EP2421711A1 - Verfahren zur bestimmung der qualität eines druckprodukts - Google Patents
Verfahren zur bestimmung der qualität eines druckproduktsInfo
- Publication number
- EP2421711A1 EP2421711A1 EP10713451A EP10713451A EP2421711A1 EP 2421711 A1 EP2421711 A1 EP 2421711A1 EP 10713451 A EP10713451 A EP 10713451A EP 10713451 A EP10713451 A EP 10713451A EP 2421711 A1 EP2421711 A1 EP 2421711A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- quality
- substrate
- metallic
- metallized
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000007704 transition Effects 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 12
- 238000004886 process control Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
-
- 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
- G01N21/8806—Specially adapted optical and illumination features
-
- 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
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8829—Shadow projection or structured background, e.g. for deflectometry
-
- 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
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N2021/8918—Metal
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/57—Measuring gloss
Definitions
- the invention relates to a method for determining the quality of a printed product, namely for determining the quality of a metallic or metallized reflective layer applied to a substrate, according to the preamble of claim 1.
- Criteria for assessing the quality of such substrates provided with a metallic or metallized, reflecting layer are the homogeneity of the layers, the gloss, the brilliance or the optical mirror effect of the same. So far, no methods are known by means of which the quality of such applied to a substrate, metallic or metallized, reflective layers can be easily and reliably determined or assessed.
- the present invention is based on the problem of providing a novel method for determining the quality of a printed product, namely for determining the quality of a metallic or metallized reflective layer applied to a printing substrate.
- This problem is solved by a method according to claim 1.
- a pattern with step-like light-dark transitions is projected onto a printed product to be assessed with regard to its quality by means of a projection template, the pattern projected onto the printed product being measured with the aid of a camera in that brightness values of the light-dark transitions of the pattern projected onto the printed product are determined, and the brightness values are used to conclude the quality of the metallic or metallized reflective layer.
- the pattern projected onto the printing substrate has step-like and thus high-contrast light-dark transitions.
- the pattern projected onto the printing substrate is measured, namely such that brightness values of the light-dark transitions of the pattern are determined. From the thus determined brightness values of the light-dark transitions of the pattern projected onto the printing material, it is concluded that the quality of the metallic or metallized, reflecting layer.
- a simple and reliable quality control of such metallic or metallized layers, which are applied to a substrate possible.
- Fig. 1 a schematic representation to illustrate the inventive method. The method according to the invention for determining the quality of a metallic or metallized reflective layer applied to a printing substrate will be described in detail below with reference to FIG.
- FIG. 1 shows a printing substrate 10 or a printed product to which a metallic or metallized reflective layer has been applied, for example, by means of the process known from EP 0 578 706 B1.
- metallic or metallized layer is a sample 12 is projected onto the substrate in the metallic or metallized layer using a projection 11, wherein on the substrate 10 in the range to be checked, metallic or metallized layers projected pattern 12 includes step-like and therefore high-contrast light-dark transitions.
- the pattern 12 comprises a plurality of mutually parallel black and white bars in order to provide the step-like and therefore high-contrast light-dark transitions.
- the pattern 12 shown in FIG. 1 is visible on the printing substrate 10 in a plan view in the viewing direction X. It should be noted that the pattern 12 shown in FIG. 1 is merely of an exemplary nature. Any pattern with step-like or high-contrast light-dark transitions can be projected onto the printing substrate 10 in the region of the metallic or metallized layer to be checked, such as, for example, checkerboard patterns.
- the projection original 11 may be, for example, an incident-light projection template or else a transmitted-light projection template.
- the pattern 12 projected onto the printing substrate 10 in the region of the metallized or metallic layer is measured in such a way that brightness values of the light-dark transitions of the pattern 12 projected onto the printing substrate 10 are determined.
- the quality of the metallic or metallized layer applied to the printing substrate 10 is such that, if the brightness values are greater than a defined limit value, the quality of the metallic material is high or metallized layer, whereas when the brightness values are less than a defined threshold, poor quality is inferred.
- the pattern 12 is projected onto the printing substrate 10 with the aid of the projection original 11 such that the projection original 11 is inclined to the printing substrate 10, namely such that the distance ⁇ dn of the Projection template 11 to the substrate 10 changes.
- the camera 13 is also inclined to the printing material 10, so that the distance ⁇ di3 of the camera 13 to the printing substrate 10 also changes.
- a pattern with light-dark transitions project and the projected pattern using a camera be measured and evaluated so that it is concluded from brightness values on the quality of the metallic or metallized, reflective layer and thus on the quality of the application of this layer to the substrate.
- the method can be performed offline for printing outside of a printing press, in particular a sheet-fed press.
- the method is preferably carried out in the region of a measuring table, in which case the print product to be assessed with regard to its quality is measured in the region of an eve base, so that the printed product to be measured is aligned.
- it is also possible to carry out the process inline for printing within a printing press for example within printing units of a sheet-fed printing machine, in which case the quality product to be assessed in terms of its quality in the region of a curved base, namely a curved printing press cylinder is measured.
- the printed product to be measured is then arched, whereby bulging effects can be computationally compensated in the measuring method.
- the method according to the invention inline to the printing process, it is also possible to measure the print products to be assessed in terms of its quality in the area of a flat base, for example in the area of a cantilever of a sheet-fed printing press.
- the quality of the metallic or metallized layer determined by the method according to the invention can be used for inline process control or inline process control.
- it may be provided to automatically eject waste copies from a printing process on the basis of the quality of the metallic or metallized layer determined according to the invention. It is also possible, based on the determined quality of the metallic or metallized layer, to influence process parameters which serve to apply the same to the printing material.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009002569A DE102009002569A1 (de) | 2009-04-22 | 2009-04-22 | Verfahren zur Bestimmung der Qualität eines Druckprodukts |
| PCT/EP2010/054741 WO2010121913A1 (de) | 2009-04-22 | 2010-04-12 | Verfahren zur bestimmung der qualität eines druckprodukts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2421711A1 true EP2421711A1 (de) | 2012-02-29 |
Family
ID=42133506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10713451A Withdrawn EP2421711A1 (de) | 2009-04-22 | 2010-04-12 | Verfahren zur bestimmung der qualität eines druckprodukts |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2421711A1 (de) |
| DE (1) | DE102009002569A1 (de) |
| WO (1) | WO2010121913A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12044621B2 (en) * | 2022-07-28 | 2024-07-23 | Axalta Coating Systems Ip Co., Llc | Method and system for matching color and/or appearance of a surface |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4110801C1 (de) | 1991-04-04 | 1992-05-27 | Kurt 4040 Neuss De Lappe | |
| JPH0518728A (ja) * | 1991-07-12 | 1993-01-26 | Ricoh Co Ltd | 表面検査装置 |
| DE19757106A1 (de) * | 1997-12-20 | 1999-06-24 | Juergen Prof Dr Massig | Topometer für spiegelnde Flächen |
| JP3688520B2 (ja) * | 1999-07-06 | 2005-08-31 | 住友化学株式会社 | 表面検査装置及び表面検査方法 |
| JP3757694B2 (ja) * | 1999-08-25 | 2006-03-22 | トヨタ自動車株式会社 | 表面欠陥検査方法 |
| DE10205132A1 (de) * | 2002-02-07 | 2003-08-28 | Bfi Vdeh Inst Angewandte Forschung Gmbh | Verfahren und Vorrichtung zum optischen Messen der Oberflächenform und zur optischen Oberflächeninspektion von bewegten Bändern in Walz- und Weiterbearbeitungsanlagen |
| DE10300482B3 (de) * | 2003-01-08 | 2004-07-08 | Uwe Peter Braun | Verfahren und Vorrichtung zur Erkennung von Oberflächenfehlern an Werkstücken mit glänzenden Oberflächen |
| DE102006006876A1 (de) * | 2006-02-15 | 2007-08-16 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Verfahren und Vorrichtung zum Erfassen einer Kontur einer reflektierenden Oberfläche |
| DE102006015249A1 (de) * | 2006-04-01 | 2007-10-04 | Man Roland Druckmaschinen Ag | Druckmaschine mit Prägeeinrichtung |
| DE102007063529A1 (de) * | 2007-12-27 | 2009-07-23 | Carl Zeiss Ag | Verfahren und Vorrichtung zum optischen Inspizieren einer Oberfläche an einem Gegenstand |
-
2009
- 2009-04-22 DE DE102009002569A patent/DE102009002569A1/de not_active Withdrawn
-
2010
- 2010-04-12 EP EP10713451A patent/EP2421711A1/de not_active Withdrawn
- 2010-04-12 WO PCT/EP2010/054741 patent/WO2010121913A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010121913A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009002569A1 (de) | 2010-10-28 |
| WO2010121913A1 (de) | 2010-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1395438B1 (de) | Wertpapier und verfahren zu seiner herstellung | |
| DE102010047926B4 (de) | Verfahren zum gerasterten Aufbringen von Fluiden auf Substrate | |
| CH707652B1 (de) | Optische Sicherheitsvorrichtung mit Nanoteilchentinte und Verfahren zur Herstellung. | |
| DE102009033221A1 (de) | Sicherheitselement zur Kennzeichnung oder Identifikation von Gegenständen und Lebewesen | |
| DE10233928A1 (de) | Verfahren und Vorrichtung zur Echtheitsprüfung eines Sicherheitselements | |
| DE102008063471A1 (de) | Sicherheitselement mit Wasserzeichen | |
| EP2694296B1 (de) | Optisch variables sicherheitsmerkmal | |
| DE102008058397A1 (de) | Wertdokument mit matten und glänzenden Oberflächenbereichen und Verfahren zu seiner Herstellung | |
| DE102016010078A1 (de) | Optisch variables Sicherheitselement mit Dünnschichtelement | |
| DE102016213111B4 (de) | Inspektionssystem mit mehreren Erfassungsbereichen | |
| DE112013002063T5 (de) | Optische Sicherheitsvorrichtung | |
| EP2421711A1 (de) | Verfahren zur bestimmung der qualität eines druckprodukts | |
| DE102005003839A1 (de) | Sicherheitsmarkierung | |
| DE102006061905A1 (de) | Sicherheitselement | |
| DE69109647T2 (de) | Bedruckbarer Bogen zur Herstellung von Sicherheitsdokumenten mit einem Mittel gegen Nachahmung oder für Beglaubigung. | |
| EP3009272A2 (de) | Druckerzeugnis mit optischem sicherheitsmerkmal | |
| DE102009005773B4 (de) | Verfahren zum Herstellen von Hologrammen und hergestellte Hologramme | |
| DE102008052248B4 (de) | Verfahren und Vorrichtung für die Überprüfung von Linsenstrukturen | |
| WO2020094494A1 (de) | Sicherheitselement mit einander räumlich zugeordneten strukturelementen in verschiedenen schichten | |
| AT502069B1 (de) | Verfahren und einrichtung zum prüfen von gegenständen | |
| EP2974877B1 (de) | Verfahren zur herstellung eines wertdokuments mit auf-/durchsichtseffekt | |
| DE102013216424A1 (de) | Bildgebendes Verfahren zur Segmentierung einer Beschichtung auf einem Substrat | |
| DE102007044623A1 (de) | Verfahren zum Bedrucken eines Bedruckstoffs | |
| DE60133523T2 (de) | Bedruckbare wassergezeichnete Papiere | |
| DE3319018A1 (de) | Verfahren zum verbessern der korrosionsbestaendigkeit einer matrize |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20111122 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHOELZIG, JUERGEN Inventor name: GEBHARDT, RAINER Inventor name: TREISS, WOLFGANG |
|
| 19U | Interruption of proceedings before grant |
Effective date: 20120201 |
|
| 19W | Proceedings resumed before grant after interruption of proceedings |
Effective date: 20121203 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MANROLAND SHEETFED GMBH |
|
| 19W | Proceedings resumed before grant after interruption of proceedings |
Effective date: 20121203 |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Effective date: 20140121 |