CN107796773A - A kind of control method of intaglio printing spot color half tone image quality - Google Patents
A kind of control method of intaglio printing spot color half tone image quality Download PDFInfo
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- CN107796773A CN107796773A CN201711243935.2A CN201711243935A CN107796773A CN 107796773 A CN107796773 A CN 107796773A CN 201711243935 A CN201711243935 A CN 201711243935A CN 107796773 A CN107796773 A CN 107796773A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/93—Detection standards; Calibrating baseline adjustment, drift correction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
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Abstract
The present invention relates to a kind of control method of intaglio printing spot color half tone image quality, comprise the following steps：(1) monochromatic contrast colour atla is made, to Min DG and the Max DG of typical mesh point sets standard；(2) monochromatic contrast colour atla is subjected to printing test on the printer；(3) corresponding dot gain value is calculated with Murray Davis formula, ensures that it between Min DG and Max DG, obtains TVI curves and color rendition curve；Make the standard sample of monotone pattern so that the dot gain value of its typical site is between Min DG and Max DG；(4) international color consortium ICC color characteristic files and standard restoration curve are obtained according to standard sample, Copy Preparation of making a plate.This method directly carving on printing plate, without other costs, can judge simply, to improve the accuracy and standard of intaglio printing half tone image quality control in engraving.
Description
Technical field
The present invention relates to gravure application field, more particularly to a kind of control of intaglio printing spot color half tone image quality
Method processed.
Background technology
Halftoning typically refer on the printed matter after special processing from shallow to deep by light to dense change, be by net
Point size forms to show.On printed matter picture, color and it is deep or light be to be represented by the size of site.Seeing
When examining printed picture, dot area is big, and color is just deep；Dot area is small, and color is with regard to shallow.At present, to halftone pattern in other words
Spot color linked network pattern, generally only controls color on the spot, and remaining accurate on the spot shallow net does not just control, due to the shadow in printing process
Ring, dot gain does not avoid, and rational site increase helps to obtain stable printing quality, so site must be grasped
Expand allow range with avoid vision present on difference.Meanwhile spot color only control on the spot color be it is inadequate, simultaneously
The color of middle tone must be controlled.
Briefly, the purpose of half tone image control is uncontrolled in order to solve different dot gains and spot color formula
System brings different visual effects.Can be described as dot gain control be in rational scope normal distribution with
And spot color color is in controllable state.
So-called dot gain refers to that, when ink is needed on stock from halftoning printing, the presence of pressure makes dot surface
Product increase (generally on the occasion of be in some cases negative value).If during on-line shop's area increase 4~5%, the balance of grey and each color
It can be affected.Site increase includes mechanical site increase and optics site increase.Shadow of the mechanical dot gain by several factors
Ring, for intaglio printing, possible influence factor includes：The viscosity of ink, rubber roller pressure, scraper angle etc..
The calculating of dot area percentage is always to continue to use Murray-Davis formula and Yule-Nielson formula.But due to
The problem of n values are difficult to value be present,《GB/T 17934.1-1999 printing technologies mesh adjusts color separation film, specimen page and printing finished product
Process control part 1》With《GB/T 18722-2002 printing technologies reflection density is measured and colour measurement is being printed
Application in process control》It is middle to calculate dot area percentage using relative density and Murray-Davis formula.
TVI (Tone Value Increase) curve is exactly briefly the involved each contrast site expansion of color in printing
The curve that (DOT GAIN) is linked to be greatly.Due to the influence in printing process, dot gain is inevitable, and rational site increases
It is big to help to obtain stable printing quality, so the range of dot gain permission must be grasped.In traditional printing, typically
Middle tone is controlled in 11-20% or so.The abscissa of dot gain curve is the site percentage of printing plate, and ordinate is in printing
Respective point at dot gain value.
Spot color only control on the spot color be inadequate, while color on the spot is measured measure 50% among numerical value.
To sum up, existing spot color half tone image control method, only controls the color located on the spot, does not control the face of middle tone
Color；When shade and shallow net, middle tone are inconsistent, it is difficult to judge to make a plate site, color matching or printing the problem of, it is necessary to
Go to judge by experience, it is subjective, it can not seek unity of standard, method accuracy is inadequate.
The content of the invention
In view of problems of the prior art, an object of the present invention is to improve intaglio printing spot color half-tone picture
As the accuracy of quality control, standard and stability.
To be adopted the following technical scheme that up to this purpose, the present invention：
A kind of control method of intaglio printing spot color half tone image quality, comprises the following steps：
(1) monochromatic contrast colour atla is made, the dot gain minimum M in DG of typical mesh point sets standard and site are expanded
Big maximum Max DG；Wherein, the typical site includes shadow site, middle tone site and bloom site；
(2) monochromatic contrast colour atla printing test：Using black as the test ink of standard, by monochromatic contrast color obtained by (1)
It is stuck on printing machine and carries out printing test, tests the dot density and field density of typical site；
(3) standard sample is made：Corresponding dot gain value is calculated with Murray-Davis formula, ensures gained dot gain value
Between Min DG and Max DG, TVI curves and color rendition curve are obtained；Make the standard sample of monotone pattern so that
The dot gain value of its typical site is between Min DG and Max DG；
(4) plate-making Copy Preparation：The standard sample according to obtained by (3) obtains international color consortium ICC color characteristic files and standard also
Virgin curve, according to ICC color characteristic files and the plate-making Copy Preparation of standard color curve.
Preferably, step (1) the shadow site includes net point net turns into 60 as 90~100% site and net point net
~85% site.
Preferably, step (1) the middle tone site includes the site that net point net turns into 20~55%.
Preferably, step (1) the bloom site includes the site that net point net turns into 3~10%.
Preferably, the net point net of step (1) the typical site is into including 100%, 75%, 50%, 25% and 5%.It is right
Three points for answering the shadow of image, middle tone and bloom are respectively：75% dot gain value, 50% dot gain value, 5% density
Value expands site.Shadow, middle tone and the bloom (upper four points for being derived from TVI curves) of the control halftone pattern passed through, cover
The whole level of image control has been covered, has avoided and occurs TVI curves situation fluctuated when conventional method only controls at one, take into account
The control of shadow, middle tone and bloom, by three levels controls between Min DG and the Max DG.
Preferably, the tone of step (3) Plays sample is controlled by the way that spot color density color lump is placed in intaglio process brush material.
Preferably, the spot color density color lump include be arranged in order low key tone density color lump, middle tone density color lump and
High light density color lump.
Preferably, the low key tone density color lump include net point net as 100% density color lump and net point net into 75%
Density color lump.
Preferably, the middle tone density color lump includes the density color lump that net point net turns into 50%.
Preferably, the high light density color lump includes the density color lump that net point net turns into 5%.
Preferably, the spot color density color lump is placed on the position in intaglio process brush material, is easy to survey in real time during machine under printed material
The expansion of amount monitoring site, while do not influence normally to print chromatography.
For：Intaglio printing mark's line side, mark's line side chromatography cross hairs lower section.
The method of the invention, when printing signed-off sample, first adjusting spot color, until accurate, recording ink matches simultaneously color on the spot
Measure density color lump 100%Lab and 50% at Lab values, as next time print when foundation, while measurement 75%, 50%,
25%th, the dot gain at 5%, if qualified if being considered as if between Min DG and Max DG two-lines.If not examined if
It is whether accurate and then adjust printing parameter according to actual conditions to look into printing parameter, if can't accurate dot gain version if up to standard
Roller needs to do over again.
During secondary printing, printing oil proportion allotment when printing oil proportion strictly presses the first printing, while according to printing first
When the standard of spot color 100% and 50% Lab, to measure the aberration at 100% and 50%, △ Ecmc are required at 100%<1.0
△ Ecmc are required at 50%<1.5.
Compared with prior art, the present invention at least has the advantages that：
Method provided by the invention overcomes the deficiencies in the prior art, adds the control point of middle tone and shallow net, can be
Directly carving is on printing plate during engraving, without other costs；After the lower machine of printing, the △ of direct measurement dot gain data and color
E values, which can be known whether, reaches requirement.It is operable by simple training, avoids subjectivity and dependence that Conventional visual sees sample
Personal micro-judgment and training excessive cycle.Method provided by the invention, judge simple, easily operated, intaglio printing half
The accuracy and standard of tone images quality control improve more than 80%.
Brief description of the drawings
Fig. 1 is color density also virgin curve；
Fig. 2 is monochromatic card schematic diagram；
Fig. 3 is spot color density color lump combination diagram；
Fig. 4 is the position view that the combination of spot color density color lump is placed in intaglio process brush material
Mark is illustrated as in Fig. 4：51- intaglio printing mark's lines, 52- mark's line side chromatography cross hairs, 53- spot color density colors
Block combines, 54- intaglio printing base materials, the effective range of 55- printings
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.But following reality
The simple example that example is only the present invention is applied, does not represent or limit the scope of the present invention, protection model of the invention
Enclose and be defined by claims.
Embodiment 1
A kind of intaglio-printed image method of quality control, comprises the following steps：
Step 1：The monochromatic colour atla in the range of the dot gain of K standards is made, as shown in Fig. 2 by net into 0~100% institute
The presentation of caused different color.As shown in table 1, to the dot gain minimum M in DG of typical mesh point sets standard and site
It is standard dot gain to expand maximum Max DG, Tatget Dot Gain, Tolerance:It is +/- to spread tolerance for site.
Table 1
Step 2：The printing test of K colour atlas dot gain：
Monochromatic colour atla is subjected to printing test with tusche on the printer, now it needs to be determined that ink uses producer, it is determined that
Typography parameter, by computer experiment several times, dot gain measures simultaneously between Min DG and Max DG two-lines
0~100% stratum reticulare density value, that is, color density also virgin curve, as shown in Figure 1.
Step 3：Make standard sample
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.Three points are taken to carry out control figure from stable color rendition curve
Picture, respectively 100%, 75%, 50%, 5% site, respectively correspondence image shadow, middle tone and bloom, taken into account shadow,
The control of middle tone and bloom.
During concrete operations, the density color lump formed from 100%, 75%, 50%, 5% 3 kind of stratum reticulare is made, as shown in Figure 3.
In the present embodiment, density color lump size is 5mm × 5mm square, or (is such as divided close according to actual conditions and measuring instrument
Degree instrument) pore size determine density color lump size.
As shown in figure 3, it is spot color density color lump combination diagram.100%th, 75%, 50%, 5%, it is contemplated that intaglio printing
Transparent material is more, adds white version in group, needs chromatography during printing, need to print white version measurement during measurement.
As shown in figure 4, for the combination of spot color density color lump to be placed on to the position view in intaglio process brush material.Put position exists
The side of intaglio printing mark line 51, the lower section of mark's line side chromatography cross hairs 52.In Fig. 4,54 represent intaglio printing base material, and 55 represent
The effective range of printing.The positional distance of certain spot color density color lump combination 53 can be adjusted according to the parameter of different machines.
After machine under printing, first adjust the color of spot color and record at the Lab values and 50% at spot color proportioning and 100%
Lab values, then measure the dot gain value of density color lump per four points of color, the dot gain value surveyed whether Min DG with
Between Max DG two-lines, whether the dot gain for carrying out interpretation color reaches requirement.It also can determine whether that middle tone and shallow net are simultaneously
It is no to reach standard, if to need to adjust printing parameter, it is desired nonetheless to adjust roller.
During secondary printing, matched colors according to the printing oil proportion printed first, at Lab and 50% at the spot color 100% of record
Lab values color standard input spectrophotometric color measurement instrument, the color at 100% is first measured after lower machine, then measure the Lab values at 50%,
Ask and △ Ecmc are required at 100%<1.0, △ Ecmc are required at 100%<1.5, color measures dot gain value after reaching requirement, is
It is no between Min DG and Max DG two-lines.
Embodiment 2
Step is same as Example 1, unlike, the site of Selection of Net Points 100%, 60%, 20%, 3% of step 3.
Embodiment 3
Step is same as Example 1, unlike, the site of Selection of Net Points 100%, 85%, 55%, 10% of step 3.
Embodiment 4
Step is same as Example 1, unlike, the site of Selection of Net Points 96%, 70%, 35%, 8%, 4% of step 3.
Embodiment 5
Step is same as Example 1, unlike, the Selection of Net Points 100% of step 3,95%, 80%, 70%, 55%,
25%th, 10%, 5%, 2% site.
Method provided in an embodiment of the present invention adds the control point of middle tone and shallow net for halftone pattern, while
The color control of 100% site on the spot and the site of middle tone 50% is added when printing again, it is ensured that on the spot and shallow per batch
Net color it is correct.It can directly be carved in engraving on printing plate, without other costs, overcome the deficiencies in the prior art；Printing
After lower machine, direct measurement, which can be known whether, reaches requirement, avoids the subjectivity that Conventional visual sees sample.And judge simply, easily
In operation, the accuracy and standard of intaglio printing half tone image quality control improve more than 80%.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of control method of intaglio printing spot color half tone image quality, it is characterised in that comprise the following steps：
(1) monochromatic contrast colour atla is made, to the dot gain minimum M in DG and dot gain of typical mesh point sets standard most
Big value Max DG；Wherein, the typical site includes shadow site, middle tone site and bloom site；
(2) monochromatic contrast colour atla printing test：Using black as the test ink of standard, by monochromatic contrast color obtained by step (1)
It is stuck on printing machine and carries out printing test, tests the dot density and field density of typical site；
(3) standard sample is made：Corresponding dot gain value is calculated with Murray-Davis formula, ensures that gained dot gain value exists
Between Min DG and Max DG, TVI curves and color rendition curve are obtained；Make the standard sample of monotone pattern so that its
The dot gain value of typical site is between Min DG and Max DG；
(4) plate-making Copy Preparation：The standard sample according to obtained by step (3) obtains international color consortium ICC color characteristic files and standard also
Virgin curve, according to ICC color characteristic files and the plate-making Copy Preparation of standard color curve.
2. the method as described in claim 1, it is characterised in that step (1) the shadow site include net point net turn into 90~
100% site and net point net turn into 60~85% site.
3. method as claimed in claim 1 or 2, it is characterised in that step (1) the middle tone site turns into including net point net
20~55% site；
Preferably, step (1) the bloom site includes the site that net point net turns into 3~10%.
4. the method as described in any one of claims 1 to 3, it is characterised in that step (1) the typical net point net into including
100%th, 75%, 50%, 25% and 5%.
5. the method as described in any one of Claims 1 to 4, it is characterised in that the tone of step (3) Plays sample passes through specially
Color density color lump is placed in intaglio process brush material and controlled.
6. method as claimed in claim 5, it is characterised in that the low key tone that the spot color density color lump includes being arranged in order is close
Spend color lump, middle tone density color lump and high light density color lump.
7. method as claimed in claim 6, it is characterised in that the low key tone density color lump, which includes net point net, turns into 100%
Density color lump and net point net turn into 75% density color lump.
8. method as claimed in claim 6, it is characterised in that the middle tone density color lump includes net point net as 50%
Density color lump.
9. method as claimed in claim 6, it is characterised in that the high light density color lump include net point net as 5% it is close
Spend color lump.
10. the method as described in any one of claim 5~9, it is characterised in that the spot color density color lump is placed on intaglio printing
Position in material is：Intaglio printing mark's line side, mark's line side chromatography cross hairs lower section.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270089A (en) * | 2018-10-31 | 2019-01-25 | 杭州智数创联科技有限公司 | A kind of method of quick obtaining halftone paper printing dot gain |
| JP2020091219A (en) * | 2018-12-06 | 2020-06-11 | 大日本印刷株式会社 | Inspection performance diagnosing device, inspection performance diagnosing method, program for inspection performance diagnosing device, and inspection performance diagnosing system |
| CN112080955A (en) * | 2020-09-30 | 2020-12-15 | 杭州天睿丝绸有限公司 | High-permeability digital jet printing process for dark viscose fabric |
| CN112918074A (en) * | 2021-01-21 | 2021-06-08 | 上海出版印刷高等专科学校 | Correction method for printing equipment |
| CN113500849A (en) * | 2021-06-16 | 2021-10-15 | 广州爱科琪盛塑料有限公司 | Resin plate printing application process |
| CN113776667A (en) * | 2021-09-30 | 2021-12-10 | 杭州日报报业集团盛元印务有限公司 | Offset printing special color ink blending method based on ink LAB value |
| 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 |
| WO2024011659A1 (en) * | 2022-07-15 | 2024-01-18 | 浙江工业大学 | Color density characteristic curve collection method for printing |
| US12075017B2 (en) | 2022-07-15 | 2024-08-27 | Zhejiang University Of Technology | Method for acquiring color density characteristic curve in printing |
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| CN104339838A (en) * | 2014-10-08 | 2015-02-11 | 中山火炬职业技术学院 | Printing quality evaluation and process control method |
| CN106379049A (en) * | 2016-08-30 | 2017-02-08 | 上海紫江彩印包装有限公司 | Gravure printing image quality control method |
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| CN104339838A (en) * | 2014-10-08 | 2015-02-11 | 中山火炬职业技术学院 | Printing quality evaluation and process control method |
| CN106379049A (en) * | 2016-08-30 | 2017-02-08 | 上海紫江彩印包装有限公司 | Gravure printing image quality control method |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270089B (en) * | 2018-10-31 | 2020-11-13 | 杭州智数创联科技有限公司 | Method for rapidly acquiring printing dot enlargement of coated paper |
| CN109270089A (en) * | 2018-10-31 | 2019-01-25 | 杭州智数创联科技有限公司 | A kind of method of quick obtaining halftone paper printing dot gain |
| JP2020091219A (en) * | 2018-12-06 | 2020-06-11 | 大日本印刷株式会社 | Inspection performance diagnosing device, inspection performance diagnosing method, program for inspection performance diagnosing device, and inspection performance diagnosing system |
| JP7268341B2 (en) | 2018-12-06 | 2023-05-08 | 大日本印刷株式会社 | Inspection performance diagnostic device, inspection performance diagnostic method, program for inspection performance diagnostic device, and inspection performance diagnostic system |
| CN112080955B (en) * | 2020-09-30 | 2022-11-18 | 杭州天睿丝绸有限公司 | High-permeability digital jet printing process for dark viscose fabric |
| CN112080955A (en) * | 2020-09-30 | 2020-12-15 | 杭州天睿丝绸有限公司 | High-permeability digital jet printing process for dark viscose fabric |
| CN112918074A (en) * | 2021-01-21 | 2021-06-08 | 上海出版印刷高等专科学校 | Correction method for printing equipment |
| CN113500849B (en) * | 2021-06-16 | 2023-01-17 | 广州爱科琪盛塑料有限公司 | Resin plate printing application process |
| CN113500849A (en) * | 2021-06-16 | 2021-10-15 | 广州爱科琪盛塑料有限公司 | Resin plate printing application process |
| CN113776667A (en) * | 2021-09-30 | 2021-12-10 | 杭州日报报业集团盛元印务有限公司 | Offset printing special color ink blending method based on ink LAB value |
| CN113776667B (en) * | 2021-09-30 | 2024-02-09 | 杭州日报报业集团盛元印务有限公司 | Offset printing spot color ink blending method based on ink LAB value |
| 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 |
| WO2024011659A1 (en) * | 2022-07-15 | 2024-01-18 | 浙江工业大学 | Color density characteristic curve collection method for printing |
| US12075017B2 (en) | 2022-07-15 | 2024-08-27 | Zhejiang University Of Technology | Method for acquiring color density characteristic curve in printing |
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Application publication date: 20180313 |