CN106891627A - A kind of method for determining newspaper printing fountain solution preset value - Google Patents
A kind of method for determining newspaper printing fountain solution preset value Download PDFInfo
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- CN106891627A CN106891627A CN201710053725.0A CN201710053725A CN106891627A CN 106891627 A CN106891627 A CN 106891627A CN 201710053725 A CN201710053725 A CN 201710053725A CN 106891627 A CN106891627 A CN 106891627A
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- ink
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/06—Lithographic printing
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Abstract
The invention discloses a kind of method for determining newspaper printing fountain solution preset value.The method of the present invention designs two sets of special printing test charts, by print respectively test the space of a whole page close to blank and space of a whole page picture and text coverage rate be 40% when optimum dampener liquid consumption, the relation set up between optimum dampener liquid consumption and space of a whole page picture and text area coverage, software is recycled to read the digital document of printing living-article, calculate the picture and text area coverage of each ink-covered area, according to having set up relation function, quantitatively determine fountain solution preset value, fountain solution consumption is preset by rule of thumb by workman compared to current newspaper printing, improve the preset degree of accuracy, the set-off for bringing or ink emulsification overscale problems are forbidden in solution because fountain solution is preset.
Description
Technical field
The invention belongs to printing technology, it is related to a kind of preset method for determination of amount of newspaper printing fountain solution, specifically
It is a kind of according to printing machine characteristic and the image coverage feature of digital prepress file, when determining journalism rotary press printing newspaper
The method of fountain solution preset value.
Background technology
Lithographic printing, to the selection adsorpting characteristic of fountain solution, is first coated with wetting using printing plate at the non-graphic position of printing plate
Liquid, and picture and text position cannot adhere to fountain solution, when being coated ink, ink is only coated on the picture and text position of printing plate.If printing
When fountain solution it is insufficient, it is impossible to effective over the non-graphic position of printing plate, it may appear that non-graphic position adheres to curing ink, cause
Blank position on stock is set dirty trace occur；But if fountain solution excess during printing, occurs that ink is excessively emulsified again, print
Brush product mass colour is not bright-coloured, or even washmarking occurs, float the printing trouble such as dirty.For newspaper printing, because fountain solution supply is inclined
It is many, making the picture saturation degree of printing reduces, and ink setting is slack-off etc., it is the FAQs for influenceing newspaper printing quality.
Offset press is before normal printing, it is necessary to according to the spy of workshop condition, the performance characteristic of printing machine, paper and ink
Property, picture and text area distributions on the space of a whole page etc., output ink quantity and wetting liquid measure regulation is appropriate.Optimal fountain solution supply be
Picture and text position ink amount normal in size, and on the premise of blank position is not in dirty trace, it is reduced as far as the confession of fountain solution
Ying Liang, that is, printed matter blank position is close but is not reaching to boundary.At present, many offset presses have been equipped with digitlization
Output ink quantity reset function, replace original with the preset output ink quantity of workman's experience, but existing offset press is without numeral
The preparatory function of the output wetting liquid measure of change is, it is necessary to the fountain solution preset value that sets by rule of thumb of workman.In printing process, wetting
The main Consumption of liquid has：Evaporate, be coated on printing plate non-graphic position be then transferred to stock surface, be emulsified in ink in again with
Printing ink transfer to stock.For sheet-fed offset press, by printing paper grades, size that different living-articles are used not
Together, the absorbability to fountain solution is different, and preset wetting liquid measure has larger difficulty；Printed for journalism rotary press and reported
Paper, due to workshop moisture temperature environment, printing machine performance, paper and ink characteristic etc. all in stabilization state, the width of paper
Face is also fixed, and when printing different living-articles, the principal element for influenceing fountain solution reasonable demand amount is space of a whole page picture and text coverage rate
Difference, but picture and text area coverage is difficult to make by rule of thumb accurately assessment, therefore sometimes because fountain solution supply
Deficiency, blank position scumming, and more commonly fountain solution consumption exceeds optimal demand, and influence newspaper printing quality.
The content of the invention
The present invention needs the method that workman presets fountain solution output quantity by rule of thumb to compare for current newspaper printing, can pass through
Read the digital document of current living-article, through calculating, accurately determine the method for optimal fountain solution preset value, thus solve by
Forbidden the set-off for bringing or ink emulsification overscale problems in fountain solution is preset, it is proposed that one kind determines that newspaper printing fountain solution is preset
The method of amount.
In order to solve the above technical problems, the present invention includes two sets of special design and printing test charts, a kind of journalism rotary printings
The computational methods of machine fountain solution preset value and a set of reading digital document calculate the software of fountain solution preset value again.By printing
Test chart is stated, the relation that data are set up between optimal fountain solution supply and space of a whole page picture and text area coverage is obtained, in newspaper
In print production, software reads the digital document of printing living-article, calculates the picture and text area coverage of each ink-covered area, according to having set up
Relation function, quantitatively determines the preset value of fountain solution；Two sets of special design and printing test charts include a test chart and No. two
Test chart；
A test chart in two sets of described printing test charts, be only containing an ink-covered area width with printing machine
Unit, each ink-covered area includes the control strip of blue or green, pinkish red, yellow, black four color color lump on the spot, and the length of control strip is ink-covered area width
Integral multiple, containing most ink-covered area numbers under requirement of the length less than more than 2 centimetres of paper width, control strip is along space of a whole page width side
To being placed centrally in the seaming position of the space of a whole page.No. two test charts in two sets of described printing test charts, except including and one
Number test chart identical control strip is simultaneously arranged at outside identical position, also include that width is control strip width 50%, height
It is 40% black, blue or green, pinkish red, the Huang Sise color lump on the spot of plate cylinder girth, it is yellow on the basis of the center line of space of a whole page width
Color lump above left side, pinkish red color lump below left side, black block above right side, cyan block in lower right-hand side, yellow block and
1 centimetre of blank of spacing is kept between pinkish red color lump, 1 centimetre of blank of spacing, magenta are kept between black block and cyan block
Block and cyan block keep 1 millimeter of blank of spacing between control strip respectively.
The computational methods of described journalism rotary press fountain solution preset value specifically include following steps：
Step (1) makes a test printing plate and No. two test printing plates respectively using a test chart and No. two test charts.
A test printing plate described in step (2) installation steps (1) is on journalism rotary press, and regulation four-color machine group is defeated
Amount out of ink and wetting liquid measure, make four color ink Color uniformities and chromatic value meet newspaper printing requirement, and on the spot edge close to but
There is not set-off, the fountain solution output quantity F of the current each unit of record1.Four described color ink Color uniformities and chromatic value meet
Newspaper printing requirement can be customized requirement, or requirement that such as ISO 12647-3 standards specify.
No. two test printing plates described in step (3) installation steps (1), regulation four-color machine group output ink quantity and wetting liquid measure,
Four color ink Color uniformities and chromatic value requirement is set to meet the newspaper printing requirement described in step (2), and control strip edge is close
But there is not set-off, the fountain solution output quantity F of the current each unit of record2。
Step (4) reads in the digital document of living-article to be printed, and printing machine is directed at the space of a whole page width center line of digital document
Axial centerline, in units of an ink-covered area width of printing machine, carry out subregion to digital document, calculate the picture and text of each subregion
Area coverage, then the maximum ink-covered area of picture and text area coverage is found out, the picture and text area coverage of note picture and text area coverage maximum ink-covered area is
TSmax。
Step (5) is multiplied by the girth of plate cylinder with the width of an ink-covered area, obtains an area for ink-covered area, is designated as S.
Step (6) is with the picture and text area coverage TS of the picture and text area coverage maximum ink-covered area described in step (4)maxDivided by step
(5) the area S of an ink-covered area described in, obtains the picture and text coverage rate of picture and text area coverage maximum ink-covered area, is designated as t, determines step
(4) the fountain solution preset value F of the living-article to be printed described in is：
Beneficial effects of the present invention：Method of the present invention can according to printing living-article space of a whole page picture and text area coverage,
By calculating, optimal fountain solution preset value is accurately determined, it is to avoid cause blank position scumming because fountain solution supply is very few, make
Into waste of material；Or ink emulsification excessively, causes dried slow, color saturation reduction caused by fountain solution excess
Deng influence printing product quality.
Brief description of the drawings
Fig. 1 is the printing test chart one of present invention design；
Fig. 2 is the printing test chart two of present invention design.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
In lithography process, enough fountain solutions are on the one hand needed, prevent blank position scumming；On the other hand,
The presence of fountain solution will necessarily be emulsified with ink, so as to influence the saturation degree of ink, fountain solution supply is more, emulsifies tighter
Weight.On the premise of blank position not scumming, the supply of fountain solution is reduced as far as possible, until approaching but being not reaching to set-off side
Boundary, is only optimal fountain solution supply.The main Consumption of fountain solution in printing process has：Evaporation, printing plate blank parts
Fountain solution be transferred to paper and absorbed, three kinds of modes such as the fountain solution that is emulsified in ink is transferred on paper.Due to report
Generally there is strict control in paper machine room to humiture, and the moisture content that evaporation is consumed is stablized relatively；Different from sheet-fed printing,
During journalism rotary press printing newspaper, the type and size of paper are usually fixed, the ink that is used and to ink film thickness
Requirement be also fixed, the principal element for influenceing fountain solution supply is that the picture and text area coverage of the space of a whole page is different, but version
The picture and text area coverage in face is difficult to visually evaluate, therefore, the present invention proposes that one kind first passes through experiment test and sets up picture and text
Area coverage and the relation of optimum dampener liquid consumption, determine rational further according to the specific picture and text area coverage for printing living-article
The method of fountain solution consumption.Avoid causing blank position scumming because fountain solution supply is very few, cause waste of material；Or because of wetting
Liquid excess causes ink emulsification excessively, causes dried slow, color saturation reduction, influences printing product quality.
A kind of method for determining newspaper printing fountain solution consumption proposed by the present invention, the printing comprising two sets of special designs is surveyed
Attempt, a kind of computational methods of journalism rotary press fountain solution preset value and a set of digital document that can read calculate fountain solution again
The software of preset value；By printing the test chart, acquisition data are set up optimum dampener liquid supply and are covered with space of a whole page picture and text area
Relation between lid rate, in the production of follow-up newspaper printing, the software reads the digital document of printing living-article, calculates each ink
The picture and text area coverage in area, according to relation function has been set up, quantitatively determines fountain solution preset value.
Designed two sets of printings test chart of the invention, a test chart is as shown in figure 1, for detecting in the space of a whole page close to blank
When required optimum dampener liquid supply；No. two test charts are as shown in Fig. 2 when being 40% for detecting space of a whole page picture and text coverage rate
The supply of required optimum dampener liquid.Number test chart only containing in units of an ink-covered area width by printing machine,
Each ink-covered area includes blue or green, pinkish red, yellow, black four color control strip on the spot, and the width of control strip is the integral multiple of ink-covered area width,
Length is met less than most ink-covered area numbers is contained under the requirement of more than 2 centimetres of paper width, and control strip is put between two parties in the width direction
It is placed in the seaming position of the space of a whole page.Width such as each ink-covered area of certain brand printing machine is 4 centimetres, and cylinder circumference is 54 centimetres, institute
Printing newspaper width is 85 centimetres, then design the width of control strip for 20 times of ink-covered area width, i.e., 80 centimetres are wide, and each ink-covered area contains
Blue or green, pinkish red, yellow, black four color color lump on the spot, the width of each color lump on the spot is 1 centimetre, is highly 0.8 centimetre, for evaluating and testing ink
The size and uniformity of amount.
No. two test charts are except containing an above-mentioned test chart identical control strip and in addition to being arranged at identical position, also wrapping
Black, blue or green, pinkish red, Huang Sise containing large area color lumps on the spot, the width of each color lump is equal to the width half of control strip, each
The height of color lump for plate cylinder girth 40%, on the basis of the center line of width, yellow block above left side, magenta
Below left side, above right side, cyan block is kept for 1 centimetre to black block to block between lower right-hand side, yellow block and pinkish red color lump
The blank of spacing, between black block and cyan block keep 1 centimetre of blank of spacing, pinkish red color lump, cyan block respectively with control strip
Between keep 1 millimeter of blank of spacing.Example as described above, black, blue or green, pinkish red, Huang Sise color lumps on the spot, every piece of width is
40 centimetres, be highly 21.6 centimetres, is respectively arranged at position as shown in Figure 2.
The computational methods of journalism rotary press fountain solution preset value, specifically include following steps：
Step (1) makes a test printing plate and No. two tests respectively using a described test chart and No. two test charts
Printing plate.
Step (2) installs a beta version to journalism rotary press, adjusts four-color machine group output ink quantity and fountain solution
Amount, makes four color ink Color uniformities and chromatic value meet newspaper printing requirement, is made on paper by gradually decreasing fountain solution output quantity
Margin part, especially the edge of control strip just start dirty trace occur, record starts the fountain solution that occurs before dirty trace
Output quantity arranges value F1, the F for being recorded1Represent the condition for keeping normal printing ink film thickness close to blank but ink roller in the space of a whole page
Under, to resist the optimum dampener liquid consumption required for space of a whole page scumming.It is expressed as：
F in formula (1)1Fountain solution supply during a number beta version of printing is represented, E represents a print cycle and evaporated
Wetting liquid measure, fwRepresent the wetting liquid measure that the blank position of unit area coverage rate is shifted, foRepresent unit area coverage rate
The wetting liquid measure that is shifted of picture and text position, t1It is a picture and text area coverage for beta version.Because control strip is on the space of a whole page
Shared area very little, i.e. t1Very little, the fountain solution supplied mainly is consumed in evaporation and is coated on space of a whole page blank position and turns again
Move on on paper, absorbed by paper, so having：
F1≈E+fw (2)
It refers to the green grass or young crops of each ink-covered area, product on control strip that four described color ink Color uniformities and chromatic value meet newspaper printing requirement
The chromaticity distortion of red, yellow, black four color is in the error range that newspaper printing is allowed, it is possible to use such as xrite-528 spectrophotometrics
Meter fixed point detection control strip on each color lump chromatic value or detected using such as IntelliTrax automatic scanning systems.
Step (3) is installed on journalism rotary press.Because the topmost consumption wayses of printing process fountain solution are breasts
Change is then transferred on paper in ink, therefore the fountain solution of the bigger ink-covered area consumption of picture and text area coverage is also more, it is necessary to carry
The wetting liquid measure of confession is also bigger.The inking device of offset press can be different according to different ink-covered area picture and text area coverage controlled outputs
Ink amount, and damping device does not realize the function of zonal control according to ink-covered area, when each ink-covered area picture and text area coverage difference, most
Excellent fountain solution supply is exactly the fountain solution supply when picture and text area coverage maximum ink-covered area is close but set-off does not occur.Print
During No. two beta versions of brush, by adjusting four-color machine group output ink quantity, four color ink Color uniformities and chromatic value is set to meet newspaper printing
It is required that, by gradually decreasing the margin part that fountain solution output quantity makes on paper, the especially side of large area color lump on the spot
Edge just starts dirty trace occur, and record starts the fountain solution output quantity F before dirty trace occur2, the F for being recorded2Represent with No. two tests
Under conditions of the image coverage of version, the normal printing ink film thickness of holding, used to resist the optimum dampener liquid required for space of a whole page scumming
Amount.It is expressed as：
F2=E+fw·(1-t2)+fo·t2 (3)
F in formula (3)2Fountain solution supply, t when representing No. two beta versions of printing2Represent and contain large area on No. two beta versions
The picture and text area coverage of the ink-covered area of color lump, such as Fig. 2 cyans version, the picture and text area of each ink-covered area of the center line right side marked as 11 to 20
Coverage rate.According to formula (1) and formula (2), can be obtained by conversion：
Due to t2And t1Difference be equal to large area on the spot in ink-covered area where color lump, this on the spot color lump with respect to plate cylinder
Picture and text area coverage, the height of the color lump on the spot is designed to the 40% of cylinder circumference, so t2And t1Difference be 40%,
Have：
Step (4) is directed at the axial centerline of printing machine with the width center line of the digital document of the living-article to be printed for reading in,
In units of one width of ink-covered area of printing machine, subregion is carried out to digital document, calculate the picture and text area coverage of each subregion, then
The maximum ink-covered area of picture and text area coverage is found out, the picture and text area coverage of note picture and text area coverage maximum ink-covered area is TSmax。
Step (5) is multiplied by the girth of plate cylinder with the width of an ink-covered area, obtains an area for ink-covered area, is designated as S.
Step (6) is with the picture and text area coverage of the picture and text area coverage maximum ink-covered area described in step (3) divided by step (4) institute
The area for ink-covered area stated, obtains the picture and text coverage rate of picture and text area coverage maximum ink-covered area, is designated as t, has：
Because each ink-covered area picture and text coverage rate of living-article to be printed is different, optimum dampener liquid supply should be according to picture and text area coverage
Maximum ink-covered area determines, has：
Optimum dampener liquid consumption when wherein F represents that the picture and text coverage rate of picture and text area coverage maximum ink-covered area is t.Convolution
(2) and formula (5), the preset value for determining the fountain solution output quantity of living-article to be printed is：
Claims (2)
1. it is a kind of determine newspaper printing fountain solution preset value method, it is characterised in that：By printing two sets of special design and printings
Test chart, obtains the relation that data are set up between optimum dampener liquid supply and space of a whole page picture and text area coverage, in newspaper printing
In production, the digital document of printing living-article is read, the picture and text area coverage of each ink-covered area is calculated, according to opening relationships letter
Number, quantitatively determines fountain solution preset value；
Wherein two sets special design and printing test charts include a test chart and No. two test charts；
Wherein No. one test chart, only containing in units of an ink-covered area width by printing machine, each ink-covered area includes blue or green, product
The control strip of red, yellow, black four color color lump on the spot, the length of control strip is the integral multiple of ink-covered area width, wide less than paper in length
Contain most ink-covered area numbers under the requirement that more than 2 centimetres of degree, control strip is placed centrally the seaming in the space of a whole page along space of a whole page width
Position；No. two described test charts, except include with first set identical control strip and in addition to being arranged at identical position, also wrap
It is the 50% of control strip width containing width, is highly 40% black, blue or green, pinkish red, the Huang Sise color on the spot of plate cylinder girth
Block, on the basis of the center line of space of a whole page width, above left side, below left side, black block is on the right side for pinkish red color lump for yellow block
Side top, cyan block keeps 1 centimetre of blank of spacing, black block and cyan between lower right-hand side, yellow block and pinkish red color lump
1 centimetre of blank of spacing is kept between block, pinkish red color lump and cyan block keep 1 millimeter of sky of spacing between control strip respectively
In vain.
2. it is according to claim 1 it is a kind of determine newspaper printing fountain solution preset value method, it is characterised in that：Described
The computational methods of journalism rotary press fountain solution preset value, specifically include following steps：
A test chart and No. two test charts described in step (1) make a test printing plate and No. two test printing plates respectively；
A test printing plate described in step (2) installation steps (1) on journalism rotary offset machine, regulation four-color machine group output ink
Amount and wetting liquid measure, make four color ink Color uniformities and chromatic value meet newspaper printing requirement, and edge is close on the spot but does not have
There is set-off, the fountain solution output quantity F of the current each unit of record1；
No. two test printing plates described in step (3) installation steps (1), regulation four-color machine group output ink quantity and wetting liquid measure, make four
Color ink Color uniformity and chromatic value requirement meet the newspaper printing requirement described in step (2), and control strip edge is close but does not have
Occur set-off, the fountain solution output quantity F of the current each unit of record2；
Step (4) reads in the digital document of living-article to be printed, and the axle of printing machine is directed at the space of a whole page width center line of digital document
To the midline, in units of an ink-covered area width of printing machine, subregion is carried out to digital document, calculates the picture and text covering of each subregion
Area, then the maximum ink-covered area of picture and text area coverage is found out, the picture and text area coverage of note picture and text area coverage maximum ink-covered area is TSmax；
Step (5) is multiplied by the girth of plate cylinder with the width of an ink-covered area, obtains an area for ink-covered area, is designated as S；
Step (6) is with the picture and text area coverage TS of the picture and text area coverage maximum ink-covered area described in step (4)maxDivided by step (5) institute
The area S of the ink-covered area stated, obtains the picture and text coverage rate of picture and text area coverage maximum ink-covered area, is designated as t, determines step (4) institute
The fountain solution preset value F of the living-article to be printed stated is：
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219470A (en) * | 1997-10-22 | 1999-06-16 | 日本宝德温株式会社 | Dampening water feeding method and apparatus |
| EP1216833B1 (en) * | 2000-11-24 | 2006-06-28 | Goss International Montataire S.A. | Method for regulating the ink-fountain solution balance in a rotary offset printing machine |
| CN201530163U (en) * | 2009-07-23 | 2010-07-21 | 深圳华新彩印制版有限公司 | Printing machine and damping system, damping liquid adding apparatus, and damping additive suction means |
| CN103465657A (en) * | 2013-09-02 | 2013-12-25 | 中国印刷科学技术研究所 | Prediction method of printing color features of different printing materials |
| CN103714245A (en) * | 2013-12-19 | 2014-04-09 | 杭州电子科技大学 | Method for obtaining optimal solid density for coated paper printing |
| CN104742516A (en) * | 2015-03-12 | 2015-07-01 | 周广伟 | High-power image dot coverage rate digital measuring method suitable for whole printing process |
-
2017
- 2017-01-22 CN CN201710053725.0A patent/CN106891627B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219470A (en) * | 1997-10-22 | 1999-06-16 | 日本宝德温株式会社 | Dampening water feeding method and apparatus |
| EP1216833B1 (en) * | 2000-11-24 | 2006-06-28 | Goss International Montataire S.A. | Method for regulating the ink-fountain solution balance in a rotary offset printing machine |
| CN201530163U (en) * | 2009-07-23 | 2010-07-21 | 深圳华新彩印制版有限公司 | Printing machine and damping system, damping liquid adding apparatus, and damping additive suction means |
| CN103465657A (en) * | 2013-09-02 | 2013-12-25 | 中国印刷科学技术研究所 | Prediction method of printing color features of different printing materials |
| CN103714245A (en) * | 2013-12-19 | 2014-04-09 | 杭州电子科技大学 | Method for obtaining optimal solid density for coated paper printing |
| CN104742516A (en) * | 2015-03-12 | 2015-07-01 | 周广伟 | High-power image dot coverage rate digital measuring method suitable for whole printing process |
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| CN106891627B (en) | 2019-01-29 |
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Effective date of registration: 20191106 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 DIANZI University |
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Effective date of registration: 20210928 Address after: 410300 No. 203, Dayao Qiangsheng village, Liuyang City, Changsha City, Hunan Province Patentee after: Liuyang Zhongliang Color Printing Co.,Ltd. Address before: 510530 1923, building 3, Ruifeng center, Kaichuang Avenue, Huangpu District, Guangzhou City, Guangdong Province Patentee before: Guangzhou bud rice Intellectual Property Service Co.,Ltd. |
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Granted publication date: 20190129 Termination date: 20220122 |