CN117863749A - Color management method, device and storage medium for digital ink-jet printing - Google Patents
Color management method, device and storage medium for digital ink-jet printing Download PDFInfo
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- CN117863749A CN117863749A CN202211300062.5A CN202211300062A CN117863749A CN 117863749 A CN117863749 A CN 117863749A CN 202211300062 A CN202211300062 A CN 202211300062A CN 117863749 A CN117863749 A CN 117863749A
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- 238000007641 inkjet printing Methods 0.000 title claims abstract description 37
- 238000007726 management method Methods 0.000 title claims abstract description 26
- 238000003860 storage Methods 0.000 title claims abstract description 9
- 238000007639 printing Methods 0.000 claims abstract description 63
- 229910052751 metal Inorganic materials 0.000 claims abstract description 54
- 239000002184 metal Substances 0.000 claims abstract description 54
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052709 silver Inorganic materials 0.000 claims abstract description 41
- 239000004332 silver Substances 0.000 claims abstract description 41
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 239000003086 colorant Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004590 computer program Methods 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000123 paper Substances 0.000 description 6
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 206010017472 Fumbling Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
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- Ink Jet (AREA)
Abstract
The invention discloses a color management method, a device and a storage medium for digital ink-jet printing. The method comprises the following steps: printing a standard color table or a standard test chart according to the first printing data to obtain the maximum color gamut of the digital ink-jet printing device, thereby obtaining first color data; the CMYK four-color matching of the equipment reaches the optimal state according to the first color data; adding silver ink into the equipment, and performing printing test by using different ink ladder bars to obtain an optimal silver ink level adjustment value; adjusting the first printing data according to the silver ink quantity corresponding to the optimal silver ink tone value to obtain second printing data; printing a standard color table or a standard test chart according to the second printing data so as to enable the matching of the metal colors to reach an optimal state and obtain second color data; acquiring metal color data, and adjusting the metal color data by adopting second color data to acquire a metal spot color database; printing according to the metal spot color database. The invention can improve the matching accuracy of the special metal color and reduce the manual intervention.
Description
Technical Field
The present disclosure relates to the field of printing technologies, and in particular, to a color management method, apparatus, and storage medium for digital inkjet printing.
Background
The digital ink-jet proofing system in the current market has various kinds, is matched with various color management software and hardware, adopts corresponding color conversion algorithm to carry out color correction and matching, has been widely applied to matching of four colors and common spot colors, and shows good effect. However, in the aspect of simulation and matching of the spot metal color, the digital ink-jet proofing system does not have a mature and reliable method, and at present, the actual proofing effect of the spot metal color still stays in the fumbling stage, so that the actual proofing effect of the spot metal color often cannot reach the expectation, even needs multiple rounds of manual intervention, and has a large improvement space in the aspects of efficiency and accuracy.
The matters in the background section are only those known to the inventors and do not, of course, represent prior art in the field.
Disclosure of Invention
In view of the foregoing, a first aspect of the present invention provides a color management method for digital inkjet printing.
The invention provides a color management method for digital ink-jet printing, which comprises the following steps:
printing a standard color table or a standard test chart according to the first printing data to obtain the maximum color gamut of the digital ink-jet printing device, thereby obtaining first color data;
according to the first color data, enabling CMYK four-color matching of the digital ink-jet printing equipment to reach an optimal state;
adding silver ink into the digital ink-jet printing equipment, and performing printing test by using different ink ladder bars to obtain an optimal silver ink gradation value;
adjusting the first printing data according to the silver ink quantity corresponding to the optimal silver ink tone value to obtain second printing data;
printing the standard color table or the standard test chart according to the second printing data to enable the matching of the metal colors to reach an optimal state and obtain second color data;
acquiring metal color data, and adjusting the metal color data by adopting the second color data to acquire a metal spot color database; and
and printing according to the metal spot color database.
In some embodiments of the invention, acquiring the metal color data includes:
the standard pantong metal spot color data is called; or (b)
The metallic color data is manually entered.
In some embodiments of the present invention,
adjusting the metallic color data using the second color data to obtain a metallic spot color database includes:
adjusting the metal color data by adopting the second color data to obtain third printing data;
printing according to the third printing data to obtain a sample sheet; and
judging whether the difference between the sample sheet and the standard pattern is within a preset standard,
if not, the third printing data is adjusted, and printing is performed again until the difference between the sample and the standard pattern is within the preset standard.
In some embodiments of the invention, the predetermined criterion is a color difference ΔE < 2.
In some embodiments of the invention, the metallic color is mixed from a first ink selected from one or more of orange ink, light black ink, light cyan ink, light magenta ink, yellow ink, and red ink, and a second ink that is the silver ink.
In some embodiments of the invention, the difference between the different ink ladder bars is 5% for a total of 21 levels; or the difference between the different ink ladder bars is 10 percent, 11 grades in total.
A second aspect of the invention provides an apparatus comprising:
a processor; and
and a memory storing computer instructions that, when executed by the processor, cause the processor to perform the color management method described above.
A third aspect of the present invention provides a non-transitory computer storage medium storing a computer program which, when executed by one or more processors, causes the processors to perform the above-described color management method.
The color management method provided by the invention can greatly improve the matching accuracy of the special metal color, can reduce the links of manual intervention in the earlier stage, reduce the time of color mixing rounds and improve the printing efficiency; the production period can be shortened, the production cost can be reduced, and the working efficiency can be improved. The method provided by the invention can be used for establishing a metal spot color database by combining the existing software and hardware with the color management method without increasing any cost, and more than 90% of the metal spot color database can be matched with the international Panone (PANTONE) color phase.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the exemplary embodiments of the disclosure and together with the description serve to explain the disclosure, and do not constitute an undue limitation on the disclosure. In the drawings:
fig. 1 is a flow chart of color management of digital ink jet according to an embodiment of the invention.
FIG. 2 is a standard color chart used in an embodiment of the present invention.
FIG. 3 illustrates the gradation values of the respective ink gradients in an embodiment of the present invention.
Fig. 4 shows a sample obtained according to an embodiment of the present invention.
Fig. 5 illustrates a standard pantone used in an embodiment of the present invention.
Fig. 6 shows a sample of a comparative example of the present invention.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
In the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
It should be noted that, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected: can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
The following detailed description of specific embodiments of the invention is provided in connection with the accompanying drawings and examples in order to provide a better understanding of the aspects of the invention and advantages thereof. However, the following description of specific embodiments and examples is for illustrative purposes only and is not intended to be limiting of the invention.
Fig. 1 shows a color management method for digital inkjet printing according to an embodiment of the present invention. Which includes the following steps S100-S700.
The method provided by the invention is a color management method for printing metal colors by digital ink-jet printing equipment. The metallic color of the present invention is formed by mixing a first ink and a second ink, and optionally, in the present invention, the first ink includes one or more of Orange (Orange) ink, light Black (Light Black) ink, black (Black) ink, cyan (Cyan) ink, magenta (Magenta) ink, yellow (Yellow) ink, red (Red) ink, light Cyan (Light Cyan) ink, and Light Magenta (Light Magenta) ink.
S100: and printing a standard color table or a standard test chart according to the first printing data to acquire the maximum color gamut of the digital ink-jet printing device, thereby acquiring the first color data.
The maximum color gamut refers to the maximum color gamut range in which the digital inkjet printing apparatus does not do the limitation of the ink amount.
Alternatively, in this step, the standard color table or the standard test chart is printed to determine the ink amount overrun threshold, thereby determining the maximum color gamut of the digital inkjet printing apparatus, and further obtaining the first color data corresponding to the maximum color gamut.
The digital ink-jet printing equipment has different performances, so that the maximum color gamut setting is different in test, and the digital ink-jet printing equipment can be specifically set according to the specific conditions of the digital ink-jet printing equipment.
The color meter and the test chart are pictures (highlight, midtone and darkness) for checking colors, and mainly serve for visual evaluation of printing colors, wherein the visual evaluation is mainly based on data (such as Lab values) measured by instruments, and the visual effect is secondary. The standard color chart and the standard test chart in this step can be selected according to the specific situation of the digital inkjet printing apparatus.
S200: the CMYK four colors of the digital ink jet printing apparatus are matched to an optimal state according to the first color data.
Alternatively, matching of CMYK four colors may be performed in software (e.g., CGS software) of the digital inkjet printing apparatus, and then the matched color data is subjected to a print test, so that the CMYK four colors matching reaches an optimal state.
The optimal state in the present invention means that the difference between the color data of the test sample sheet obtained at the time of the print test and the target color data is within a predetermined range. Alternatively, the predetermined range of this step may be a color difference ΔE < 5.
S300: and adding silver ink into the digital ink-jet printing equipment, and performing printing test by using different ink ladder bars to obtain the optimal silver ink gradation value.
In this step, only silver ink is added to the digital inkjet printing apparatus.
Optionally, the step includes:
adding silver ink into digital ink-jet printing equipment, and performing printing test by using different ink ladder bars to obtain a plurality of printing sample sheets;
and acquiring the silver ink tone values of a plurality of printing samples, thereby acquiring the optimal silver ink tone values.
In this step, the amounts of silver ink corresponding to the different silver ink tone values may be combined with the standard color chart or standard test chart used in S100 in software (e.g., CGS software) (i.e., the addition of the corresponding silver ink amount to the standard color chart or standard test chart is simulated in software), and the optimum silver ink tone value is determined according to the combination effect.
In this step, the difference between different ink ladder bars may be 5% for a total of 21 levels. Or the difference between different ink ladder bars may be 10% for 11 levels. Of course, other values may be used, and they may be set as needed, typically 10% and 11-level.
S400: and adjusting the first printing data according to the silver ink quantity corresponding to the optimal silver ink tone value to obtain second printing data.
Optionally, in this step, the silver ink amount corresponding to the optimal silver ink tone value is added to the first print data in software (i.e., the silver ink amount corresponding to the optimal silver ink tone value is added to the standard color chart or the standard test chart).
As described above, the metallic ink of the present invention is formed by mixing the first ink and the second ink (silver ink), the above steps S100 to S200 are to adjust the color data corresponding to the ink jet printing apparatus and the first ink, the above step S300 is to adjust the color data corresponding to the silver ink, and the present step S400 is to integrate the color data of the first ink and the silver ink, thereby obtaining the color data of the metallic color.
S500: and printing a standard color table or a standard test chart according to the second printing data so as to enable the matching of the metal colors to reach the optimal state and obtain second color data.
Optionally, this step also performs matching of metal colors in software (such as CGS software) of the digital inkjet printing apparatus, and then performs print testing on the matched color data, so that matching of metal colors reaches an optimal state. Similarly, the optimum state described herein also means that the difference between the color data of the test sample sheet obtained at the time of the print test and the target color data is within a predetermined range. Alternatively, the predetermined range of this step may be a color difference ΔE < 5.
In general, the gamut range of the metallic colors is smaller than the range of the maximum gamut of step S100.
S600: and acquiring metal color data, and adjusting the metal color data by adopting the second color data to acquire a metal spot color database.
Optionally, in this step, acquiring the metal color data may include:
the standard pantong metal spot color data is called; or (b)
The metallic color data is manually entered.
The standard pantonus metal spot color data can be self-contained in software or can be recorded into a database after self-test.
Optionally, in this step, adjusting the metal color data using the second color data to obtain the metal spot color database includes:
adopting the second color data to adjust the metal color data to obtain third printing data;
printing according to the third printing data to obtain a sample;
determining whether a difference between the proof and the standard pattern is within a predetermined standard,
if not, the third printing data is adjusted, and printing is performed again until the difference between the sample sheet and the standard pattern is within the preset standard.
Alternatively, the predetermined criterion for this step is a color difference ΔE < 2.
In this step, the second color data can be regarded as compensation data for compensating the metallic color data so that it is optimized to obtain print data closer to the metallic color.
And after the optimization is completed, obtaining an optimized metal spot color database.
S700: printing according to the metal spot color database.
The color management method provided by the invention can greatly improve the matching accuracy of the special metal color, can reduce the links of manual intervention in the earlier stage, reduce the time of color mixing rounds and improve the printing efficiency; the production period can be shortened, the production cost can be reduced, and the working efficiency can be improved. The method provided by the invention can be used for establishing the metal spot color database by combining the existing software and hardware with the color management method without increasing any cost, and more than 90% of the metal spot color database can be matched with the international pantony hue.
The color management matching method of the present invention will be described below with reference to specific embodiments. The process condition values taken in the examples below are exemplary and can be carried out with reference to conventional techniques for process parameters not specifically identified. The detection methods used in the examples described below are all conventional in the industry, except for the specific descriptions. Reagents and apparatus used in the technical scheme provided by the invention are available from conventional channels or markets unless otherwise specified.
Examples
The embodiment provides a color management method for digital ink-jet printing. The digital ink jet printing device used in this embodiment is an epson S80680 printer; the paper is China sun single powder white cardboard, and the paper ration is 250g/m 2 Gloss 17.5, lab values of L:95.67, a:0.85, b: -0.09; the colorimeter is an X-rite spectrophotometer eXact.
Specifically, the steps are as follows:
the standard color table shown in fig. 2 is printed using the original ink of the printer and paper, the maximum color gamut is calculated in combination with CGS software, and the first color data is obtained.
And then matching the CMYK four colors of the digital ink-jet printing equipment according to the first color data in CGS software, and then performing a printing test on the matched color data, so that the matching of the CMYK four colors reaches an optimal state. And when the color difference delta E is less than 5, the matching reaches the optimal state.
And then adding silver ink only into a printer, and performing printing test by using different ink ladder bars to obtain the optimal silver ink gradation value. Fig. 3 shows the gradation values of the respective ink gradients in the present embodiment.
And (3) adding silver ink amounts corresponding to different silver ink tone values into a standard color table or a standard test chart in the CGS software simulation, and confirming the optimal silver ink tone value according to the combination effect. In this example, the final confirmed optimal silver ink level was a level corresponding to 50% silver ink.
And then adding 50% of silver ink into the color table shown in fig. 2 in CGS software, matching, and then performing printing test on the matched color data, so that the matching effect reaches the optimal state, and obtaining second color data. And when the color difference delta E is less than 5, the matching reaches the optimal state.
And (3) the standard pantonus metal spot color data is called, the standard pantonus metal spot color data is regulated by adopting the second color data, and printing is carried out after the regulation is finished, so that a sample is obtained. The standard pantonus metal spot color data used in this example is data of PANTONE 10116C. And then measuring the sample, and storing the adjusted color data when the color difference delta E is less than 2, thus obtaining the required metal special color database.
Printing according to the metal spot color database. Fig. 4 is a sample sheet obtained by printing in this embodiment. Fig. 5 is a standard pantone color card. Wherein the color difference delta E between the sample sheet shown in FIG. 4 and the standard pantone color card shown in FIG. 5 is 1.69.
Comparative example
The digital inkjet printing apparatus used in this comparative example was an epson S80680 printer; the paper is China sun single powder white cardboard, and the paper ration is 250g/m 2 Gloss 17.5, lab values of L:95.67, a:0.85, b: -0.09; the colorimeter is an X-rite spectrophotometer eXact.
Specifically, the steps are as follows:
the standard color table shown in fig. 2 is printed using the original ink of the printer and paper, the maximum color gamut is calculated in combination with CGS software, and the first color data is obtained.
And then matching the CMYK four colors of the digital ink-jet printing equipment according to the first color data in CGS software, and then performing a printing test on the matched color data, so that the matching of the CMYK four colors reaches an optimal state. And when the color difference delta E is less than 5, the matching reaches the optimal state.
And (3) the standard pantonus metal spot color data is called, the first color data is adopted to adjust the standard pantonus metal spot color data, and printing is carried out after adjustment is finished, so that a sample is obtained. The standard pantonus metal spot color data used in this comparative example is that of PANTONE 10116C.
Fig. 6 is a sample obtained in this comparative example. The color difference delta E between the sample sheet shown in FIG. 6 and the standard pantone color card shown in FIG. 5 is 13.76.
From the above examples and comparative examples, the method provided by the present invention is better able to simulate metallic colors.
Further, the color management method of the present invention may be implemented by means of an apparatus or a non-transitory computer storage medium.
The apparatus includes a processor and a memory. Wherein the memory stores computer instructions. The computer instructions, when executed by a processor, cause the processor to perform the color management method of digital inkjet printing described above.
The non-transitory computer storage medium includes a computer program stored thereon. The computer program, when executed by one or more processors, causes the processors to perform the color management method of digital inkjet printing described above.
It should be understood that the above-described device embodiments are merely illustrative, and that the device of the present application may be implemented in other ways. For example, the division of the units/modules in the above embodiments is merely a logic function division, and there may be another division manner in actual implementation. For example, multiple units, modules, or components may be combined, or may be integrated into another system, or some features may be omitted or not performed.
The units or modules illustrated as separate components may or may not be physically separate. The components described as units or modules may be physical units, may be located in one apparatus, or may be distributed over a plurality of apparatuses. The scheme of the embodiment of the application can be realized by selecting part or all of the units according to actual needs.
In addition, each functional unit/module in each embodiment of the present application may be integrated into one unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated together, unless otherwise specified. The integrated units/modules described above may be implemented either in hardware or in software program modules.
The integrated units/modules, if implemented in hardware, may be digital circuits, analog circuits, etc. Physical implementations of hardware structures include, but are not limited to, transistors, memristors, and the like. The processor may be any suitable hardware processor, such as CPU, GPU, FPGA, DSP and ASIC, etc., unless otherwise specified. The Memory unit may be any suitable magnetic or magneto-optical storage medium, such as resistive Random Access Memory RRAM (Resistive Random Access Memory), dynamic Random Access Memory DRAM (Dynamic Random Access Memory), static Random Access Memory SRAM (Static Random-Access Memory), enhanced dynamic Random Access Memory EDRAM (Enhanced Dynamic Random Access Memory), high-Bandwidth Memory HBM (High-Bandwidth Memory), hybrid Memory cube HMC (Hybrid Memory Cube), etc., unless otherwise indicated.
The integrated units/modules may be stored in a computer readable memory if implemented in the form of software program modules and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a memory, including several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A color management method for digital inkjet printing, comprising:
printing a standard color table or a standard test chart according to the first printing data to obtain the maximum color gamut of the digital ink-jet printing device, thereby obtaining first color data;
according to the first color data, enabling CMYK four-color matching of the digital ink-jet printing equipment to reach an optimal state;
adding silver ink into the digital ink-jet printing equipment, and performing printing test by using different ink ladder bars to obtain an optimal silver ink gradation value;
adjusting the first printing data according to the silver ink quantity corresponding to the optimal silver ink tone value to obtain second printing data;
printing the standard color table or the standard test chart according to the second printing data so as to enable the matching of the metal colors to reach an optimal state and obtain second color data;
acquiring metal color data, and adjusting the metal color data by adopting the second color data to acquire a metal spot color database; and
and printing according to the metal spot color database.
2. The method of claim 1, wherein obtaining metallic color data comprises:
the standard pantong metal spot color data is called; or (b)
The metallic color data is manually entered.
3. The method of claim 1, wherein adjusting the metallic color data using the second color data to obtain a metallic spot color database comprises:
adjusting the metal color data by adopting the second color data to obtain third printing data;
printing according to the third printing data to obtain a sample sheet; and
judging whether the difference between the sample sheet and the standard pattern is within a preset standard,
if not, the third printing data is adjusted, and printing is performed again until the difference between the sample and the standard pattern is within the preset standard.
4. A color management method as defined in claim 3, characterized in that said predetermined criterion is a color difference Δe < 2.
5. The color management method according to claim 1, wherein said metal color is formed by mixing a first ink and a second ink, said first ink being one or more selected from orange ink, light black ink, light cyan ink, light magenta ink, yellow ink and red ink, and said second ink being said silver ink.
6. The color management method according to claim 1, wherein the difference between the different ink ladder bars is 5%, total 21 levels; or the difference between the different ink ladder bars is 10 percent, 11 grades in total.
7. An apparatus, comprising:
a processor; and
a memory storing computer instructions that, when executed by the processor, cause the processor to perform the color management method of any of claims 1-6.
8. A non-transitory computer storage medium storing a computer program which, when executed by one or more processors, causes the processors to perform the color management method of any of claims 1-6.
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