CN107009734A - Facing paper digital printing Color control and restoring method - Google Patents
Facing paper digital printing Color control and restoring method Download PDFInfo
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- CN107009734A CN107009734A CN201710238106.9A CN201710238106A CN107009734A CN 107009734 A CN107009734 A CN 107009734A CN 201710238106 A CN201710238106 A CN 201710238106A CN 107009734 A CN107009734 A CN 107009734A
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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
- B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply
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- Color, Gradation (AREA)
- Color Image Communication Systems (AREA)
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Abstract
A kind of facing paper digital printing Color control and restoring method, its processing step is：（1）Set up the ICC characteristic files of digital printer；（2）Set up the color environment of standard；（3）Assort color measuring instrument and control instrument；（4）Ensure the accurate of final color and stably；（5）Ensure that display, measurement scan the accurate of color；（6）File made by above-mentioned items is given a name, stored, and is fixed, is formed a whole as the operational data of printed matter also primary standard, and with color control system, it is ensured that the color rendition of most standard specimens.This method can make facing paper digital printing color effect in batch production obtain uniformity duplication, reach the printing effect of What You See Is What You Get.
Description
Technical field
The present invention relates to the control of facing paper digital printing color and reduction technique field, more particularly to facing paper digital printing
Color control and restoring method.
Background technology
With the development and the continuous improvement of people's aesthetic consciousness of decoration industry, consumer wants to facing paper press quality
Ask and also improving constantly, beautiful in colour, lifelike image, the printed matter of access expansion could meet the expectation of people.In print
Brush is towards biometrics today developed rapidly, and the uniformity reduction of color effect is the high-quality mark of digital printing during batch production
Will.
The accuracy of color effects and the key that stability is printing quality, it is a variety of in current facing paper batch prints
Factor affects the aberration of facing paper printing.For example, when decorating printing body paper uses titanium white art printing paper, its technical parameter includes：
Air permeability, ash content, tensile strength, smoothness, color fastness etc., the aberration of body paper will also result in the aberration of printed matter, therefore print
Use with a batch of body paper, for the body paper of different batches, can be in real time supervised during digital printing as much as possible during brush
The change of paper bottom color is surveyed, adjustment color of image is compensated in time in controlled range.
The printing figure message of existing facing paper is generally wood grain, bag and abstract design, and feature is that print amount is big, spot color is more, color
Large area is thick and heavy and the change that has levels, and each spot color has its intrinsic form and aspect.The printing-ink of facing paper is that influence print color is poor
Different main factor, its key technical indexes includes：Heat endurance, viscosity pH value, aberration, content of beary metal etc..It is therein
Heat endurance can cause printing ink transfer and dry difficult and cause aberration problem, viscosity pH value by print speed printing speed, squeegee pressure with
And the influence of the factor such as temperature, and directly affect the effect that site is shifted in printing process.The spot ink of current facing paper industry
Color matching uses Man-made Color Matching mostly, mixes study carefully with standard specimen form and aspect same color, its stability and repeatable not high by rule of thumb
Its reason, essentially consists in and lacks for the digitization for carrying out various color spaces, standardization, the color rendition technology standardized.
The content of the invention
It is an object of the invention to provide a kind of facing paper digital printing Color control and restoring method, this method can make dress
Adorn paper digital printing color effect in batch production and obtain uniformity duplication, reach the printing effect of What You See Is What You Get.
Technical solution proposed by the invention is such：
The processing step of a kind of facing paper digital printing Color control and restoring method, the Color control and restoring method is as follows：
（1）Set up the ICC characteristic files of digital printer
According to specified facing paper printable fabric, IT8 colour code characteristic files of being drawn a design on digital printer, and data are read, build
The characteristic ICC files of vertical digital printer, the colour code is digital standard colour code；
（2）Set up the color environment of standard
The implementation of Color control is required with stable color observation environment first, makes observation original copy color, screen color and print
The effect of brush product color is consistent；
Using standard environment light source, the light source color temperature used by regulation observation sample is 5000K or 6500K, and with higher
Colour rendering index, from ＞ 95% fluorescent tube；
（3）Assort color measuring instrument and control instrument
Using professional color measuring instrument and instrument, it is ensured that the Optimality and stability of measurement quality：
1. spectrophotometer
From i1 spectrophotometers, the colour code in the IT8 normative documents of printing is subjected to color measurements, surveyed using automatic or manual
Amount, after the result of gained is compared with normal data, sets up the Profile ICC files of printing equipment；
2. screen correction instrument
From i1 spectrophotometers, adsorbed on the screen by the sampling head of screen correction instrument, the screen is sampled, if
RGB tri- color ratios example is uneven and when there is colour cast, can be adjusted by software, make up to balance, and set up screen calibration
File；
3. gray scale and colour code
Using the gray scale that uses of facing paper printing of standard, it is differential be set as 100%, 90%, 80%, 70%, 60%,
50%th, 40%, 30%, 20%, 9%, 6%, measured from i1 spectrophotometers, create digital printing double exposure colour code；
（4）Ensure the accurate of final color and stably
Ensure that printing equipment under conditions of normal working condition, the printable fabric of specification and printing-ink, prints IT8 colour codes
File, checks whether pull site is clear, and without dirty trace and drags black phenomenon；
（5）Ensure that display, measurement scan the accurate of color
1. colour temperature is determined, the colour temperature of display is adjusted to 5000K-6000K；
2. gamma value is determined, PC coefficient of combination is adjusted to 2.20, Mac machine coefficients and is adjusted to 1.8；Pass through software and i1 spectrophotometers
To complete；
3. adjustment screen color, the IT8 colour codes in IT8 specimen pages control screen printed with digital printer carry out adjustment, by soft
Part and i1 spectrophotometers are completed, and the colour code in IT8 is passed to screen by software, and i1 spectrophotometers are again by the data of measurement
Computer is returned to, software is compared after correction on this basis, set up the color characteristic file Profile of a standard, led to
Cross Profile to drive display, described Profile color characteristic files are exactly the color space RGB and CIE of display
Transformational relation curve between Lab standard color spaces；
（6）Digital printer ICC characteristic files made by above-mentioned items, screen calibration file, facing paper spot color double exposure is bent
Line, is given a name, is stored, and is fixed, as the operational data of printed matter also primary standard, and is constituted with color control system
One entirety, it is ensured that the color rendition of most standard specimens.
Facing paper digital printing carries out Color control and must comply with a series of defined processes with reduction, could realize expection
Effect, there are three key elements in Color control and reduction process：That is equipment calibration, characterization and color conversion.1st, set
Standby correction
In order to ensure stability, reliability and the sustainability in color information transmittance process, it is desirable to which input equipment, display are set
Standby, output equipment carries out calibration, to ensure that they reach optimum Working.
Input correction：It is exactly brightness to scan input device, contrast, black and white field（The RGB degrees of balance）It is corrected.Example
Such as, the scanner after correction, for a original copy printing equipment, scanning at any time, should all obtain identical figure
As data.
Display correction：The color data for making display be obtained according to pattern proofing data, it is accurate aobvious over the display
Show its color.
Output calibration：Correction to printing machine or proof press, uses the decorative base paper directly printed and printing-ink
The standard compliant printing materials such as the consistent aqueous marking ink of matter.
2nd, device characterization
Digital printer is in color control in color, and the color employed in Lab chrominance space, any equipment is transformed into this
On chrominance space, the matching conversion of color is then carried out.One of core of Color control work is to set up device file, and it makees
It is the bridge of two colour spaces for a standard.Color control system is according to the characterization file of scan input device, by data
The color information that file is transferred to characteristic file calculates space station, further according to output equipment（Display, proof press, printing machine）
Characteristic file, the color information of data file is transferred to the color space of output equipment, so as to ensure color in workflow
The uniformity of coloured silk reduction.These work must all be completed by special computer.
3rd, color conversion
3rd key element of Color control is color conversion, and it is the characteristic file for explanation facilities, and foundation
Device color described by characteristic file carries out the color data conversion of distinct device.One basic principle of color conversion is：
Same color ensures to be still same color on different devices.To reach this purpose it is necessary to have one with equipment without
The color system of pass weighs the color in each equipment, and any one device-dependent color space can be herein
Represented in color space.If device-dependent different colours, the same of this device-independent color space can be corresponded to
Point, then the conversion between them must be just accurate.When carrying out color conversion, color data passes through device characteristics text
Part is first converted to PCS color-values, further according to needing to be converted into the color-values of other equipment.
Compared with prior art, the present invention has following remarkable result：
（1）The engraved data, roller data, proofing data of wood grain version the paper oil different with correspondence are for example decorated according to facing paper
Ink print data information acquisition, carries out the ICC color-control techniques of facing paper spot color conversion, with not using ICC colors to control
What technology was controlled, which draw a design, compares, with incomparable advantage：The mode of drawing a design mixed colours using artificially estimating need by
Toning repeatedly, the process of test print, need to take considerable time and material, and aberration is big, stability is poor, also without every print
The collection of preceding related data, therefore be difficult to simulate actual printing effect, printing also is difficult to the color effects drawn a design with toning
Matching.And the print sample of utilization color-control technique is in actual use, digital printer operating personnel generally feel to be easier to
Simulation, it is the color space transformation skill that spot color color information has been carried out by ICC color managements that this, which is due to that facing paper spot color draws a design,
Art, enables specimen page to meet the requirement of color rendition particularly spot color reduction, and the result of digital printing has foresight, embodies number
According to the advantage changed, standardized, meanwhile, cost of labor is effectively reduced, consumptive material is reduced, optimizes quality, production efficiency is improved.
（2）This facing paper digital printing color is controlled and reduction technique, and its Practical significance is to provide in whole system
A kind of monitoring means in technological process, can be controlled and manage to color transmission in real time in whole printing process, and
Image color can be predicted by color/graphics at each section, so as to intuitively and accurately be adjusted, and made each
Secondary drawing a design has consistent, stable effect.It was verified that its importance is to carry out whole facing paper typography
Digitization is controlled, it is ensured that accuracy, the stability of the high-quality and color rendition of its color.
Embodiment
The present invention is further elaborated by example below.
A kind of processing step of facing paper digital printing Color control and restoring method is as follows：
（1）Set up the ICC characteristic files of digital printer
According to specified facing paper printable fabric, IT8 colour code characteristic files of being drawn a design on digital printer, and data are read, build
The characteristic ICC files of vertical digital printer, the colour code is digital standard colour code；
（2）Set up the color environment of standard
The implementation of Color control is required with stable color observation environment first, makes observation original copy color, screen color and print
The effect of brush product color is consistent；
Using standard environment light source, the light source color temperature used by regulation observation sample is 5000K or 6500K, and with higher
Colour rendering index, from ＞ 95% fluorescent tube；
（3）Assort color measuring instrument and control instrument
Using professional color measuring instrument and instrument, it is ensured that the Optimality and stability of measurement quality：
1. spectrophotometer
From i1 spectrophotometers, the colour code in the IT8 normative documents of printing is subjected to color measurements, surveyed using automatic or manual
Amount, after the result of gained is compared with normal data, sets up the Profile ICC files of printing equipment；
2. screen correction instrument
From i1 spectrophotometers, adsorbed on the screen by the sampling head of screen correction instrument, the screen is sampled, if
RGB tri- color ratios example is uneven and when there is colour cast, can be adjusted by software, make up to balance, and set up screen calibration
File；
3. gray scale and colour code
Using the gray scale that uses of facing paper printing of standard, it is differential be set as 100%, 90%, 80%, 70%, 60%,
50%th, 40%, 30%, 20%, 9%, 6%, measured from i1 spectrophotometers, create digital printing double exposure colour code；
（4）Ensure the accurate of final color and stably
Ensure that printing equipment under conditions of normal working condition, the printable fabric of specification and printing-ink, prints IT8 colour codes
File, checks whether pull site is clear, and without dirty trace and drags black phenomenon；
（5）Ensure that display, measurement scan the accurate of color
1. colour temperature is determined, the colour temperature of display is adjusted to 5000K-6000K；
2. gamma value is determined, PC coefficient of combination is adjusted to 2.20, Mac machine coefficients and is adjusted to 1.8；Pass through software and i1 spectrophotometers
To complete；
3. adjustment screen color, the IT8 colour codes in IT8 specimen pages control screen printed with digital printer carry out adjustment, by soft
Part and i1 spectrophotometers are completed, and the colour code in IT8 is passed to screen by software, and i1 spectrophotometers are again by the data of measurement
Computer is returned to, software is compared after correction on this basis, set up the color characteristic file Profile of a standard, led to
Cross Profile to drive display, described Profile color characteristic files are exactly the color space RGB and CIE of display
Transformational relation curve between Lab standard color spaces；
（6）Digital printer ICC characteristic files made by above-mentioned items, screen calibration file, facing paper spot color double exposure is bent
Line, is given a name, is stored, and is fixed, as the operational data of printed matter also primary standard, and is constituted with color control system
One entirety, it is ensured that the color rendition of most standard specimens.
The mechanism to facing paper digital printing Color control and restoring method is further elaborated below.
The making of digital printing equipment ICC characteristic files
（1）IT8 digital standard colour codes
If making the ICC characteristic files of digital printing equipment, IT8 digital standard colour codes（Hereinafter referred to as colour code）Being must can not
Few.IT8 colour codes are e-files, it is adaptable to make the digital printing equipment of color representation with the colors of CMYK tetra-.
Include 1560 different color blocks altogether in IT8 colour codes.The color data of these color lumps is all cmyk data, each
The CMYK dot area coverages of color lump are different, when different digital printing equipments print to IT8 colour codes, 1560 colors printed out
Coloured silk just represents the color representation ability of the digital printing equipment.The strong equipment of color representation ability can show thin between color lump
Micro- difference；And the difference between the equipment performance color lump of color representation ability is just lacked, the small differences between color lump are just
It can distinguish unclear.The ability of digital printing equipment reproduction IT8 colour codes just represents the accurate ability of printing of the equipment.
On IT8 colour codes, include following different types of region：
1. shadow color lump area.
2. double exposure color lump area（Check ink trapping effect）.
3. the heavy shade color lump area of black is free of.
4. the heavy shade color lump area containing 20% black.
5. the grey area being made up of CMY or CMYK（Check grey balance）.
6. color lump color area on the spot（To check field density）.
7. CMYK step-wedges（Check dot area coverage）.
（2）The manufacturing process of digital printing equipment ICC characteristic files
By taking digital printing equipment as an example, illustrate the making of ICC characteristic files：
1. calibrate
Before formally printing IT8 colour codes, calibrated, be primarily referred to as on the spot using control strip instrument logarithmic code printing equipment
Density and dot area coverage.It is required that the environment and working condition of digital printer keep stable, for example, the reality in formal production
Ground density, dot area coverage are consistent when must be with printing IT8 colour codes, and the ICC characteristic files only in this way produced could just
Really reflect the chromatic characteristic of this digital printer.
2. IT8 colour codes are printed
IT8 colour codes are pressed into the specific engraved data engraving and printing roller of facing paper roller, specimen page is obtained through printing.
3. ICC characteristic files are generated in ICC characteristic files Software for producing
ICC characteristic file Software for producing is run, selection i1 spectrophotometers are measured, and scanning spectrophotometer is driven,
Colour measurement is carried out to IT8 print samples according to prompting, after measurement terminates, software is by color lump in the chroma data measured and colour code
Cmyk data correspond to exactly, after the ICC characteristic files of Software Create output equipment, by this ICC characteristic file preserve
Get up.
One digital printer might have multiple ICC characteristic files, and reason is paper, ink, printing state, environment
Condition is likely to occur change, all can produce influence to color, it is therefore necessary to make multiple to different paper, ink combination
ICC characteristic files, to meet the needs of production.
Claims (1)
1. a kind of facing paper digital printing Color control and restoring method, it is characterised in that：The Color control and restoring method
Processing step is as follows：
（1）Set up the ICC characteristic files of digital printer
According to specified facing paper printable fabric, IT8 colour code characteristic files of being drawn a design on digital printer, and data are read, build
The characteristic ICC files of vertical digital printer, the colour code is digital standard colour code；
（2）Set up the color environment of standard
The implementation of Color control is required with stable color observation environment first, makes observation original copy color, screen color and print
The effect of brush product color is consistent；
Using standard environment light source, the light source color temperature used by regulation observation sample is 5000K or 6500K, and with higher
Colour rendering index, from ＞ 95% fluorescent tube；
（3）Assort color measuring instrument and control instrument
Using professional color measuring instrument and instrument, it is ensured that the Optimality and stability of measurement quality：
1. spectrophotometer
From i1 spectrophotometers, the colour code in the IT8 normative documents of printing is subjected to color measurements, surveyed using automatic or manual
Amount, after the result of gained is compared with normal data, sets up the Profile ICC files of printing equipment；
2. screen correction instrument
From i1 spectrophotometers, adsorbed on the screen by the sampling head of screen correction instrument, the screen is sampled, if
RGB tri- color ratios example is uneven and when there is colour cast, can be adjusted by software, make up to balance, and set up screen calibration
File；
3. gray scale and colour code
Using the gray scale that uses of facing paper printing of standard, it is differential be set as 100%, 90%, 80%, 70%, 60%,
50%th, 40%, 30%, 20%, 9%, 6%, measured from i1 spectrophotometers, create digital printing double exposure colour code；
（4）Ensure the accurate of final color and stably
Ensure that printing equipment under conditions of normal working condition, the printable fabric of specification and printing-ink, prints IT8 colour codes
File, checks whether pull site is clear, and without dirty trace and drags black phenomenon；
（5）Ensure that display, measurement scan the accurate of color
1. colour temperature is determined, the colour temperature of display is adjusted to 5000K-6000K；
2. gamma value is determined, PC coefficient of combination is adjusted to 2.20, Mac machine coefficients and is adjusted to 1.8；Pass through software and i1 spectrophotometers
To complete；
3. adjustment screen color, the IT8 colour codes in IT8 specimen pages control screen printed with digital printer carry out adjustment, by soft
Part and i1 spectrophotometers are completed, and the colour code in IT8 is passed to screen by software, and i1 spectrophotometers are again by the data of measurement
Computer is returned to, software is compared after correction on this basis, set up the color characteristic file Profile of a standard, led to
Cross Profile to drive display, described Profile color characteristic files are exactly the color space RGB and CIE of display
Transformational relation curve between Lab standard color spaces；
（6）Digital printer ICC characteristic files made by above-mentioned items, screen calibration file, facing paper spot color double exposure is bent
Line, is given a name, is stored, and is fixed, as the operational data of printed matter also primary standard, and is constituted with color control system
One entirety, it is ensured that the color rendition of most standard specimens.
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| CN201710238106.9A CN107009734A (en) | 2017-04-13 | 2017-04-13 | Facing paper digital printing Color control and restoring method |
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| CN108389236A (en) * | 2018-03-05 | 2018-08-10 | 北京印刷学院 | A kind of fluorescent ink jet ink coloured light grey balance control method |
| CN108401087A (en) * | 2018-02-12 | 2018-08-14 | 上海紫恩数码科技有限公司 | Color simulation method before fluoroleum ink |
| CN109383152A (en) * | 2017-08-02 | 2019-02-26 | 广州番禺美特包装有限公司 | A kind of data original copy processing method and the digital sample printing method using the data original copy |
| CN110782381A (en) * | 2019-09-12 | 2020-02-11 | 天津市职业大学 | Narrow-color-gamut printing-scanning-resistant digital watermark manufacturing method |
| CN110851093A (en) * | 2019-11-25 | 2020-02-28 | 天津市银博科技发展有限公司 | Black-free printing method for PDF (Portable document Format) file in printing production |
| CN112233192A (en) * | 2020-09-25 | 2021-01-15 | 北京华夏视科技术股份有限公司 | Electronic signature method and system for printed matter |
| CN112270723A (en) * | 2020-10-26 | 2021-01-26 | 齐齐哈尔大学 | Drawing art digital extraction color restoration method |
| CN114222661A (en) * | 2019-06-21 | 2022-03-22 | 艾司科软件有限公司 | Printed product management system |
| CN115366236A (en) * | 2022-09-05 | 2022-11-22 | 佛山市阿瑞斯数字设备有限公司 | Method for realizing real-time adjustment of digital intelligent color |
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| CN109383152A (en) * | 2017-08-02 | 2019-02-26 | 广州番禺美特包装有限公司 | A kind of data original copy processing method and the digital sample printing method using the data original copy |
| CN108401087B (en) * | 2018-02-12 | 2019-09-10 | 上海紫恩数码科技有限公司 | Color simulation method before fluoroleum inks |
| CN108401087A (en) * | 2018-02-12 | 2018-08-14 | 上海紫恩数码科技有限公司 | Color simulation method before fluoroleum ink |
| CN108389236B (en) * | 2018-03-05 | 2022-04-29 | 北京印刷学院 | Color light and gray balance control method for fluorescent ink-jet ink |
| CN108389236A (en) * | 2018-03-05 | 2018-08-10 | 北京印刷学院 | A kind of fluorescent ink jet ink coloured light grey balance control method |
| CN114222661A (en) * | 2019-06-21 | 2022-03-22 | 艾司科软件有限公司 | Printed product management system |
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| CN114222661B (en) * | 2019-06-21 | 2023-10-27 | 艾司科软件有限公司 | Printed product management system |
| CN110782381A (en) * | 2019-09-12 | 2020-02-11 | 天津市职业大学 | Narrow-color-gamut printing-scanning-resistant digital watermark manufacturing method |
| CN110851093A (en) * | 2019-11-25 | 2020-02-28 | 天津市银博科技发展有限公司 | Black-free printing method for PDF (Portable document Format) file in printing production |
| CN112233192A (en) * | 2020-09-25 | 2021-01-15 | 北京华夏视科技术股份有限公司 | Electronic signature method and system for printed matter |
| CN112270723A (en) * | 2020-10-26 | 2021-01-26 | 齐齐哈尔大学 | Drawing art digital extraction color restoration method |
| CN115366236A (en) * | 2022-09-05 | 2022-11-22 | 佛山市阿瑞斯数字设备有限公司 | Method for realizing real-time adjustment of digital intelligent color |
| CN115366236B (en) * | 2022-09-05 | 2023-09-19 | 佛山市阿瑞斯数字设备有限公司 | Method for realizing digital intelligent color real-time adjustment |
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