CN106379049B - A kind of intaglio-printed image method of quality control - Google Patents
A kind of intaglio-printed image method of quality control Download PDFInfo
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- CN106379049B CN106379049B CN201610770653.7A CN201610770653A CN106379049B CN 106379049 B CN106379049 B CN 106379049B CN 201610770653 A CN201610770653 A CN 201610770653A CN 106379049 B CN106379049 B CN 106379049B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000003908 quality control method Methods 0.000 title claims abstract description 15
- 238000007639 printing Methods 0.000 claims abstract description 37
- 239000000976 ink Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 241000532370 Atla Species 0.000 claims description 5
- 241001062009 Indigofera Species 0.000 claims description 5
- 238000004587 chromatography analysis Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 210000004209 hair Anatomy 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000007726 management method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 2
- 238000001739 density measurement Methods 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
- A01C1/02—Germinating apparatus; Determining germination capacity of seeds or the like
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
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- Soil Sciences (AREA)
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- Spectrometry And Color Measurement (AREA)
Abstract
The present invention provides a kind of intaglio-printed image method of quality control, make CMYK colour atlas first；Then CMYK colour atlas are printed and is tested, ensure that dot gain in the range of tolerable variance of standard, obtains color rendition curve；Beta version is done using color rendition curve, three points are taken to control image per color from color rendition curve, shadow, middle tone and the bloom of three point difference correspondence images, the density value that three points measure is compared with standard value, if comes whether interpretation reaches requirement per color in range of tolerable variance；Finally according to the plate-making Copy Preparation of standard sample, color characteristic file and standard color curve.Method provided by the invention increases the control point of middle tone and shallow net, can directly be carved on printing plate in engraving, is not necessarily to other costs；After the lower machine of printing, directly measurement, which can be known whether, reaches requirement, avoids the subjectivity that Conventional visual sees sample.Method judges simply, easily operated, improves the accuracy and standard of intaglio-printed image quality control.
Description
Technical field
The present invention relates to a kind of methods for controlling the quality of intaglio-printed image, belong to gravure application field.
Background technology
For printing image, printing sample is first typically made by printing machine, sample to be printed confirm it is errorless after, then this is printed
The foundation of the sample visual determination final as printing machine.When printing machine only needs the standard sample for matching the pull of oneself Yu being confirmed
When, this method is used very well.However, when there are more printing machines in a company, since the state of every printing machine may not
Unanimously, thus the not consistent problem of result that identical color may be caused to be exported in various kinds of equipment.I.e. identical color has
Different color space-colour gamut, for this reason, it is necessary to carry out color management.
Briefly, the purpose of color management is to solve the problems, such as that the color that each color device is presented is inconsistent, reach
To the effect of What You See Is What You Get.It can be interpreted as a color translation system, be defined, organized with a kind of standard in other words
With management color information, make it to be converted and propagated between distinct device.
Currently used color management method is field density measurement method.The colour density measured in printing, refers to
It is measured respectively by three kinds of colour filters of red, green, blue and obtains the density of yellow, pinkish red, green ink.For example, for cyan ink, it
Complementary color be yellow, that is to say, that absorb the yellow light in light, densitometer is exactly using measurement to be reflected into blue content in human eye
Come judge yellow ink number, there is colour filter correlation to be arranged inside densitometer, when measuring green ink, instrument automatically switches to phase
Corresponding colour filter.When printing monitoring, the density value with densimeter measurement different colours, such as the density value of cyan are needed,
It reflects the thickness of Yellow ink colour filter and the depth of color, is the foundation for judging color rendering, and different colours have not
Same standard density range, the maximum of tusche, the minimum of yellow.
Density does not have coloured concept, and when measuring primary inks K (black), C (indigo plant), M (red), Y (Huang), densitometer utilizes
The principle of complementary color complementation measures the bright-dark degree of actually colors of ink.In intaglio printing, under the deeply certain feelings of version, survey
Four color densities are practical be exactly the pigment powder for surveying primary colors ink content, be substantially control inking amount, come accurately by controlling inking amount
Cmyk color is controlled to present.
So-called dot gain refers to, when ink is printed on stock from the transfer of halftoning printing plate, the presence of pressure and enable net
Point area increases (generally positive value, be in some cases negative value).If dot area increases 4%-5%, gray scale and each color
Balance can be affected.Site increase includes mechanical site increase and optics site increase.Mechanical dot gain by it is many because
The influence of element, for intaglio printing, possible influence factor includes：The viscosity of ink, rubber roller pressure, scraper angle
Deng.
To sum up, existing field density measurement method, when electric component low key tone and inconsistent shallow net, middle tone, it is difficult to
The problem of judgement is plate-making site or printing, needs to go to judge by experience, subjective, can not seek unity of standard, method
Accuracy is inadequate.
Invention content
The technical problem to be solved by the present invention is to how improve the accuracy of intaglio-printed image quality control and standard.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a kind of intaglio-printed image quality control sides
Method, which is characterized in that step is：
Step 1：Make CMYK contrast colour atlas
CMYK contrast colour atlas be indigo plant C, red M, Huang Y, tetra- color inks of black K respectively from shallow to deep, concentration produced by 0%-100%
The presentation of raw different color；
Step 2：The printing test of CMYK contrast colour atlas
CMYK contrasts colour atla is subjected to printing test on the printer, determines that ink uses producer, determines that printing technology is joined
Number, determines the solid density and dot gain rate tolerance of CMYK standards, by computer experiment several times, ensures dot gain
In the range of tolerable variance of standard, 0-100 stratum reticulare density values, that is, color rendition curve are measured；
Step 3：Make standard sample
Beta version is done with obtained color rendition curve, after repeated multiple times, obtains stable color rendition curve；From steady
Three points are taken to control image on fixed color rendition curve, shadow, middle tone and the bloom of three point difference correspondence images；
The CMYK of image is controlled per color by above three point, and the density value that three points are measured is compared with standard value, such as
Fruit error illustrates to reach requirement in range of tolerable variance；If error not in range of tolerable variance, illustrates not up to require, then carries out
Standard sample is made until reaching requirement in adjustment.
Step 4：Plate-making Copy Preparation
Plate-making factory obtains international color consortium ICC color characteristic files and standard color curve according to standard sample, according to ICC
Color characteristic file and the plate-making Copy Preparation of standard color curve.
Preferably, in the step 3, three points of the shadow of correspondence image, middle tone and bloom are respectively：100% is close
Angle value, 50% density value, 5% density value site.
Preferably, in the step 3, the density color lump for controlling low key tone of the every colors of CMYK is made, in control
Between density color lump, the density color lump for controlling high light adjusted, and be arranged in order, form the combination of CMYK density color lumps；By CMYK
The combination of density color lump is placed on the appropriate location in intaglio process brush material.
Preferably, the density color lump for controlling low key tone is the density color lump that net is 100% at number.
Preferably, the density color lump for controlling middle tone is the density color lump that net is 50% at number.
Preferably, the density color lump for controlling high light is the density color lump that net is 5% at number.
Preferably, the position that the CMYK density color lump combination is placed in intaglio process brush material is：Intaglio printing mark line one
Side, mark's line side chromatography cross hairs lower section.
Method provided by the invention when printing signed-off sample, measures three points of the CMYK per color compared with standard density value, to
Judge to need or increase or to reduce color, until adjusting to the range of tolerable variance of standard density, printing every time passes through survey
The density for measuring tri- points of CMYK prints consistent and printing quality to ensure that.
Method provided by the invention overcomes the deficiencies in the prior art, increases the control point of middle tone and shallow net, can be
It is directly carved on printing plate when engraving, is not necessarily to other costs；After the lower machine of printing, directly measurement, which can be known whether, reaches requirement, keeps away
The subjectivity that Conventional visual sees sample is exempted from.Method provided by the invention judges simply, easily operated, improves intaglio process map brushing
As the accuracy and standard of quality control.
Description of the drawings
Fig. 1 is CMYK colour atla schematic diagrames；
Fig. 2 is the density color lump schematic diagram of three kinds of stratum reticulares composition；
Fig. 3 is CMYK density color lump combination diagrams；
Fig. 4 is the position view that the combination of CMYK density color lumps is placed in intaglio process brush material.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, people in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
A kind of intaglio-printed image method of quality control, includes the following steps：
Step 1：Make CMYK contrast colour atlas
CMYK contrasts colour atla, that is, C (indigo plant), M (red), Y (Huang), four color inks of K (black) respectively from shallow to deep, concentration is by 0%-
The presentation of different color caused by 100%.
Step 2：The printing test of CMYK contrast colour atlas
CMYK contrasts colour atla is subjected to printing test on the printer, at this time it needs to be determined that ink uses producer, determines print
Brush technological parameter determines the solid density and dot gain rate tolerance of CMYK standards, passes through computer experiment several times, site
Expand in the range of tolerable variance of standard, measures 0-100 stratum reticulare density values, that is, color rendition curve.
Step 3：Make standard sample
Beta version is done with obtained color rendition curve, after being repeated several times, obtains stable color rendition curve, is such as schemed
Shown in 1.Three points are taken from stable color rendition curve to control image, respectively 100% density value, 50% density value,
5% density value site, as shown in three larger dots on Fig. 1, shadow, middle tone and the bloom of correspondence image, avoid respectively
Before only measured 100% density value and occur going back virgin curve situation fluctuated, taken into account the control of shadow, middle tone and bloom
System.
When specific operation, the density color lump formed from 100%, 50%, 5% 3 kind of stratum reticulare is made, as shown in Figure 2.This reality
It applies in example, density color lump size is the square of 5mm × 5mm, or according to actual conditions and measuring instrument (such as light splitting density
Instrument) pore size determine density color lump size.
As shown in figure 3, being CMYK density color lump combination diagrams.CMYK density color lumps combination include K (black) 100%,
50%, 5%, C (indigo plant) 100%, 50%, 5%, M (red) 100%, 50%, 5%, Y (Huang) 100%, 50%, 5%, it is contemplated that recessed
Version printing transparent material is more, increases white version in group, and when printing needs chromatography, and when measurement need to print white version and measure.
As shown in figure 4, for CMYK density color lumps combination 33 to be placed on to the position view in intaglio process brush material.Put position
In 31 side of intaglio printing mark line, 32 lower section of mark's line side chromatography cross hairs.In Fig. 3,34 indicate intaglio printing base material, 31 tables
Show intaglio printing range.Certainly, the positional distance of CMYK density color lump combination 33 can be adjusted according to the parameter of different machines.
After machine under printing, directly measure the density of CMYK density color lump per three points of color, by the density value surveyed with
Standard value compares, if in range of tolerable variance, comes whether interpretation reaches requirement per color.The direction for judging color is to increase color
Or reduce color；It also can determine whether middle tone and shallow net reach standard simultaneously, if need to increase density, it is desired nonetheless to adjust
Full page roller.
Standard sample is made by constantly adjusting by the above method.
Step 4：Plate-making Copy Preparation
Plate-making factory obtains ICC (international color consortium) color characteristic files and standard color curve according to standard sample, according to
ICC color characteristic files and the plate-making Copy Preparation of standard color curve.
Control method provided in this embodiment avoids the subjectivity for being visually observed judgement.The color management hand used
Section can be such that most of printing machines are made in the case where meeting standard conditions.Using a simple, general desired value, make to sentence
It is disconnected to become simple and clear.
Claims (7)
1. a kind of intaglio-printed image method of quality control, which is characterized in that step is：
Step 1：Make CMYK contrast colour atlas
CMYK contrast colour atlas be indigo plant C, red M, Huang Y, tetra- color inks of black K distinguish from shallow to deep, concentration is caused by 0%-100%
The presentation of different color；
Step 2：The printing test of CMYK contrast colour atlas
CMYK contrasts colour atla is subjected to printing test on the printer, determines that ink uses producer, determines printing technology parameter, really
The solid density and dot gain rate tolerance for determining CMYK standards ensure that dot gain is being marked by computer experiment several times
In accurate range of tolerable variance, 0%-100% stratum reticulare density values, that is, color rendition curve are measured；
Step 3：Make standard sample
Beta version is done with obtained color rendition curve, after repeated multiple times, obtains stable color rendition curve；From stable
Three points are taken to control image on color rendition curve, shadow, middle tone and the bloom of three point difference correspondence images；
The CMYK of image is controlled per color by above three point, and the density value that three points are measured is compared with standard value, if accidentally
Difference illustrates to reach requirement in range of tolerable variance；If error not in range of tolerable variance, illustrates not up to require, then is adjusted,
Until reaching requirement, standard sample is made；
Step 4：Plate-making Copy Preparation
Plate-making factory obtains international color consortium ICC color characteristic files and standard color curve according to standard sample, according to ICC colors
Characteristic file and the plate-making Copy Preparation of standard color curve.
2. a kind of intaglio-printed image method of quality control as described in claim 1, it is characterised in that：It is right in the step 3
Three points of the shadow of image, middle tone and bloom are answered to be respectively：100% density value, 50% density value, 5% density value site.
3. a kind of intaglio-printed image method of quality control as claimed in claim 1 or 2, it is characterised in that：The step 3
In, CMYK is made per color for controlling the density color lump of low key tone, density color lump for controlling middle tone, bright for controlling
The density color lump of tune, and be arranged in order, form the combination of CMYK density color lumps；The combination of CMYK density color lumps is placed on intaglio process brush material
In appropriate location.
4. a kind of intaglio-printed image method of quality control as claimed in claim 3, it is characterised in that：It is described dark for controlling
The density color lump of tone is the density color lump that net is 100% at number.
5. a kind of intaglio-printed image method of quality control as claimed in claim 3, it is characterised in that：It is described to be used in control
Between the density color lump adjusted be density color lump that net is 50% at number.
6. a kind of intaglio-printed image method of quality control as claimed in claim 3, it is characterised in that：It is described bright for controlling
The density color lump of tune is the density color lump that net is 5% at number.
7. a kind of intaglio-printed image method of quality control as claimed in claim 3, it is characterised in that：The CMYK density color
The position that block combination is placed in intaglio process brush material is：Intaglio printing mark line (31) side, mark's line side chromatography cross hairs (32)
Lower section.
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| 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 |
| CN107796773A (en) * | 2017-11-30 | 2018-03-13 | 上海紫江彩印包装有限公司 | A kind of control method of intaglio printing spot color half tone image quality |
| CN110385922A (en) * | 2018-04-18 | 2019-10-29 | 深圳市科彩印务有限公司 | A kind of printing process of pre-adjustment offset printing color difference |
| CN109949379B (en) * | 2019-03-27 | 2021-06-18 | 深圳市汉森软件有限公司 | Color-tracing method, device, equipment and storage medium for ink-jet printer |
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| CN1227568C (en) * | 2003-04-30 | 2005-11-16 | 上海龙樱彩色制版有限公司 | Colour management method in digital proofing |
| JP4495068B2 (en) * | 2005-11-14 | 2010-06-30 | 三菱重工業株式会社 | Print management system, method and program |
| CN101518980B (en) * | 2008-12-30 | 2010-09-15 | 武汉大学 | Printing color quality detecting method of integrating visual measurement, density measurement and color measurement |
| CN103358684A (en) * | 2012-03-27 | 2013-10-23 | 上海运申制版模具有限公司 | Manuscript printing quality control method for spot-color ICC (international color consortium) curve proofing |
| EP2746049A1 (en) * | 2012-12-20 | 2014-06-25 | KBA-NotaSys SA | Method for monitoring intaglio printing and corresponding colour control patches |
| CN103978783B (en) * | 2014-05-31 | 2015-11-11 | 齐鲁工业大学 | A kind of control method for electrostatic digital printed site contrast |
| CN105787945B (en) * | 2016-03-09 | 2018-05-22 | 杭州万事利丝绸科技有限公司 | A kind of evaluation method of the digit printing color reproduction accuracy of feature based color |
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Denomination of invention: An image quality control method for gravure printing Effective date of registration: 20220308 Granted publication date: 20180731 Pledgee: Industrial and Commercial Bank of China Limited Shanghai Putuo sub branch Pledgor: SHANGHAI ZIJIANG COLOUR PRINTING & PACKAGING Co.,Ltd. Registration number: Y2022980002284 |
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