CN106739484B - A method of prediction printed matter drying process color change - Google Patents
A method of prediction printed matter drying process color change Download PDFInfo
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- CN106739484B CN106739484B CN201611041646.XA CN201611041646A CN106739484B CN 106739484 B CN106739484 B CN 106739484B CN 201611041646 A CN201611041646 A CN 201611041646A CN 106739484 B CN106739484 B CN 106739484B
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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
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
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- Spectrometry And Color Measurement (AREA)
Abstract
The invention discloses a kind of methods for predicting printed matter drying process color change, method of the invention is for a kind of paper and ink combination, the method drawn a design first with color spreading instrument, spectral reflectivity of the color lump under dry, wet two states on batten is detected, establishes mapping relations using least square method linear fit；After printing paper printing ink combination, the spectral reflectivity of color lump on the spot is detected under wet condition, calculates the spectral reflectivity under dry state according to mapping relations, then calculate chromatic value and density value.The present invention solves in printing process, it is detected color lump and is in wet condition, printing worker can not chromatic value and density value convenient, after accurately prediction color lump is dry, therefore can not accurately adjust ink amount make it is dry after process color be near the mark as far as possible or the problem of customer requirement.
Description
Technical field
The present invention relates to printing process quality testing and control technology fields, after paper printing ink,
The prediction technique of ink color change as caused by wet exsiccation.
Background technique
In order to control the colour reproduction effect of printed matter, a kind of paper printing ink is combined, printing worker needs to adjust ink
Measure size, make on the paper under drying regime on the spot the color of color lump keep spot color color most as close possible to the requirement of reference colour angle value
It may be close to the chromatic value requirement that client specifies or the specimen page color that client specifies.A kind of side in order to facilitate use, as substitution
Method, production specification or customer requirement worker measure sometimes by adjusting ink requires the density value of color lump on the spot on paper close to specified.
However, ink setting is the slow process of comparison, ink when printing worker inspects specimen page by random samples in process of production
Also in wet state, and ink can occur significantly to change from the color of the process layer of ink of wet exsiccation, corresponding chromatic value and
Density value also changes.Printing worker needs according to after chromatic value and density value the prediction drying detected under wet condition
Chromatic value and density value, then output ink quantity is adjusted, require predicted value close to specified as far as possible, therefore ink setting process color becomes
That changes predicts whether accurately there is important influence to printing quality control.
A kind of existing method is that polariscope is added on detecting instrument, and the densitometer with polariscope detects same color lump
Density value under wet, dry two states is essentially identical, however the density value that detects of the densitometer with polariscope with without
The density value of polariscope is different, and does not meet standard requirements with the chromatic value detected under the conditions of polariscope.It is existing another
Kind of method is the density contrast that a kind of paper printing ink combination is determined by experiment in certain ink layer thickness, under the conditions of doing, being two kinds wet
It is different；In printing process, by the color lump density under detection wet condition, the density under dry state is predicted according to dry and wet density contrast
Value, but in printing process ink layer thickness be it is uncertain, dry and wet density contrast is also different, according to same density contrast go compensation exist
Large error.
Summary of the invention
The technical problems to be solved by the present invention are: in printing process, be detected color lump and be in wet condition, printing worker without
Chromatic value and density value after method is convenient, accurately to predict the color lump dry, therefore can not accurately adjust ink amount and make drying
Process color afterwards is near the mark as far as possible or customer requirement.
For above-mentioned actual conditions, propose a kind of first to establish a kind of paper printing ink combination spectrum under dry, wet two states
The relation function of reflectivity, spectral reflectivity when printing by detection ink under wet condition, calculates dry according to relation function
Spectral reflectivity under state, then calculate L*a*b*Value and density value, drying can not accurately be predicted by solving detection wet condition color lump
Afterwards the problem of color.
Method of the invention is a kind of method drawn a design first with color spreading instrument for paper and ink combination, is established dry, wet
The relation function of the spectral reflectivity of two states；After printing paper printing ink combination, color lump on the spot is detected under wet condition
Spectral reflectivity calculates the spectral reflectivity under dry state according to relation function, then calculates chromatic value and density value.Specific packet
Include following steps:
Combination of the step (1) for a kind of paper and ink, by printing ink layer thickness of the ink on the paper
It is required that using color spreading instrument carry out mass colour draw a design, mass colour be considered as in 5 minutes after drawing a design ink be in it is wet in the state of, detect batten
The spectral reflectivity of upper color lump is distributed ρ0, the printing ink layer thickness requirement is 0.75~1.5 micron；
After step (2) waits 24 hours, that is, it is considered as drying regime, again color lump on batten described in detecting step (1)
Spectral reflectivity is distributed ρ0′；
Step (3) is distributed ρ with the spectral reflectivity under wet condition described in step (1)0Each wavelength be λ at spectrum
Reflectivity ρ0(λ) is independent variable, is distributed ρ with the spectral reflectivity under drying regime described in step (2)0' respective wavelength be λ
The spectral reflectivity ρ at place0' (λ) is dependent variable, carries out linear fit using least square method and obtains relation function f；
When step (4) printing machine is printed using paper described in step (1) and ink, in printing process, detection
The spectral reflectivity of color lump on the spot under wet condition is distributed ρ, and each wavelength with ρ is that the spectral reflectivity ρ (λ) at λ is
Independent variable calculates the spectral reflectivity ρ ' (λ) under drying regime, by each wavelength using step (3) the relation function f
Spectral reflectivity ρ ' (λ) composition color lump spectral reflectivity in the dry state is distributed ρ ' on the spot, then calculate L*a*b*It is worth and close
Angle value.Wherein L*a*b*The CIE 1976L that Zhi Zhi International Commission on Illumination is recommended*a*b*The color coordinate values in space calculate L*a*b*
Value is using mature technology, such as GB/T 19437-2004.Wherein density value refers to that iso standard feux rouges density, iso standard green light are close
Degree, iso standard blue light density or visual density calculate density value using mature technology, such as GB/T23649-2009.
Beneficial effects of the present invention: combining same paper printing ink, in different ink layer thicknesses, does, wet two states
Lower density variation, coloration variation are different, but the spectral reflectivity at each wavelength keeps good linear relationship, therefore institute of the present invention
The method stated need to only detect the spectral reflectivity distribution of color lump under wet condition, can not only obtain chromatic value under wet condition, close
Angle value, moreover it is possible to chromatic value and density value after accurately predicting drying.It is not only high-efficient compared to existing method, but also
Forecasting accuracy is good, facilitates the correct control of print color.
Detailed description of the invention
Fig. 1 is the method implementation flow chart of prediction printed matter drying process color change of the invention
Specific embodiment
The present invention is further described in detail with reference to the accompanying drawings and embodiments.
For a kind of given paper printing ink combination, printing worker needs to adjust ink amount, the mass colour on printed sheet is made to meet mark
The color requirement that quasi- specification or client specify.However what standard criterion or client specified is that the color of ink in the dry state is wanted
Ask, and worker can only detect the color lump under wet condition during print production, it is therefore desirable to it is a kind of can be easily and accurately sharp
The method of the color performance under state is done with the prediction of result detected under wet condition.
Same paper printing ink is combined, in different ink layer thicknesses, is done, the variation of wet two states lower density, coloration change
Change difference, but spectral reflectivity keeps good linear relationship, therefore a kind of prediction printed matter drying process proposed by the present invention
A kind of method of color change, for paper and ink combination, first with color spreading instrument according to certain layer of ink degree requirement, production oil
Mass colour sample detects the spectral reflectivity distribution of tinctorial pattern under wet condition, after ink setting, then detects the spectral reflectance under dry state
The relation function of the spectral reflectivity under dry, wet two states is established in rate distribution；After printing the paper printing ink combination, utilize
The spectral reflectivity of the printed sheet color lump of the wet condition detected, the spectral reflectivity of dry state is calculated according to relation function, then is counted
It calculates chromatic value and density value, implementing procedure is as shown in Figure 1.The method of the invention the following steps are included:
A kind of combination of the step (1) for paper and ink, by close to the ink on the paper printing
Ink layer thickness requirement, for example, paper is art paper, when ink is offset gloss ink, green ink thickness is about 0.85 micron, pinkish red
Color ink thickness is about 1.0 microns, yellow ink thickness is about 1.5 microns, black ink thickness is about 0.75 micron, using color spreading instrument into
Row ink colors are drawn a design, mass colour be considered as in 5 minutes after drawing a design ink be in it is wet in the state of, detect batten on color lump spectrum it is anti-
Penetrate rate distribution ρ0；
After step (2) waits 24 hours, that is, it is considered as drying regime, color lump exists on batten described in detecting step (1) again
Spectral reflectivity under drying regime is distributed ρ0′；
Step (3) is distributed ρ with the spectral reflectivity under wet condition described in step (1)0Each wavelength is that the spectrum at λ is anti-
Penetrate rate ρ0(λ) is independent variable, and the spectral reflectivity detected is distributed locating wave-length coverage and interval depends on instrument itself, such as beauty
The wave-length coverage of 528 Spectrodensiotometer of Ai Seli of state's production is 400nm to 700nm, 10nm is divided into, described in step (2)
Drying regime under spectral reflectivity be distributed ρ0' corresponding wavelength is the spectral reflectivity ρ at λ0' (λ) is dependent variable, using most
Small square law linear fit obtains relation function f, and described carries out linear fit using least square method as well-known technique；
When step (4) printing machine is printed using paper described in step (1) and ink, in printing process, detection
The spectral reflectivity of color lump on the spot on printed sheet in wet condition is distributed ρ, is the spectral reflectivity ρ (λ) at λ with each wavelength of ρ
The spectral reflectivity ρ ' (λ) under drying regime is calculated, by each wavelength using step (3) the relation function f for independent variable
Spectral power distribution ρ ' is formed for the spectral reflectivity ρ ' (λ) at λ, then calculates L*a*b*And density value.Utilize the spectrum of object color
Reflectivity distribution calculates L*a*b*Value has mature technology, shown in calculation method such as formula (1)-(14).
X=K ∑ (S (λ) ρ ' (λ) x2) (2)
Y=K ∑ (S (λ) ρ ' (λ) y2) (3)
Z=K ∑ (S (λ) ρ ' (λ) z2) (4)
Wherein S (λ) indicates the spectral power distribution of D50 standard illuminants, and ρ ' (λ) indicates that wavelength is the spectral reflectance at λ
Rate, x2、y2、z2Indicating 1931 standard colorimetric observer's spectral tristimulus value of CIE as defined in International Commission on Illumination, K is coefficient,
X, Y, Z indicate XYZ value of the color lump under standard illuminants in test chart.Wherein Xe、Ye、ZeIndicate the XYZ value of white field, L*、a*、b*
Respectively indicate L*a*b*L in value*Value, a*Value, b*Value.
When
When
When
When
When
When
Calculating density value using the spectral reflectivity of object color has mature technology, shown in calculation method such as formula (15).
Wherein D is the density value of object, ΠλExpression wavelength is the corresponding spectrum product of λ, according to selected responsive state
With the difference of simulation colour filter, feux rouges density spectra product is selected when calculating feux rouges density, selects green light when calculating green light density
Density spectra product selects blue light density spectra product when calculating blue light density, visual density light is selected when computation vision density
Product is composed, iso standard has defined ΠλValue, can find from existing data.
Claims (1)
1. a kind of method for predicting printed matter drying process color change, it is characterised in that: the following steps are included:
A kind of combination of the step (1) for paper and ink, by printing ink layer thickness requirement of the ink on the paper,
Using color spreading instrument carry out mass colour draw a design, mass colour be considered as in 5 minutes after drawing a design ink be in it is wet in the state of, detect batten on color lump
Spectral reflectivity be distributed ρ0, the printing ink layer thickness requirement is 0.75~1.5 micron；
Step (2) wait 24 hours after, that is, be considered as drying regime, again on batten described in detecting step (1) color lump spectrum
Reflectivity distribution ρ '0；
Step (3) is distributed ρ with the spectral reflectivity under wet condition described in step (1)0Each wavelength be λ at spectral reflectance
Rate ρ0(λ) is independent variable, is distributed ρ ' with the spectral reflectivity under drying regime described in step (2)0Respective wavelength be λ at
Spectral reflectivity ρ '0(λ) is dependent variable, carries out linear fit using least square method and obtains relation function f；
When step (4) printing machine is printed using paper described in step (1) and ink, in printing process, detection is in
The spectral reflectivity of color lump on the spot under wet condition is distributed ρ, and each wavelength with ρ is that the spectral reflectivity ρ (λ) at λ is from change
Amount calculates the spectral reflectivity ρ ' (λ) under drying regime, by the light of each wavelength using step (3) the relation function f
Composing reflectivity ρ ' (λ) composition, the spectral reflectivity of color lump in the dry state is distributed ρ ' on the spot, then calculates L*a*b*Value and density
Value；Wherein L*a*b*The CIE 1976L that Zhi Zhi International Commission on Illumination is recommended*a*b*The color coordinate values in space.
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| CN113484193A (en) * | 2021-07-09 | 2021-10-08 | 深圳市裕同包装科技股份有限公司 | Detection method of printing ink |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1479675A (en) * | 2000-12-06 | 2004-03-03 | �������ʱ����칫˾ | Spectral color control method |
| JP2004251848A (en) * | 2003-02-21 | 2004-09-09 | Mitsubishi Heavy Ind Ltd | Color tone controlling device of printer |
| CN1950208A (en) * | 2004-05-03 | 2007-04-18 | 海德堡印刷机械股份公司 | Method for determining colour values and/or density values, and printing device for implementing said method |
| DE102007008640A1 (en) * | 2006-03-24 | 2007-09-27 | Heidelberger Druckmaschinen Ag | Wet color measured values converting method for e.g. sheet rotation printing machine, involves adding correction vector to wet color measured values for determining corresponding dry color measured values |
| CN101604151A (en) * | 2009-06-29 | 2009-12-16 | 杭州电子科技大学 | A kind of detection control method that is used for printing color |
| CN104835124A (en) * | 2015-05-08 | 2015-08-12 | 中南大学 | Foam image color correction method based on spectrum information fusion and device thereof |
-
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1479675A (en) * | 2000-12-06 | 2004-03-03 | �������ʱ����칫˾ | Spectral color control method |
| JP2004251848A (en) * | 2003-02-21 | 2004-09-09 | Mitsubishi Heavy Ind Ltd | Color tone controlling device of printer |
| CN1950208A (en) * | 2004-05-03 | 2007-04-18 | 海德堡印刷机械股份公司 | Method for determining colour values and/or density values, and printing device for implementing said method |
| DE102007008640A1 (en) * | 2006-03-24 | 2007-09-27 | Heidelberger Druckmaschinen Ag | Wet color measured values converting method for e.g. sheet rotation printing machine, involves adding correction vector to wet color measured values for determining corresponding dry color measured values |
| CN101604151A (en) * | 2009-06-29 | 2009-12-16 | 杭州电子科技大学 | A kind of detection control method that is used for printing color |
| CN104835124A (en) * | 2015-05-08 | 2015-08-12 | 中南大学 | Foam image color correction method based on spectrum information fusion and device thereof |
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Effective date of registration: 20191115 Address after: 510530 room 1923, building 3, Ruifeng center, Kaichuang Avenue, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Guangzhou bud rice Intellectual Property Service Co., Ltd. Address before: Hangzhou City, Zhejiang province 310018 Xiasha Higher Education Park No. 2 street Patentee before: Hangzhou Electronic Science and Technology Univ |
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Effective date of registration: 20191210 Address after: 322000 No.522, Tongshan Road, phase II, Gutang Industrial Zone, Yiting Town, Yiwu City, Jinhua City, Zhejiang Province (self declaration) Patentee after: Zhejiang Haipai Packaging Technology Co., Ltd Address before: 510530 room 1923, building 3, Ruifeng center, Kaichuang Avenue, Huangpu District, Guangzhou City, Guangdong Province Patentee before: Guangzhou bud rice Intellectual Property Service Co., Ltd. |