CN109270089A - A kind of method of quick obtaining halftone paper printing dot gain - Google Patents
A kind of method of quick obtaining halftone paper printing dot gain Download PDFInfo
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- CN109270089A CN109270089A CN201811283197.9A CN201811283197A CN109270089A CN 109270089 A CN109270089 A CN 109270089A CN 201811283197 A CN201811283197 A CN 201811283197A CN 109270089 A CN109270089 A CN 109270089A
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- 238000007639 printing Methods 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 95
- 238000012216 screening Methods 0.000 claims abstract description 44
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 claims abstract description 14
- 238000012937 correction Methods 0.000 claims abstract description 11
- 238000004886 process control Methods 0.000 claims abstract description 10
- 238000003908 quality control method Methods 0.000 claims abstract description 10
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Classifications
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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
Abstract
The present invention provides the methods of quick obtaining halftone paper printing dot gain.The present invention includes the following steps: that printing net-point expands the foundation of quality control standard information bank；Establishment process control system completes CTP equipment Linearized correction；Design dot gain special test mark version is simultaneously exported；Printing machine correction is completed according to standardization program；It takes standardized test method to carry out printing test, obtains standard testing specimen page；Obtain density, the dot gain value of test specimen page；Establish the dot gain look-up table data library under the conditions of different screenings；Call dot gain test chart with a scale for produce verifying and optimize.The present invention overcomes the defect that enterprise must could obtain printing net-point expansion value by special measurement instrument, realizes that printing process control is simple, efficient, reduce equipment input cost of the enterprise on printing quality control.
Description
Technical field
The present invention relates to the technical field of printing process control, in particular to a kind of quick obtaining halftone paper printing site is expanded
Big method.
Background technique
Printed matter dot gain is to control the key technical index of print quality, when printing different stock, difference
Ink different dot gains can be symbolized under distinct device, how quickly and accurately to obtain printed matter dot gain value
Have become bottleneck problem urgently to be solved during print production.
Currently, the dot gain of printed matter is mainly obtained using dedicated color measuring instrument spectrophotometer both at home and abroad
Value has that use cost is high, high to operating personnel's technical requirements.Therefore, research and development one kind has easily measurement, skill
Art is simple and lower-cost printing net-point expands fast acquiring method, to solution printing quality Digital evaluation, accurate judgement
Print sample quality, the level for improving printing process control have a very important significance and have ten to printing quality is improved
Divide important application value.
Summary of the invention
In response to the problems existing in the prior art, the purpose of the present invention is to provide a kind of expansions of quick obtaining halftone paper printing site
Big method.
The present invention uses the mode that combines of software and hardware, using the dot gain value under the conditions of a variety of screenings of hard ware measure,
By being combined after algorithm optimization with the dot gain test pattern specially designed, so that can only be measured originally by spectrophotometric
The dot gain value of amount is existing quickly and accurately to be obtained by observation, and the efficiency of printing quality control is greatly improved.
To achieve the above object, the invention proposes a kind of method of quick obtaining halftone paper printing dot gain, the party
The technical scheme comprises the following steps used by method:
The foundation of step 1. printing net-point expansion quality control standard information bank
The screening parameter for determining that print is preceding first when making a plate, and according to product quality requirement and halftone paper printing dot gain quality mark
Standard establishes the printing net-point quality control standard information database under the conditions of different screenings.
Step 2. establishment process control system completes CTP equipment Linearized correction
The process control system of CTP plate-making is established, then constructs corresponding CTP printing plate for the screening condition determined in step 1
Linear compensation curve.
Step 3. design dot gain special test mark version is simultaneously exported
3-1. design has 20、40、603 kinds of angles wedge structure dot gain special test figure and difference CMYK net
The dedicated color lump of point percentage, combination form dot gain special test mark version；
3-2. is different according to screening condition, loads its corresponding printing plate compensated curve in general screening software RIP before print respectively
Dot gain special test mark version described in step 3-1 is exported, the 1-bit TIFF text of the CMYK under the conditions of different screenings is obtained
Part；
The 1-bit tiff file that screening obtains imported into general image processing software Adobe Photoshop and carries out by 3-3.
Combination obtains the dot gain combined test mark version comprising different screening conditions；Then net is directly exported using CTP equipment
Point expands combined test mark version, obtains for printing the blueness (C) tested, product (M), Huang (Y), black (K) four printing plates.
Step 4. completes printing machine correction according to standardization program
The water circuit system and ink system of printing machine are safeguarded and corrected, guarantees printing machine dampening system, ink feeding system, pressure
Force system it is working properly.
Step 5. takes standardized test method to carry out printing test, obtains standard testing specimen page
Blueness (C) that 5-1. is obtained using step 3-3, magenta (M), Huang (Y), black (K) four printing plates are surveyed using standardized printing
Method for testing carries out printing test, and it is C(1.40 ± 0.05 that when test, which requires 100% field density control standard), M(1.40 ±
0.05), Y(1.00 ± 0.03), K(1.70 ± 0.05), each ink-covered area density error of control strip reaches close in the range of ± 0.05
Degree continues to print 300 standard samples after requiring, and samples 5 at interval of 50；
5-2. by CMYK field density control standard be adjusted to respectively C(1.35 ± 0.05,1.30 ± 0.05,1.45 ± 0.05,
1.50 ± 0.05), M(1.35 ± 0.05,1.30 ± 0.05,1.45 ± 0.05,1.50 ± 0.05), Y(0.97 ± 0.03,0.94
± 0.03,1.03 ± 0.03,1.06 ± 0.03), K(1.65 ± 0.05,1.60 ± 0.05,1.75 ± 0.05,1.80 ± 0.05)
And step 5-1 process is repeated, obtain each 5 test specimens under 4 kinds of density conditions.
Step 6. obtains density, the dot gain value of test specimen page
Using the measurement of general densitometer to color lump green (C), pinkish red (M), the Huang in 25 test specimen pages in step 5
(Y), black (K) carries out field density, dot gain measurement, and the above measured value is recorded in Microsoft Excel.
Step 7. establishes the dot gain look-up table data library under the conditions of different screenings
The optimal test specimens of dot gain curve data are chosen, the dot gain under the conditions of different screenings, different densities is established
Look-up table data library, and mark out in dedicated dot gain test chart the scale of dot gain value.
Step 8. call dot gain test chart with a scale for produce verifying and optimize.
The step 1 to step 8 is can be close by different screening conditions, difference by primary standardized printing test
Dot gain data under the conditions of degree disposably all obtain, while can also get in its corresponding dot gain test chart
Calibration data, thus set up dot gain database and its dot gain test chart scale characterizing method.The above method is surveyed
At low cost, data accuracy height is tried, can directly observe the dot gain value of printed matter in actual production with dot gain test chart
For the control of printing quality, while the fluctuation of other printing conditions can be also determined with the method, realize a variety of different purposes.
Preferably, the dot gain special test figure of the wedge structure in the step 3-1, the test chart include
20、40、603 kinds of wedge angles, and respectively with 1:3,1:1:, the angle ratio of 3:1 construct the dedicated survey of complete dot gain
Attempt, described 20、40、603 kinds of wedge angles can by well by the dot gain value under various screenings, printing condition very
It reflects well, wherein 20Wedge angle can accurately reflect the slight change of site, and 60Wedge angle then can be accurately anti-
Reflect the large change of site, 40Wedge angle to the reflection of dot gain between 20With 60Centre, described 1:3,1:1:, 3:
1 black and white angle than then can accurately characterize printing net-point expand control in key point: 25%, 50%, 75%, the angle and
Structure design can accurately reflect the dot gain value under various printing conditions.
Preferably, the CMYK dot percentage color lump size in the step 3-1 is 6 × 6mm, it is divided between the color lump
1.5mm, the 6 × 6mm and the design of the color lump at the interval 1.5mm can be not only used for spot measurement equipment, it can also be used to quickly scanning
Measuring device meets the demand of more device measurings.
Preferably, the 1-bit tiff file in the step 3-2, is to pass through setting in general RIP software before print
Different screen angle, screen frequency, dot shape multiple 1-bit tiff files obtained, the 1-bit TIFF are
According to enterprise practical product and quality requirement, by being combined to a variety of screen angles, screen frequency, dot shape, then
It carries out operation by general RIP software before printing getting, thus the parameter that all productions of a combination thereof parameters distribution may use may be used
Realize that primary test can accurately construct the dot gain database of enterprise.
Preferably, the dot gain combined test mark version in the step 3-3 is to utilize Photoshop by a variety of conditions
Under dot gain mark version combination obtained from.It passes through Photoshop software for the small test cell under the conditions of a variety of screenings
1-bit tiff file carry out the split method that obtains the big version dot gain mark version for printing, realize different screening items
The dot gain test mark version of part can print under same printing condition and obtain its test data, and test data is more smart
Really, data more have comparative, while greatly reducing testing cost.
Preferably, the dot gain test chart in the step 7 is equipped with 20 concentric circles and graduation mark, two neighboring institute
State concentric diameter of a circle difference 1mm.The structure purpose of design of 20 concentric circles and graduation mark is for the state with halftone paper printing
Standard dot gain value defined in the standard ISO12647-2 of border establishes corresponding relationship, and the concentric circles diameter difference of 1mm then considers
The visual characteristic of human eye and the characterization precision for dot gain value are arrived.
The present invention has the beneficial effect that:
The present invention is on the basis of calibrating CTP and printing machine, and the printing net-point of design specialized expands test chart, is printed by standardization
Brush test, chooses qualified test specimen page, then measures density and dot gain value that specimen page specifies color lump, records simultaneously
Scale value in dedicated site test chart, establishes the mapping table of density and dot gain, to realize through observation
Quickly determine printed matter dot gain value.The method, which overcomes enterprise, could obtain printing net-point by special measurement instrument
The defect of expansion value realizes the simple, efficient of printing process control, reduces equipment of the enterprise on printing quality control and throws
Enter cost.
Detailed description of the invention
Fig. 1 is the flow chart of the embodiment of the present invention.
Fig. 2 is the dot gain test chart that the embodiment of the present invention has scale value.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, below by accompanying drawings and embodiments, to this
Invention is further elaborated.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention,
The range being not intended to restrict the invention.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to keep away
Exempt from unnecessarily to obscure idea of the invention.
The present invention will be further described with reference to the accompanying drawings of the specification:
As depicted in figs. 1 and 2, a kind of method of quick obtaining halftone paper printing dot gain, comprising the following steps:
The foundation of step 1. printing net-point expansion quality control standard information bank
1-1. determines that screening when printing preceding CTP plate-making is joined according to printing enterprise's printing paper characteristic, ink characteristics, printing machine situation
CTP operation template is counted and constructs, screening parameter includes site type, screen frequency, angle of halftone screen line；
The paper should include the most typical art paper of enterprise: 105g/m2、157g/m2、200g/m2；
The site type include square grid, circular net, circumference net, the screen frequency include 150LPI, 175LPI,
200LPI；
1-2. printing enterprise halftone paper printing dot gain quality mark according to defined in product quality requirement and ISO12647-2
Standard establishes the printing net-point quality control standard information database under the conditions of different screenings, includes product type in database, adds
Network parameters, dot gain standard；
The ISO12647-2 is printing international standard, and strict difinition copperplate printing is under the conditions of different screenings in standard
Standard dot gain value.
Step 2. establishment process control system completes CTP equipment Linearized correction
2-1. configures CTP developer solution according to CTP types of plates, according to standardization program, and measurement developer solution pH value, conductivity, temperature reach
To CTP plate-making condition and requirement；
2-2. exports CTP printing plate under conditions of being not loaded with printing plate compensated curve and printing compensated curve in digitized mine before print
Control strip is linearized, the dot data of the 0%-100% on CTP printing plate linearisation control strip is then measured, to establish CTP printing plate
Linear compensation curve；
The site of the 0%-100% refer to from 0% to 100% with 5% for interval 21 grades of sites；
The curve should be loaded after the completion of the CTP linear compensation curve building exports CTP linearisation control strip, measurement again
21 grades of dot datas, it is desirable that every grade of site error is strict controlled in the range of ± 0.5%, while requiring CTP linear compensation bent
Line is smooth；
CTP linear compensation curve is applied in the preceding general screening software RIP of print by 2-3., completes the work of CTP Linearized correction,
Output error control in site is in ± 0.5% range after correction；
2-4. repeats the CTP linearisation school under the conditions of every kind of screening defined in the step of above-mentioned 2-2 and 2-3 completion step 1-2
Positive work.
Step 3. design dot gain special test mark version is simultaneously exported
3-1. design has the dot gain special test figure and difference CMYK dot percentage of the wedge structure of different angle
Dedicated color lump, combination form dot gain special test mark version；
The CMYK dot percentage color lump size is 6 × 6mm, the color lump at the color lump interval interval 1.5mm, 6 × 6mm and 1.5mm
Design can be not only used for spot measurement equipment, it can also be used to which quick scanning survey equipment meets the demand of more device measurings；
The wedge structure of the different angle is as shown in Fig. 2, include 20、40、603 kinds of angles, 20、40、603 kinds of wedge shapes
Dot gain value under various screenings, printing condition will can be well reflected out by angle well, wherein 20Key groove
Degree can accurately reflect the slight change of site, and 60Wedge angle then can accurately reflect the large change of site, 40Key groove
The reflection to dot gain is spent between 20With 60Centre, black and white angle under 3 kinds of angles is than being respectively 1:3,1:1,3:1, respectively
25%, 50%, 75% site is corresponded to, single wedge size is 20*20mm, and the angle and structure design can accurately reflect each
Dot gain value under kind printing condition；
The CMYK dot percentage includes from 5%, 10%, 15% ... 100% 20 grades of sites；
According to screening condition difference, the general screening software RIP before print loads its corresponding printing plate compensated curve output to 3-2. respectively
Dot gain special test mark version described in step 3-1 obtains the 1-bit tiff file of the CMYK under the conditions of different screenings；
The 1-bit tiff file be before print in general RIP software by be arranged different screen angle, screen frequency,
Dot shape multiple 1-bit tiff files obtained, the parameter that all productions of a combination thereof parameters distribution may use, by
This can realize that primary test can accurately construct the dot gain database of enterprise；
The 1-bit tiff file that screening obtains imported into general image processing software Adobe Photoshop and carries out by 3-3.
Combination obtains the dot gain combined test mark version comprising different screening conditions,
The dot gain combined test mark version is to contain a constitutional diagram of a variety of screening conditions, in order to primary
Printing standard test can get the dot gain data value under the conditions of a variety of screenings；
The 1-bit tiff file of the small test cell under the conditions of a variety of screenings split is carried out by Photoshop software to obtain
The method of big version dot gain mark version for printing, the dot gain test mark version for realizing different screening conditions can be same
Its test data is printed and obtained under printing condition, and test data is more accurate, and data more have comparative, substantially reduces simultaneously
Testing cost；
3-4. directly exports dot gain combined test mark version described in step 3-3 using CTP equipment, obtains for printing test
Blueness (C), product (M), Huang (Y), black (K) four printing plates.
Step 4. completes printing machine correction according to standardization program
4-1. cleans the water circuit system of printing machine, and adds fountain solution according to standard recipe, it is desirable that pH value, the electricity of fountain solution
Conductance, temperature control are in the critical field of fountain solution used；
4-2. is cleaned and is corrected according to ink system of the plant maintenance specification to printing machine, it is desirable that the ink road system of printing machine
Pressure of uniting is uniformly and pressure value is in critical field.
Step 5. takes standardized test method to carry out printing test, obtains standard testing specimen page
Blueness (C) that 5-1. is obtained using step 3-4, magenta (M), Huang (Y), black (K) four printing plates are surveyed using standardized printing
Method for testing is tested, and it is C(1.40 ± 0.05 that when test, which requires 100% field density control standard), M(1.40 ± 0.05), Y
(1.00 ± 0.03), K(1.70 ± 0.05), each ink-covered area density error of control strip reaches density requirements in the range of ± 0.05
After continue print 300 standard samples, and at interval of 50 sample 5；Print speed printing speed when printing standardization is tested must not be lower than
The 80% of normal print speed printing speed, density value are to remove the white density value of paper；
5-2. by CMYK field density control standard be adjusted to respectively C(1.35 ± 0.05,1.30 ± 0.05,1.45 ± 0.05,
1.50 ± 0.05), M(1.35 ± 0.05,1.30 ± 0.05,1.45 ± 0.05,1.50 ± 0.05), Y(0.97 ± 0.03,0.94
± 0.03,1.03 ± 0.03,1.06 ± 0.03), K(1.65 ± 0.05,1.60 ± 0.05,1.75 ± 0.05,1.80 ± 0.05)
And step 5-1 process is repeated, obtain each 5 test specimens under 4 kinds of density conditions.
Step 6. obtains density, the dot gain value of test specimen page
General densitometer spectrophotometer is printed in 6-1. correction, and setting running parameter is D50 light source, 20Visual field；
6-2. is using white bottom liner to color lump blueness (C), magenta (M), Huang (Y), black (K) in 25 test specimen pages in step 5
Field density, dot gain measurement are carried out, and the above measured value is recorded in Microsoft Excel, dot gain value is in measurement
Field density maximum value need to be selected as calculating reference value.
Step 7. establishes the dot gain look-up table data library under the conditions of different screenings
7-1. chooses dot gain curve specimen page the most smooth, records different screening conditions, different densities according to measurement result
Under the conditions of dot gain scale value；
7-2. establishes the dot gain look-up table data library under the conditions of different screenings, different densities；
7-3. marks corresponding dot gain value, site according to dot gain look-up table data library in dedicated dot gain test chart
Expand test chart and be equipped with 20 concentric circles and graduation mark, the two neighboring concentric diameter of a circle differs 1mm, 20 concentric circles and
The structure purpose of design of graduation mark is for the expansion of standard site defined in the international standard ISO12647-2 with halftone paper printing
Big value establishes corresponding relationship, and the concentric circles diameter difference of 1mm then considers the visual characteristic of human eye and for dot gain value
Characterization precision.
Step 8. call dot gain test chart with a scale for produce verifying and optimize
8-1. selects the dot gain test chart being consistent with screening condition to be exported on normal printing block as control strip；
8-2. directly read the dot gain value in dot gain test chart and with the dot gain value of spectrophotometer measurement into
Row compares, and is optimized according to result to the scale in dot gain test chart and updates dot gain look-up table data library.
The present invention is to compensate for have to the problem of could obtaining dot gain by special instrument in the past, by specially setting
The dot gain value that the dot gain test chart of meter will be unable to observation can intuitively characterize in dot gain test chart, be easy to straight
Connect observation.It, which passes through the test mark version specially designed and test method, can disposably get a variety of screening conditions and printing condition
Under dot gain value, it is established that dot gain database and dot gain test chart under different screening conditions and printing condition
It is convenient to be called as needed in printing process.
The present invention is by one-step print, and repeatedly measurement can establish the corresponding relationship of density and dot gain, implementation method
Simply, testing cost is low, computational accuracy is high, can be widely used under the various printing conditions such as different stocks, different ink
Dot gain obtains, and has higher dissemination and value.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of method of quick obtaining halftone paper printing dot gain, it is characterised in that the following steps are included:
The foundation of step 1. printing net-point expansion quality control standard information bank
The screening parameter for determining that print is preceding first when making a plate, and according to product quality requirement and halftone paper printing dot gain quality mark
Standard establishes the printing net-point quality control standard information database under the conditions of different screenings；
Step 2. establishment process control system completes CTP equipment Linearized correction
The process control system of CTP plate-making is established, then constructs corresponding CTP printing plate for the screening condition determined in step 1
Linear compensation curve；
Step 3. design dot gain special test mark version is simultaneously exported
3-1. design has 20、40、603 kinds of angles wedge structure dot gain special test figure and difference CMYK net
The dedicated color lump of point percentage, combination form dot gain special test mark version；
3-2. loads its corresponding printing plate compensated curve according to screening condition difference before print respectively in general screening software RIP defeated
Dot gain special test mark version described in step 3-1 out, obtains the 1-bit tiff file of the CMYK under the conditions of different screenings；
The 1-bit tiff file that screening obtains imported into general image processing software Adobe Photoshop and carries out by 3-3.
Combination obtains the dot gain combined test mark version comprising different screening conditions；Then net is directly exported using CTP equipment
Point expands combined test mark version, obtains for printing the blueness (C) tested, product (M), Huang (Y), black (K) four printing plates；
Step 4. completes printing machine correction according to standardization program
The water circuit system and ink system of printing machine are safeguarded and corrected, guarantees printing machine dampening system, ink feeding system, pressure
Force system it is working properly；
Step 5. takes standardized test method to carry out printing test, obtains standard testing specimen page
Blueness (C) that 5-1. is obtained using step 3-3, magenta (M), Huang (Y), black (K) four printing plates are surveyed using standardized printing
Method for testing is tested, and it is C(1.40 ± 0.05 that when test, which requires 100% field density control standard), M(1.40 ± 0.05), Y
(1.00 ± 0.03), K(1.70 ± 0.05), each ink-covered area density error of control strip reaches density requirements in the range of ± 0.05
After continue print 300 standard samples, and at interval of 50 sample 5；
5-2. by CMYK field density control standard be adjusted to respectively C(1.35 ± 0.05,1.30 ± 0.05,1.45 ± 0.05,
1.50 ± 0.05), M(1.35 ± 0.05,1.30 ± 0.05,1.45 ± 0.05,1.50 ± 0.05), Y(0.97 ± 0.03,0.94
± 0.03,1.03 ± 0.03,1.06 ± 0.03), K(1.65 ± 0.05,1.60 ± 0.05,1.75 ± 0.05,1.80 ± 0.05)
And step 5-1 process is repeated, obtain each 5 test specimens under 4 kinds of density conditions；
Step 6. obtains density, the dot gain value of test specimen page
Using general densitometer to color lump green (C), pinkish red (M), yellow (Y), black in 25 in step 5 test specimen pages
(K) field density, dot gain measurement are carried out, and the above measured value is recorded in Microsoft Excel；
Step 7. establishes the dot gain look-up table data library under the conditions of different screenings
The optimal test specimens of dot gain curve data are chosen, the dot gain under the conditions of different screenings, different densities is established
Look-up table data library, and in dedicated dot gain test chart mark dot gain value scale；
Step 8. call dot gain test chart with a scale for produce verifying and optimize.
2. a kind of method of quick obtaining halftone paper printing dot gain as described in claim 1, it is characterised in that: the step
The dot gain special test figure of wedge structure in rapid 3-1, which includes 20、40、603 kinds of wedge angles, and point
Not with 1:3,1:1:, the angle ratio of 3:1 construct complete dot gain special test figure.
3. a kind of method of quick obtaining halftone paper printing dot gain as described in claim 1, it is characterised in that: the step
CMYK dot percentage color lump size in rapid 3-1 is 6 × 6mm, is divided into 1.5mm between the color lump.
4. a kind of method of quick obtaining halftone paper printing dot gain as described in claim 1, it is characterised in that: the step
1-bit tiff file in rapid 3-2, be before print in general RIP software by be arranged different screen angles, screen frequency,
Dot shape multiple 1-bit tiff files obtained.
5. a kind of method of quick obtaining halftone paper printing dot gain as described in claim 1, it is characterised in that: the step
Dot gain combined test mark version in rapid 3-3 be using Photoshop will be a variety of under the conditions of the combination of dot gain mark version and
It obtains.
6. a kind of method of quick obtaining halftone paper printing dot gain as described in claim 1, it is characterised in that: the step
Dot gain test chart in rapid 7 is equipped with 20 concentric circles and graduation mark, and the two neighboring concentric diameter of a circle differs 1mm.
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| CN201811283197.9A CN109270089B (en) | 2018-10-31 | 2018-10-31 | Method for rapidly acquiring printing dot enlargement of coated paper |
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| CN201811283197.9A CN109270089B (en) | 2018-10-31 | 2018-10-31 | Method for rapidly acquiring printing dot enlargement of coated paper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113858842A (en) * | 2021-09-18 | 2021-12-31 | 浙江武义明招印业有限公司 | High-quality printing method of flexographic printing machine capable of controlling printing quality |
| CN115122757A (en) * | 2022-07-25 | 2022-09-30 | 印工社(青岛)互联网科技有限公司 | Digital printing quality evaluation method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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