CN102029780A - Method and device for controlling stability of printing color - Google Patents
Method and device for controlling stability of printing color Download PDFInfo
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- CN102029780A CN102029780A CN 201010286003 CN201010286003A CN102029780A CN 102029780 A CN102029780 A CN 102029780A CN 201010286003 CN201010286003 CN 201010286003 CN 201010286003 A CN201010286003 A CN 201010286003A CN 102029780 A CN102029780 A CN 102029780A
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Abstract
The invention discloses a method and a device for controlling the stability of a printing color, wherein the method comprises the following steps: control color lumps added on a printing material are measured when the printing at each time is carried out to obtain the measuring value of each color lattice point of the printing material; a printing output curve is obtained according to the input value and the measuring value of each color lattice point and is compared with a first target curve to obtain the input congruent relationship of the printing output curve and the first target curve; and a compensation curve is obtained according to the input congruent relationship, and the printing input curve is compensated according to the compensation curve when the printing at next time is carried out.
Description
Technical field
The present invention relates to print field, in particular to a kind of control method and device of printing color stability.
Background technology
In the printing industry, the color that focuses on of the control of production is controlled, and the stability that focuses on keeping the output color of color control.In the printing process, As time goes on, equipment (printing machine, platemaking machine etc.) is aging, environment (temperature, humidity etc.) changes, the fluctuation of the instability of consumptive material (paper, printing ink, blanket, sheet material etc.) quality, process control parameter (as the temperature of fountain solution, pH value, electrical conductivity, isopropyl alcohol concentration etc.) etc., all can exert an influence to the stability of printing output color.
Present printing to printing the stable method that generally adopts of controlling is: consumptive materials such as the paper of (1) employing same brand and model, printing ink, blanket, fountain solution; (2) control the humiture in workshop with air-conditioning, humidifier etc.; (3) printing machinery time-based maintenance; (4) every printing machine is kept the temperature, pH value, electrical conductivity, isopropyl alcohol concentration etc. of its fountain solution in metastable scope.Yet, safeguard that in any case equipment can wear out, raw material quality and workshop condition neither absolute stabilities, printing output color is always drifted about, and the time increase, side-play amount is big more.
The stable of printing color mainly is the site size that can control on the stocks such as being printed onto paper, the printing net-point size is mainly controlled with forme site size, the forme site is adjusted with the site compensated curve, so enlarging curve, printing net-point to reach aim curve, involve the curve compensation of two aspects: the one, the compensation of plate-making linearization curve guarantees that the site input of platemaking equipment is consistent with output; The 2nd, the compensation that printing net-point enlarges makes the site and the target site size of printing output be complementary by adjusting forme site size.
Now at color drift, the method that adopts all is regularly the color of the array output of equipment, material, environment, parameter to be carried out regular calibration, make its output revert to reset condition, the color that guarantees printing output is in controlled scope, its basic step is: correcting CT P (Computer To Plate, off line is directly made a plate) → do not add curve, and step-wedge is exported in plate-making, printing → measurement printing, calculate compensated curve → correcting CT P → add compensated curve, Plate making printing → correction grey balance.
Correction each time to printing output, all to make a plate, print beta version separately, consumption to materials such as paper, plate, printing ink is bigger, in addition, correction time is generally more than half a day, the temporal loss of printing machine also is very big, and these all will be paid separately by the printing house, have increased printing cost.And adopt this bearing calibration, be that dot gain direct compensation from zero site compensated curve is to the target dot gain, compensation magnitude is bigger, the dot gain curve fluctuation that often generates in the actual production is bigger, do not ensure on the output after the compensation and the coupling of aim curve, need repeatedly compensate, consume also just corresponding increasing.
Summary of the invention
The invention provides a kind of control method and device of printing color stability, in order to improve the stability of printing color output.
According to an aspect of the present invention, provide a kind of control method of printing color stability, this method may further comprise the steps: when each printing the control color lump that is added on the printed matter is measured, obtained the measured value of the site of all kinds of printed matter; Input value and measured value according to site of all kinds obtain printing curve of output, and it is compared with first aim curve, obtain printing the input corresponding relation of the curve of output and first aim curve; Be compensated curve according to this input corresponding relation, and when printing next time, the printing curve of output compensated according to this compensated curve.
According to another aspect of the present invention, a kind of control device of printing color stability also is provided, this device comprises: first measurement module, be used for when each printing, the control color lump that is added on the printed matter being measured, and obtain the measured value of the site of all kinds of printed matter; First comparison module is used for obtaining printing curve of output according to the input value and the measured value of site of all kinds, and it is compared with first aim curve, obtains printing the input corresponding relation of the curve of output and first aim curve; The printing compensating module is used for being compensated curve according to the input corresponding relation, and according to this compensated curve the printing input curve is compensated when printing next time.
The foregoing description will print the curve of output aim curve corresponding with it and compare when each printing, input corresponding relation according to both is compensated curve, thereby when printing next time, in real time the printing input curve is compensated according to compensated curve, improved the matching degree of printing curve of output and its aim curve, guaranteed the stability of printing color, and saved the temporal waste of printing consumable material and printing machine effectively, overcome problems of the prior art.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the control method flow chart of printing color stability according to an embodiment of the invention;
Fig. 2 is the control method schematic diagram according to the printing color stability of a preferred embodiment of the present invention;
Fig. 3 is the second compensation schematic diagram when single compensation surmounts according to an embodiment of the invention;
Fig. 4 is the second compensation method schematic diagram when single compensation is not enough according to an embodiment of the invention;
Fig. 5 is the control device schematic diagram of printing color stability according to an embodiment of the invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not paying the every other embodiment that is obtained under the creative work prerequisite.
Fig. 1 is the control method flow chart of printing color stability according to an embodiment of the invention.As shown in Figure 1, this method may further comprise the steps:
S102 measures the control color lump that is added on the printed matter when each printing, obtains the measured value of the site of all kinds of printed matter;
S104 obtains printing curve of output according to the input value and the measured value of site of all kinds, and it is compared with first aim curve, obtains printing the input corresponding relation of the curve of output and first aim curve;
S106 is compensated curve according to the input corresponding relation, and according to this compensated curve the printing input curve is compensated when printing next time.
Present embodiment will print the curve of output aim curve corresponding with it and compare when each printing, input corresponding relation according to both is compensated curve, thereby when printing next time, in real time the printing input curve is carried out real-Time Compensation according to this compensated curve, improved the matching degree of printing curve of output and its aim curve, guaranteed the stability of printing color, and saved the temporal waste of printing consumable material and printing machine effectively, overcome problems of the prior art.
In the above-described embodiments, input value and measured value according to site of all kinds obtain printing curve of output, and it is compared with first aim curve, the input corresponding relation step that obtains printing the curve of output and first aim curve comprises: according to the input site of forme and target network dot generation first aim curve after the printing; Generate the printing curve of output according to the actual site after input site and the printing; According to when getting identical output valve, first aim curve and printing curve of output be the input site of correspondence respectively, obtains importing the corresponding relation of site.
For example, establish the big or small x of being in input site of forme in the printing process
i, the target site size after the printing is Y
i, formation curve is Y=f (x).If the input site of forme size is x in the actual print process
i, the actual measurement site size after the printing is y
i, formation curve is
According to actual and desirable curve of output, find out the different input points under the identical output result, hypothetical target output point Y
iThe last corresponding aim curve and the input value of actual curve are respectively x
iAnd x '
i, then have:
Realistic border printing input-output curve function
Inverse function
Then can obtain x '
iValue:
Can obtain x by formula (2)
iWith x '
iThe array corresponding relation, the curve of generation is exactly the site compensated curve that adopts in this when output plate-making.
In the above-described embodiments, can also may further comprise the steps before when each printing, printed matter being carried out measuring process: current plate-making is measured, obtain the curve of output of current plate-making; Curve of output is compared with second aim curve, obtain the difference of the curve of output and second aim curve; When making a plate next time, the curve of output of plate making is carried out linearity correction according to this difference.Wherein, when the linearisation of plate-making self, the aim curve of plate making is the linear function that output equals to import.
Fig. 2 is the control method schematic diagram according to the printing color stability of a preferred embodiment of the present invention.As shown in the figure, this embodiment comprises plate-making compensation and printing compensation.On the pattern of each printing, all add a step-wedge of all kinds.Compensation is divided into two aspects: compensation of plate-making site and printing net-point compensation.Plate-making compensated curve (linearization curve) is the result of calculation to last time plate-making curve of output and aim curve; The printing compensated curve also is the compensation to printing net-point expansion last time curve, and circulation and so forth just can compensate in process of production because conditional fluctuations such as equipment, technology to the influence of printing output, make printing net-point be stabilized in the size of regulation.
Fig. 3 is the second compensation schematic diagram when single compensation surmounts according to an embodiment of the invention; Fig. 4 is the second compensation method schematic diagram when single compensation is not enough according to an embodiment of the invention.EG=EF-ED among Fig. 3, EG=EF+ED among Fig. 4.In Fig. 3 and Fig. 4, line 1 is desirable straight line, and line 2 is an aim curve, line 3 is the single compensation curve, line 4 is the curve that obtains through compensation back, site actual print, and line 5 is the second compensation difference curve, and line 6 is second compensation curve (being calculated by line 1,4,5).Repeatedly the same second compensation of Bu Chang situation on the basis of curve last time, carries out compensating operation again.In whole printing process, the field density that will adopt of all kinds is identical.The dot gain curve that each printing produces calculatings of all comparing with aim curve generates the site compensated curve that prints next time.Like this, plate-making each time and printing all are the corrections of last plate-making and printing, not only effectively save the temporal waste of printing consumable material and printing machine by this method, and improved the matching degree of curve of output and aim curve, can effectively solve the stability problem of printing.
Fig. 5 is the control device schematic diagram of printing color stability according to an embodiment of the invention, and this device comprises:
First measurement module 10 is used for when each printing the control color lump that is added on the printed matter being measured, and obtains the measured value of the site of all kinds of printed matter;
First comparison module 20 is used for obtaining printing curve of output according to the input value and the measured value of site of all kinds, and it is compared with first aim curve, obtains printing the input corresponding relation of the curve of output and first aim curve;
Printing compensating module 30 is used for being compensated curve according to the input corresponding relation, and according to this compensated curve the printing input curve is compensated when printing next time.
Present embodiment will print the curve of output aim curve corresponding with it and compare when each printing, input corresponding relation according to both is compensated curve, thereby when printing next time, in real time the printing input curve is carried out real-Time Compensation according to compensated curve, improved the matching degree of printing curve of output and its aim curve, guaranteed the stability of printing color, and saved the temporal waste of printing consumable material and printing machine effectively, overcome problems of the prior art.
For example, above-mentioned control device can also comprise: second measurement module, be used for current plate-making is measured, and obtain the curve of output of current plate-making; Second comparison module is used for curve of output is compared with second aim curve, obtains the difference of the curve of output and second aim curve; The plate-making compensating module is used for when making a plate next time, according to this difference the curve of output of making a plate is carried out linearity correction.Wherein, when the linearisation of plate-making self, the aim curve of plate making is the linear function that output equals to import, and replenishes by making a plate and the printing compensation, further improve the matching degree of printing curve of output and aim curve, guaranteed the stability of printing output color.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, and module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the device among the embodiment can be described according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programmed instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the invention technical scheme.
Claims (5)
1. the control method of a printing color stability is characterized in that, may further comprise the steps:
When each printing, the control color lump that is added on the printed matter is measured, obtained the measured value of the site of all kinds of described printed matter;
Input value and measured value according to described site of all kinds obtain printing curve of output, and it is compared with first aim curve, obtain the input corresponding relation of described printing curve of output and described first aim curve;
Be compensated curve according to described corresponding relation, and when printing next time, the printing input curve compensated according to described compensated curve.
2. control method according to claim 1, it is characterized in that, input value and measured value according to described site of all kinds obtain printing curve of output, and it is compared with first aim curve, and the input corresponding relation step that obtains described printing curve of output and described first aim curve comprises:
According to the input site of forme and target network dot generation first aim curve after the printing;
Generate the printing curve of output according to the actual site after described input site and the printing;
According to when getting identical output valve, described first aim curve and described printing curve of output be the input site of correspondence respectively, obtains importing the corresponding relation of site.
3. control method according to claim 1 is characterized in that, and is further comprising the steps of before when each printing printed matter being carried out measuring process:
Current plate-making is measured, obtain the curve of output of described current plate-making;
Described curve of output is compared with second aim curve, obtain the difference of described curve of output and described second aim curve;
When making a plate next time, the curve of output of plate making is carried out linearity correction according to described difference.
4. the control device of a printing color stability is characterized in that, comprising:
First measurement module is used for when each printing the control color lump that is added on the printed matter being measured, and obtains the measured value of the site of all kinds of described printed matter;
First comparison module is used for obtaining printing curve of output according to the input value and the measured value of described site of all kinds, and it is compared with first aim curve, obtains the input corresponding relation of described printing curve of output and described first aim curve;
The printing compensating module is used for being compensated curve according to described input corresponding relation, and according to described compensated curve the printing input curve is compensated when printing next time.
5. control device according to claim 4 is characterized in that, also comprises:
Second measurement module is used for current plate-making is measured, and obtains the curve of output of described current plate-making;
Second comparison module is used for described curve of output is compared with second aim curve, obtains the difference of described curve of output and described second aim curve;
The plate-making compensating module is used for when making a plate next time, according to described difference the curve of output of making a plate is carried out linearity correction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102860038A CN102029780B (en) | 2010-09-19 | 2010-09-19 | Method and device for controlling stability of printing color |
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| CN2010102860038A CN102029780B (en) | 2010-09-19 | 2010-09-19 | Method and device for controlling stability of printing color |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103465657A (en) * | 2013-09-02 | 2013-12-25 | 中国印刷科学技术研究所 | Prediction method of printing color features of different printing materials |
| CN103786434A (en) * | 2012-10-26 | 2014-05-14 | 海德堡印刷机械股份公司 | Matching of old characteristic curve |
| CN106915155A (en) * | 2017-03-09 | 2017-07-04 | 贝加莱工业自动化（中国）有限公司 | Being pulled by curve carries out the system and method for printing machine phase adjustment |
| CN107042689A (en) * | 2017-04-24 | 2017-08-15 | 北京奇良海德印刷股份有限公司 | A kind of printing color quality detecting method |
| CN111267467A (en) * | 2020-03-02 | 2020-06-12 | 中国印刷科学技术研究院有限公司 | Offset printing standard test plate and production and application method thereof |
| CN112721486A (en) * | 2020-12-28 | 2021-04-30 | 深圳汉弘数字印刷集团股份有限公司 | Printing method and ink-jet printer |
| CN114714784A (en) * | 2022-03-03 | 2022-07-08 | 丝艾工业科技(海安)有限公司 | Method for manufacturing printing curve |
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| CN1537055A (en) * | 2001-07-30 | 2004-10-13 | 阿克利・马丁内斯公司Dba Mgi工作 | Color management processing system and method |
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| US5767980A (en) * | 1995-06-20 | 1998-06-16 | Goss Graphic Systems, Inc. | Video based color sensing device for a printing press control system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786434A (en) * | 2012-10-26 | 2014-05-14 | 海德堡印刷机械股份公司 | Matching of old characteristic curve |
| CN103465657A (en) * | 2013-09-02 | 2013-12-25 | 中国印刷科学技术研究所 | Prediction method of printing color features of different printing materials |
| CN103465657B (en) * | 2013-09-02 | 2015-11-18 | 中国印刷科学技术研究所 | Difference is undertaken the printing of the Forecasting Methodology of material print color characteristic |
| CN106915155A (en) * | 2017-03-09 | 2017-07-04 | 贝加莱工业自动化（中国）有限公司 | Being pulled by curve carries out the system and method for printing machine phase adjustment |
| CN107042689A (en) * | 2017-04-24 | 2017-08-15 | 北京奇良海德印刷股份有限公司 | A kind of printing color quality detecting method |
| CN107042689B (en) * | 2017-04-24 | 2019-05-03 | 北京奇良海德印刷股份有限公司 | A kind of printing color quality detecting method |
| CN111267467A (en) * | 2020-03-02 | 2020-06-12 | 中国印刷科学技术研究院有限公司 | Offset printing standard test plate and production and application method thereof |
| CN112721486A (en) * | 2020-12-28 | 2021-04-30 | 深圳汉弘数字印刷集团股份有限公司 | Printing method and ink-jet printer |
| CN114714784A (en) * | 2022-03-03 | 2022-07-08 | 丝艾工业科技(海安)有限公司 | Method for manufacturing printing curve |
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| CN102029780B (en) | 2012-04-25 |
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