CN106976314B - Method for establishing a pre-conditioning characteristic curve - Google Patents
Method for establishing a pre-conditioning characteristic curve Download PDFInfo
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- CN106976314B CN106976314B CN201610865450.6A CN201610865450A CN106976314B CN 106976314 B CN106976314 B CN 106976314B CN 201610865450 A CN201610865450 A CN 201610865450A CN 106976314 B CN106976314 B CN 106976314B
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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
- B41F33/16—Programming systems for automatic control of sequence of operations
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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
- B41F33/0009—Central control units
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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
- B41F33/04—Tripping devices or stop-motions
- B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2233/00—Arrangements for the operation of printing presses
- B41P2233/10—Starting-up the machine
- B41P2233/11—Pre-inking
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- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
The invention relates to a method for establishing a pre-adjustment characteristic curve of a new printing ink in a machine for processing printing materials, the new printing ink not having a known pre-adjustment characteristic curve, by a computer, the method comprising the following steps: inputting a color model value for the new ink; the color model value of the new ink is compared to the following color model values: the color model value is associated with an existing preconditioned characteristic curve stored in the database, and the difference between the color model value of the new ink and the stored color model value is determined; selecting a stored color model value having the smallest difference to the new ink color model value, and selecting a pre-conditioning characteristic associated with the selected color model value; the selected characteristic curve is adapted by correcting the obtained color model difference value; the adapted characteristic curve is stored as a new pre-adjustment characteristic curve for the new ink and is applied to the ink pre-adjustment.
Description
Technical Field
The invention relates to a method for establishing a pre-conditioning characteristic curve for calibrating printing ink in a machine for processing printing material. The present invention is in the technical field of electronic replication technology.
Background
The calibration of the ink set is carried out both manually by the printing press personnel and automatically by a control computer within the printing press, the principle of the calibration remains the same regardless of the type of conversion of the ink set, for modern printing machines, the calibration is typically accomplished by computer control, a characteristic curve, so-called preconditioned characteristic curve for each ink, is stored in a preconditioned digital database and is available to the control computer of the printing press, the control computer has the authority to adjust the database, the ink characteristic curve needs to be used for ink control within the ink mechanism within the printing press when a new printing job is performed, and the ink set is typically taken out on a printing substrate, i.e., the ink set, and is used to adjust the ink set to the pre-set characteristic curve, and is calculated by the printing press, and is used to adjust the characteristic curve (the characteristic curve is calculated by the printing press) and is calculated by the pre-preset characteristic curve, and is calculated by the printing press, and is used to adjust the pre-set characteristic curve, and is calculated by the pre-adjusted to the pre-set characteristic curve for each ink set, the pre-adjusted characteristic curve, the pre-adjusted ink set, the pre-adjusted characteristic curve is calculated by the pre-adjustment data, the pre-adjusted ink set pre-adjustment data, the pre-adjustment curve is stored in the pre-adjustment data, the pre-adjustment data is stored in the pre-adjustment data, the pre-adjustment data is stored, the pre-adjustment data, the printing press, the pre-adjustment data is stored, the pre-adjustment data, the pre-adjusted ink set, the pre-adjustment data, the printing press is stored, the pre-adjusted ink set, the pre-adjustment data, the pre-adjusted ink set, the pre-adjustment data, the printing press, the pre-adjustment data, the pre-adjusted ink characteristics of the printing press, the pre-adjustment data, the printing ink is stored, the printing press, the printing ink characteristics of the printing press, the printing ink characteristics of the printing press is stored, the printing ink characteristics of the printing ink is stored, the printing press, the printing ink characteristics of the printing press, the printing ink characteristics of the printing press, the printing ink characteristics of the printing ink is stored, the printing ink characteristics of the printing press, the printing ink is stored, the printing ink characteristics of the printing press, the printing ink is stored, the printing ink characteristics of the printing ink is stored, the printing press, the printing ink characteristics of the printing press, the printing ink characteristics of the printing press, the printing ink characteristics of the printing press is stored, the printing press, the printing ink is read, the printing press, the printing ink characteristics of the printing press, the printing press.
Disclosure of Invention
The invention aims to provide the following steps: a method for creating a preconditioning characteristic curve for new printing inks which do not have a known preconditioning characteristic curve is proposed, in which method no long-term learning of the preconditioning characteristic curve and thus no correspondingly large number of waste sheets is required. The solution according to the invention based on this task is: a method is proposed for establishing, by a computer, a pre-conditioning characteristic curve of a new printing ink in a machine for processing printing material, the new printing ink not having a known pre-conditioning characteristic curve, the method comprising the following steps: inputting a color model value (Lab value) for the new ink; the color model value of the new ink is compared to the following color model values: the color model value is associated with an existing preconditioned characteristic curve stored in the database, and the difference between the color model value of the new ink and the stored color model value is determined; selecting a stored color model value having the smallest difference to the new ink color model value, and selecting a pre-conditioning characteristic associated with the selected color model value; the selected characteristic curve is adapted through correcting the obtained color model difference value; the adapted characteristic curve is stored as a new pre-adjustment characteristic curve for the new ink and is applied to the ink pre-adjustment. In the solution according to the invention of the proposed task, the machine characteristics of the previous printing task are not stored in the database of the control computer, but rather the ink preconditioning characteristic itself. These ink preconditioning profiles also contain color model values for the respective inks used. Since the target ink value which is to be achieved in the current print job can be determined from the preceding data of the print job, the color model value for the new ink is naturally also known from these data, and a pre-adjustment characteristic curve for this color model value is to be established. At this time, with the help of the known color model value of the new ink, a characteristic curve whose color model value deviates as little as possible from the target color model value of the new ink with respect to the ink used is searched for in the database. The ink preconditioning characteristic curve is then selected (which has the smallest deviation of the color model values) and adapted by means of the difference between the color model values of the new ink and the used ink from the database. The ink preconditioning characteristic adapted in this way is then stored and applied by the control computer as a new preconditioning characteristic for the new ink. Since this new adapted ink preconditioning characteristic curve is much closer to the optimum new ink preconditioning characteristic curve than the previously applied green-point characteristic curve, the characteristic curve learning process for the ink preconditioning characteristic curve can be significantly shortened and the waste page costs correspondingly reduced. Advantageous and further preferred developments of the method result from the description of the specific embodiments and the figures. Preferred developments of the method according to the invention are: and directly inputting the color model value of the new ink by a user. Here, the user of the printing press can input the color model value of the new ink of the previous stage data by directly inputting the color model value of the new ink to the control computer. Preferred developments of the method according to the invention are: the color model is directly input by preceding stage data or automatically by performing proofing. If the color model value can be derived from the pre-printing data, it is also possible to print a short proof with the new ink and then determine the color model value of the new ink by measurement with an ink measuring instrument. The color model values thus determined can be automatically applied to the method according to the invention by the control computer of the printing press. There is also a possibility: the color model value of the new ink is directly and automatically obtained from the pre-printing stage data by the control computer. Preferred developments of the method according to the invention are: in the case of adapting the selected characteristic curve to the ink by correcting the found difference, the dependence on the respectively used printing substrate is also taken into account. In order to ensure a more precise adaptation of the selected ink preconditioning characteristic, it is proposed that: in addition to the determined difference of the color model values, the printing substrate used and its dependency in the case of the selected ink preconditioning characteristic and the current print job, respectively, are also taken into account. Preferred developments of the method according to the invention are: in order to take into account the substrate dependency, the respectively used substrate is also stored in the characteristic database together with the stored preconditioning characteristic. In order to be able to take into account the substrate correlation when the selected ink preconditioning characteristic is adjusted, the printed substrates used in each case must naturally also be stored in the database together with the characteristic itself. Only then can they be taken into account during the selection or adaptation of the ink preconditioning characteristic. Preferred developments of the method according to the invention are: the difference between the color model value of the new ink and the color model value of the preconditioned characteristic curve for the ink that has been used is found by means of Delta E or color coordinates. The difference can be determined by Delta E or color coordinates. In this case, the ink deviations between the new ink and each used ink are calculated in an ink database of the machine. This calculation method is in accordance with methods known from the prior art, in which adjustment recommendations for the printing press are calculated from the chromatographic measured values. Preferred developments of the method according to the invention are: the adapted, selected pre-adjustment characteristic curve is used for ink pre-adjustment in the printing press, by means of which the calculation of the inking zone is carried out and by means of which the adjustment of the ink fountain roller, the ink path and the ink color compensation function is carried out. The already mentioned important ink preconditioning can be carried out in the printing press with the aid of the adapted new preconditioning characteristic. Preferred developments of the method according to the invention are: as further parameters for selecting the most suitable pre-conditioning characteristic, in addition to the color model value, at least one parameter from the following group is also taken into account: ink density, ink layer thickness, or ink basis weight. In addition to the color model value of the new ink, other parameters in the pre-conditioning characteristic must also be taken into account. The method according to the invention can be further refined if the ink density of the new ink is used as a selection parameter for the most suitable preconditioning characteristic. The ink density is determined from the parameters of the ink layer thickness and the pigment number, the latter being able to be described by the weight per unit area of the ink. The use of ink density as a selection parameter complicates the selection of the most suitable preconditioning characteristic, but makes the selection more accurate.
Description of the drawings: the method and functionally advantageous further developments of the method are described further below with reference to the attached drawing in accordance with at least one preferred embodiment. In the drawings, mutually corresponding elements are denoted by respectively identical reference numerals. The figures show: fig. 1 is a schematic view of a printing press system to which the method according to the invention is applied, and fig. 2 is a schematic view of the flow of the method according to the invention.
The method according to the invention is applied in a printing press system 2 in its preferred embodiment, the printing press system 2 is schematically illustrated in fig. 1, the printing press system 2 has a printing press 3, the printing press 3 is intended for calibrating a printing job being queued, the printing press 3 is monitored by a control computer 4, the control computer 4 has the authority to retrieve a database 9, an ink pre-adjustment characteristic curve 6 of the inks used up to now is stored in the database 9, the method according to the invention proceeds from the pre-adjustment characteristic curve 6 to the database 9 of the control computer 4, the characteristic curve 6 is ink-specific, i.e. there is at least one characteristic curve 6 for each ink (Color), the Color model values of the inks and the type of substrate to which the printing job is applied are stored by means of the ink pre-adjustment characteristic curve 6, if the characteristic curve 6 is stored in a pre-adjustment characteristic curve database 7, the ink pre-adjustment characteristic curve 5 is stored in a pre-adjustment characteristic curve database 7, the pre-adjustment characteristic curve 5, the characteristic curve 6 is stored in a pre-adjustment curve 5, the pre-adjustment characteristic curve 5 is calculated by a pre-adjustment curve 5, the pre-adjustment characteristic curve is stored in a pre-adjustment curve 5, the pre-adjustment characteristic curve 6 is stored in a new ink pre-adjustment characteristic curve 5, the pre-adjustment characteristic curve 5 is calculated by a pre-adjustment curve 5, the pre-adjustment curve 6 is stored in a pre-adjustment characteristic curve 5, the pre-adjustment characteristic curve is stored in the pre-adjustment characteristic curve 5, the pre-adjustment characteristic curve is stored in a new ink pre-adjustment curve 5, the pre-adjustment curve 5, if the pre-adjustment curve is stored, the ink pre-adjustment curve is stored in the pre-adjustment curve 5, the ink pre-adjustment curve is stored in the pre-adjustment characteristic curve 5, the ink-adjustment curve is stored in the ink-adjustment curve 5, the ink-adjustment curve is stored, the ink-adjustment curve 5, the ink-adjustment curve is stored in the ink-adjustment curve, the ink-adjustment curve is stored, the ink-adjustment curve 5, the ink-adjustment curve is stored in the ink-adjustment curve 2, the ink-adjustment curve is stored, the ink-adjustment curve is stored in the ink-adjustment curve, the ink-adjustment curve is stored, the ink-adjustment curve is stored in the ink-adjustment curve is stored, the ink-adjustment curve is stored, the ink-associated with the ink-adjustment curve, the ink-adjustment curve is stored in the ink-adjustment curve, the ink-adjustment curve is stored, the ink-
Claims (8)
1. A method for establishing a pre-conditioning characteristic curve (8') of a new printing ink in a machine for processing printing material by means of a computer (4), the new printing ink not having a known pre-conditioning characteristic curve, the method comprising the steps of: inputting a color model value (5) for the new ink; comparing the color model value (5) of the new ink with the following color model values: the color model value is associated with an existing pre-conditioning characteristic curve (6) stored in a database (9), and a difference (7) between the color model value (5) of the new ink and the stored color model value is determined; selecting a stored color model value having the smallest difference to the color model value (5) of the new ink, and selecting a pre-conditioning characteristic curve (8) associated with the selected color model value; adapting the selected characteristic curve (8) by modifying the determined color model difference (7); storing the adapted characteristic curve (8 ') as a new pre-conditioning characteristic curve (8 ') for new ink and applying this characteristic curve (8 ') to ink pre-conditioning, wherein in the database (9) no machine characteristics of previous printing jobs are stored.
2. Method according to claim 1, characterized in that the color model (5) values of the new ink are directly input by the user (1) for the color model.
3. The method according to claim 1, characterized in that the direct input of the color model from the preceding data is automatically performed by performing a proofing.
4. Method according to one of claims 1 to 3, characterized in that, in the case of adaptation of the selected characteristic curve (8) to the ink by correction of the ascertained difference (7), the correlation with the respectively used printing substrate is also taken into account.
5. Method according to claim 4, characterized in that, in order to take into account the substrate dependency, the respectively used substrate is also stored in the characteristic database (9) together with the stored pre-conditioning characteristic (6).
6. Method according to any one of claims 1 to 3, characterized in that the difference (7) between the colour model value (5) of the new ink and the colour model value of the preconditioned characteristic curve of the already used ink is found by means of Delta E or colour coordinates.
7. Method according to one of claims 1 to 3, characterized in that an adapted pre-adjustment characteristic curve (8') is used for ink pre-adjustment in the machine by means of which the calculation of the inking zone and the adjustment of the ink fountain roller, ink path and ink color compensation function are carried out.
8. Method according to one of claims 1 to 3, characterized in that, as further parameters for selecting the most suitable preconditioning characteristic (8), at least one parameter from the following group is taken into account in addition to the color model value: ink density, ink layer thickness, or ink basis weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015219249.0 | 2015-10-06 | ||
| DE102015219249 | 2015-10-06 |
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| Publication Number | Publication Date |
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| CN106976314A CN106976314A (en) | 2017-07-25 |
| CN106976314B true CN106976314B (en) | 2020-05-22 |
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| CN201610865450.6A Active CN106976314B (en) | 2015-10-06 | 2016-09-29 | Method for establishing a pre-conditioning characteristic curve |
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| CN (1) | CN106976314B (en) |
| DE (1) | DE102016217075A1 (en) |
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| CN111959120B (en) * | 2020-08-24 | 2021-06-04 | 深圳市浩立信图文技术有限公司 | Ink control system and ink control method of digital printing machine |
| DE102021132915A1 (en) | 2021-12-14 | 2023-06-15 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for operating a printing machine with a machine control |
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| EP0403861B1 (en) * | 1989-06-19 | 1994-08-31 | Heidelberger Druckmaschinen Aktiengesellschaft | Method of rapid attainment of print-readiness |
| DE19844495B4 (en) | 1998-09-29 | 2005-04-07 | Man Roland Druckmaschinen Ag | Method for color calibration by means of color management for a digitally controllable printing press with a rewritable printing form |
| JP2005198025A (en) * | 2004-01-07 | 2005-07-21 | Dainippon Screen Mfg Co Ltd | Method for modifying color profile |
| CN1749005A (en) * | 2004-09-13 | 2006-03-22 | 海德堡印刷机械股份公司 | Method of setting optimized pre-inking prior to the start of printing |
| JP4355664B2 (en) * | 2005-02-16 | 2009-11-04 | キヤノン株式会社 | Color processing method and apparatus |
| DE102008013744A1 (en) | 2007-04-02 | 2008-10-09 | Heidelberger Druckmaschinen Ag | Improved characteristic learning in printing presses |
| US8213051B2 (en) * | 2009-07-16 | 2012-07-03 | Infoprint Solutions Company Llc | Color management workflow for transitioning offset printing using custom inks to digital printing |
| CN102082894B (en) * | 2009-11-27 | 2013-01-23 | 北大方正集团有限公司 | Equipment calibration method and output device |
| DE102011012289A1 (en) * | 2010-03-24 | 2011-09-29 | Heidelberger Druckmaschinen Ag | Method for adjusting color of printing machine e.g. sheet-fed offset printing machine, involves calculating ink zone- and actual setting values for color of actual print job based on values of another print job |
| CN102975502B (en) * | 2011-09-05 | 2016-12-21 | 北大方正集团有限公司 | Printer calibration steps and device for color management |
| DE102013016448A1 (en) * | 2012-10-26 | 2014-04-30 | Heidelberger Druckmaschinen Ag | Method for execution of adjustments in printing machine by processor, involves calculating new characteristic curve from substitute characteristic curve and measuring values, where adjustments take place based on new characteristic curve |
| CN103873736B (en) * | 2012-12-17 | 2017-03-22 | 北大方正集团有限公司 | Color closed-loop correction method and system based on multi-dimensional table |
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| CN106976314A (en) | 2017-07-25 |
| DE102016217075A1 (en) | 2017-04-06 |
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