CN101987529B - Digital sample printing method of spot color participation image - Google Patents
Digital sample printing method of spot color participation image Download PDFInfo
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- CN101987529B CN101987529B CN2009100561185A CN200910056118A CN101987529B CN 101987529 B CN101987529 B CN 101987529B CN 2009100561185 A CN2009100561185 A CN 2009100561185A CN 200910056118 A CN200910056118 A CN 200910056118A CN 101987529 B CN101987529 B CN 101987529B
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Abstract
The invention relates to a digital sample printing method of a spot color participation image, comprising the following steps of: preparing a GMG (Gif Movie Gear) spot color scale plate; correcting the difference between a GMG built-in Pantone spot color library and a gravure sample, including printing a spot color scale digital sample by using the built-in Pantone spot color library before printing; printing a spot color gravure sample by using the GMG spot color scale plate to make a field color value consistent with the digital sample; respectively measuring the dot area coverage rate or the density value of the spot color scale digital sample and the spot color gravure sample, and respectively generating a curve; and improving the effect of the spot color scale digital sample to make the two curves approximate as much as possible. The invention provides an adjustment basis for prepress staffs on the manuscript type of spot color participation electroanalysis, and the EPSON effect of using GMG sample printing is very approximate to the gravure sample printing effect; the prepress staffs can use EPSON sample printing to carry out accurate spot color simulate sample printing to realize color sample printing; the spot color simulated by digital sample printing is very approximate to the printing effect, and thereby, the sampling demand of clients on such type of manuscripts is satisfied, the rework rate is reduced and the cost is reduced.
Description
Technical field
The present invention relates to proofing method, particularly relate to the digital sample printing method that a kind of special look is participated in image.
Background technology
Traditional method to special look participation image before the seal is: in Photoshop, simulate special look form and aspect through the color matching of CMYK four color separations.The shortcoming of this way is following:
After in Photoshop, special look being substituted with four color separations, specially look just lost before drawing a design with the hierarchical relationship that laminates each other of color separation.
Even specially the simulation of the form and aspect on the spot of look more approaching,, special look still can not reach satisfied result but being hung the simulation of netting look.
Because above-mentioned shortcoming, the digital sample printing that causes special look to participate in image can't realize What You See Is What You Get, makes before client, the seal producer can't trust the special chromatic number sign indicating number result that draws a design.
Summary of the invention
Technical problem to be solved by this invention is exactly to provide a kind of special look to participate in the digital sample printing method of image for the defective that overcomes above-mentioned prior art existence.
The object of the invention can be realized through following technical scheme: a kind of special look is participated in the digital sample printing method of image, it is characterized in that, may further comprise the steps:
1) prepares the special look step-wedge of GMG version;
2) difference of correction GMG built-in Pantone special look storehouse and recessed appearance:
21) use the special look of built-in Pantone storehouse to print the digital appearance of special look step-wedge before the seal;
22) beat special look recessed appearance with the special look step-wedge of GMG version, making on the spot, color-values reaches consistent with digital appearance;
23) measure the digital appearance of special look step-wedge and specially the dot area coverage rate or the density value of look recessed appearance respectively, and the difference formation curve;
24) improve the digital appearance of special look step-wedge effect, make above-mentioned two curves approaching as far as possible.
Described step 1) further comprises:
11) prepare the built-in step-wedge file of GMG software before the seal;
12) use the special look electricity carver commonly used engraving step-wedge of planting.
Described look step-wedge comprises the digital appearance of cyan, the digital appearance of magenta, special blue digital appearance, special green digital kind and special red digital appearance for digital kind.
Described step 24), loads the adjustment curve based on special look recessed appearance curve for when beating special look recessed appearance with the special look step-wedge of GMG version.
Described step 24) for adjusts special look electricity carving curve based on special look recessed appearance curve.
Compared with prior art; The present invention provides the adjustment foundation for the preceding personnel of seal on the contribution type that specially look participation electricity divides; Traditional way is to look for the approaching specially form and aspect of look to simulate special look with color separation according to the gravure chromatogram to draw a design; The effect of coming out is very undesirable; The EPSON effect of utilizing GMG to draw a design is very approaching with the recessed kind of effect of drawing a design; Personnel just can use EPSON to draw a design to carry out accurately specially look to simulate to draw a design, realize the What You See Is What You Get that special look is drawn a design before the seal; Special look by digital sample printing simulation has satisfied the see kind requirement of client to this type of contribution, and has reduced rework rate very near printing effect; Reduced cost (in the past when doing the contribution of many specially looks participation electricity branches; All be to see the recessed appearance of test back final version to the client, the cycle is long, and cost is high).
Description of drawings
Fig. 1 is the step-wedge file sketch map of the embodiment of the invention;
Fig. 2 is digital sample printing and the recessed kind of reduction curve synoptic diagram one of drawing a design of the embodiment of the invention;
Fig. 3 is digital sample printing and the recessed kind of reduction curve synoptic diagram two of drawing a design of the embodiment of the invention;
Fig. 4 is that the complete specially look of the embodiment of the invention is participated in contribution digital sample printing and recessed appearance reduction comparison diagram under standard sources.
Wherein: a is the recessed kind of curve of drawing a design, and b is the digital sample printing curve.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.
The present invention reaches the form and aspect of the special look of accurate simulation extension nets at different levels through the form and aspect that let digital sample printing simulate special look step-wedge, and can in the maximum gamut of printing the function realization, make special look form and aspect the most approaching through the circulation correction.With respect to only simulate special look on the spot form and aspect to carry out digital sample printing be a progress.
Embodiment
The present embodiment step is following:
1) prepare the special look step-wedge of GMG version:
11) prepare special look step-wedge file before the seal: the built-in step-wedge file of GMG software is used in suggestion, can realize automatic measurement.Like Fig. 1;
12) the special look step-wedge of engraving: use special look electricity carver commonly used to plant and carve step-wedge (carving like legal, the anti-version of pearly-lustre film, anti-edition three kinds electric carver's skills of aluminium foil), different processes can be carved on a version roller, conveniently draws a design;
13) the version roller that engraving is good leaves between recessed sample car subsequent use, notes the protection of version roller.
2) difference of correction GMG built-in Pantone special look storehouse and recessed appearance:
21) use the special look of built-in Pantone storehouse to print the digital appearance of special look step-wedge before the seal; Suggestion is printed several kinds of representational colors and is convenient for measuring (like cyan, magenta, specially blue, specially green, specially red etc.);
22) beat special look recessed appearance with the special look step-wedge of GMG version, make on the spot color-values and digital appearance reach consistent (generally Δ E＜2 can think reach requirement);
23) measuring digital sample printing draws a design with recessed appearance and goes back virgin curve: measure the dot area coverage rate or the density value of the digital appearance of special look step-wedge and kind of special look recessed respectively, difference formation curve in Excel.Like Fig. 2;
24) improve the special look effect of drawing a design: two kinds of method improvement effects are arranged, the one, loading curve when GMG beats special look, the 2nd, adjust special look electricity and carve curve.It is approaching that the result who finally reaches is that two curves will be tried one's best, like Fig. 3;
3) set up the special look of particular customer storehouse:
A lot of internationally recognizable brands all have own specific special look storehouse, such as P&G.Will set up special look storehouse for this client to particular customer.Step is following:
31) obtain the special look database of client (being the LAB value of target that the client requires): generally through two kinds of methods, the one, directly take the desired value of all special looks of client, the 2nd, the special look full pattern that provides through measuring customer.(database is not generally accomplished to settle at one go, need in cooperative process, constantly accumulate, and is constantly perfect.)
32) difference of correction client special look storehouse and recessed appearance (or printing): trimming process is the same.
4) special look is participated in the digital sample printing workflow of image:
41) production technology portion formulates special look artistic carving: participate in electricity based on client's special look and divide the contribution type, formulate special look artistic carving, and carry out record;
42) specially the chromatic number sign indicating number is drawn a design: use the special look storehouse corresponding with artistic carving to carry out digital sample printing before the seal.(like glue appearance, sample) will chase after if the client has special look full pattern, then will measure, and verify the reducing degree of digital sample printing and recessed appearance as required.And the special color range that in software, loads correspondence transfers curve to draw a design;
43) specially look recessed appearance is drawn a design: the contribution that special look is participated in, recessed appearance need the measuring color value when drawing a design.Making on the spot color-values and digital appearance reach consistent (general Δ E＜2 can think reach requirement), is that a complete specially look is participated in contribution digital sample printing and recessed kind of reduction ratio be under standard sources like Fig. 4.
Claims (3)
1. the digital sample printing method of a special look participation image is characterized in that, may further comprise the steps:
1) prepares the special look step-wedge of GMG version;
2) difference of correction GMG built-in Pantone special look storehouse and recessed appearance:
21) use the special look of built-in Pantone storehouse to print the digital appearance of special look step-wedge before the seal;
22) beat special look recessed appearance with the special look step-wedge of GMG version, making on the spot, color-values reaches consistent with digital appearance;
23) measure the digital appearance of special look step-wedge and specially the dot area coverage rate or the density value of look recessed appearance respectively, and the difference formation curve;
24) improve the digital appearance of special look step-wedge effect, make above-mentioned two curves approaching as far as possible;
The digital appearance of the special look step-wedge of described improvement effect method loads the adjustment curve or adjusts special look electricity carving curve according to special look recessed appearance curve according to special look recessed appearance curve for when beating special look recessed appearance with the special look step-wedge of GMG version.
2. a kind of special look according to claim 1 is participated in the digital sample printing method of image, it is characterized in that described step 1) further comprises:
11) prepare the built-in step-wedge file of GMG software before the seal;
12) use the special look electricity carver commonly used engraving step-wedge of planting.
3. based on the digital sample printing method of claim 1 or 2 described a kind of special looks participation images, it is characterized in that described look step-wedge comprises the digital appearance of cyan, magenta number appearance, special blue digital kind, special green digital kind and special red digital appearance for digital kind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100561185A CN101987529B (en) | 2009-08-07 | 2009-08-07 | Digital sample printing method of spot color participation image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100561185A CN101987529B (en) | 2009-08-07 | 2009-08-07 | Digital sample printing method of spot color participation image |
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| CN101987529A CN101987529A (en) | 2011-03-23 |
| CN101987529B true CN101987529B (en) | 2012-08-15 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103129184B (en) * | 2011-11-30 | 2015-03-25 | 北大方正集团有限公司 | Special colour calibration method and device thereof |
| CN103042853B (en) * | 2013-01-21 | 2014-07-16 | 上海紫恩数码科技有限公司 | Special colour simulation method |
| CN104965970B (en) * | 2015-04-30 | 2017-09-12 | 华文包装股份有限公司 | Spot color for packages printing multimedium digital proof determines method |
| CN108460716B (en) * | 2018-01-30 | 2022-05-10 | 大连工业大学 | Digital watermarking method and system for spot color printing image |
| CN110774729B (en) * | 2019-10-15 | 2021-02-26 | 中荣印刷集团股份有限公司 | High-fidelity offset printing method based on seven primary colors |
| CN111914316B (en) * | 2020-07-17 | 2024-01-12 | 陕西科技大学 | Design method of intaglio special color digital ladder ruler based on spectral reflectivity |
| CN114638786B (en) * | 2022-02-21 | 2022-12-13 | 杭州印鸽科技有限公司 | Picture printing effect simulation system and color matching method for different processes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0601933A2 (en) * | 1992-12-10 | 1994-06-15 | Minnesota Mining And Manufacturing Company | Electrophotographic color proofing system for gravure printed images |
| CN1467566A (en) * | 2003-04-30 | 2004-01-14 | 上海龙樱彩色制版有限公司 | Colour management method in digital proofing |
| US7430069B2 (en) * | 2005-04-18 | 2008-09-30 | Dainippon Screen Mfg. Co., Ltd. | Method of converting image data, image data conversion apparatus and program |
-
2009
- 2009-08-07 CN CN2009100561185A patent/CN101987529B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0601933A2 (en) * | 1992-12-10 | 1994-06-15 | Minnesota Mining And Manufacturing Company | Electrophotographic color proofing system for gravure printed images |
| CN1467566A (en) * | 2003-04-30 | 2004-01-14 | 上海龙樱彩色制版有限公司 | Colour management method in digital proofing |
| US7430069B2 (en) * | 2005-04-18 | 2008-09-30 | Dainippon Screen Mfg. Co., Ltd. | Method of converting image data, image data conversion apparatus and program |
Non-Patent Citations (1)
| Title |
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| JP昭58-225346A 1983.12.27 |
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Effective date of registration: 20130105 Address after: 231400 Tongcheng City, Anqing Province, private Economic Development Zone Xingyuan West Road Patentee after: Tongcheng Yuncheng Platemaking Co., Ltd. Address before: 201805 Jiading District Town, Anting, Qinan Road, No. 288, No. Patentee before: Shanghai Yunan Plate-Making Co., Ltd. |