 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 digital printing equipment, and printing the seven-primary color gamut table sample sheet of the digital 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 digital printing method according to claim 1, characterized in that:
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 digital printing method according to claim 1, characterized in that:
step h is followed by step I, comprising: preparing ink, paper and auxiliary materials, carrying out ink jet printing, and carrying out post-treatment on the paper subjected to ink jet printing.
4. The seven-primary-color high-fidelity digital printing method according to claim 3, characterized in that:
the post-processing comprises: primary drying, steaming, water washing and secondary drying.
5. The seven-primary-color high-fidelity digital printing method according to claim 3 or 4, characterized in that:
step I is followed by step J: and (4) cutting the printed finished product after the post-treatment, and then packaging the printed finished product after the cutting treatment.
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