EP1773603B1 - Security device - Google Patents

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Publication number
EP1773603B1
EP1773603B1 EP05768056.3A EP05768056A EP1773603B1 EP 1773603 B1 EP1773603 B1 EP 1773603B1 EP 05768056 A EP05768056 A EP 05768056A EP 1773603 B1 EP1773603 B1 EP 1773603B1
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EP
European Patent Office
Prior art keywords
area
colour
background
raised line
visual colour
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.)
Active
Application number
EP05768056.3A
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German (de)
English (en)
French (fr)
Other versions
EP1773603A1 (en
Inventor
David Allen Stone
Wendy Victoria Williams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De la Rue International Ltd
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De la Rue International Ltd
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Priority to PL05768056T priority Critical patent/PL1773603T3/pl
Publication of EP1773603A1 publication Critical patent/EP1773603A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B42D2035/24—
    • B42D2035/34—

Definitions

  • the invention relates to a security device and in particular a public recognition security device which is used to give defence against copying and counterfeiting of articles such as security documents including banknotes, travellers cheques, bonds, share certificates, ID cards, passports, security passes, tickets, certificates of authentication, security labels, credit cards, debit cards, etc.
  • security documents including banknotes, travellers cheques, bonds, share certificates, ID cards, passports, security passes, tickets, certificates of authentication, security labels, credit cards, debit cards, etc.
  • GB-A-2241668 reveals how latent images can be produced by blind embossing paper or embossing an area of metallic ink. Such latent images are revealed in contrast when the image is tilted.
  • EP 0194042B1 describes a latent image system which is applied during foil blocking. These line structures also produce a change in contrast.
  • US-A-4124947 describes a method of producing a graphic pattern by providing a line grid or pattern which is substantially uniform at least in given field sections and comprises relatively closely juxtaposed non-intersecting and non-contacting lines.
  • the ratio between the height and the spacing of the colour mounds forming the lines is selected such that when viewing the pattern below a predetermined boundary inclination angle the base of the valleys between the colour mounds or peaks is not visible.
  • CA-A-1019012 describes a latent image system which requires the use of two background line colours which are in register with an embossed line structure. These produce an image by occluding certain parts of the design when viewed at a glancing angle.
  • this approach it is not possible to use this approach to obtain reproducible effects from document to document using standard production techniques as a very high degree of register is required. This is not available with currently used equipment for the production of security documents.
  • a transparent intaglio lined printing can be used or less preferably a pigmented intaglio ink is proposed.
  • the use of a coloured intaglio ink to provide the emboss line was found to markedly reduce the effectiveness of the feature and also suffers from poor reproducibility between background line tints and intaglio.
  • EP 0642933A1 uses a related approach (to CA-A-1019012 ) where a corrugated surface is first produced using an intaglio ink and is overprinted with a lithographic line structure. When viewed at a glancing angle, latent images are apparent. In this case, the intaglio line structures are used as a way of producing an undulating surface. The method also suffers from the difficulty of achieving good register between litho and intaglio so that reproducible latent images cannot be achieved from document to document.
  • US-A-4033059 describes a system capable of producing effective images by intaglio printing.
  • a patterned area of intaglio relief structures forms an image which is hidden within a background area of intaglio. This is overprinted onto a ground design with which the ink contrasts. The image cannot be easily seen when viewed normal to the surface but can be seen when viewed at a glancing angle.
  • EP-A-801604 discloses the enhancement of an embossed security element with a printed image or line screen.
  • WO-A-2004/022355 also discloses a security device in which embossed lines are provided with coatings such that the device presents a different appearance when viewed normally and at an oblique angle. Complex versions of this concept are described in which different line structures are used in combination with the same coatings so that different areas exhibit different colour effects.
  • the security devices may make it difficult to fraudulently copy an article bearing the device, they are difficult to authenticate because of the rather subtle changes in colour which are exhibited.
  • US2003151246 describes a security feature that comprises a printed surface and a partial surface both printed with the same ink.
  • the partial surface being apparent as a result of the ink in that area being a substantially thinner ink film thickness than the printed area.
  • the problem is to provide a security device which not only is difficult accurately to copy but which is easy for a viewer to authenticate.
  • a public recognition security device comprising a planar substrate providing first and second areas, each area having an intaglio printed, raised line structure of spaced apart lines with a background filling the spaces between the lines wherein the visual colour appearance of the lines is different to that of the background, wherein the visual colour appearances of the respective backgrounds and/or of the respective line structures of the two areas differ from one another, and wherein the visual colour appearances of the backgrounds and line structures and the form of the line structures are chosen such that,
  • a public recognition security device comprising a planar substrate providing first and second areas each area having an intaglio printed, raised line structure of spaced apart lines with a background filling the spaces between the lines, wherein the visual colour appearance of the lines is different to that of the background, wherein the visual colour appearances of the respective backgrounds and/or of the respective line structures of the two areas differ from one another, and wherein the visual colour appearances of the backgrounds and line structures and the form of the line structures are chosen such that,
  • a public recognition security device comprising a planar substrate providing first and second areas, one area having a printed, raised line structure of spaced apart lines with a background filling the spaces between the lines
  • the visual colour appearance of the lines is different to that of the background, the other area having a visual colour appearance which is substantially unchanged at all viewing angles, and wherein the visual colour appearance of the background and raised line structure of the one area and the form of the line structure are chosen such that,
  • the advantage of the first aspect is that by having two areas appearing substantially similar when viewed normally but different when viewed at an angle, the change in appearance is obvious as the areas now look different to each other. This is much more obvious than if an area changes in appearance without there being anything to compare it against.
  • the visual colour appearance of an area is defined by a flat or solid colour presented by that area but in other examples the visual colour appearance could bye in the form of stripes or other designs.
  • the raised line structures are printed onto the substrate by intaglio printing.
  • the background visual colour appearance could comprise the natural colour of the substrate or a colour which has been applied e.g. printed, coated, sprayed or transferred onto the substrate. It could be intaglio or non-intaglio printed with a constant tone, cross hatching or the like i.e. optically invariant.
  • the raised line structures are formed by rectilinear lines but the lines could be wavy or curved while the lines are typically continuous but could be broken.
  • Security devices according to the invention can be used with a wide variety of articles of value as mentioned in the introduction.
  • the line structures have line widths and spacings each in the range 30-600 ⁇ m, preferably 50-500 ⁇ m, more preferably 80-400 ⁇ m, most preferably 80-300 ⁇ m.
  • Typical raised print coverage is 30-70%, preferably 35-65%, most preferably 40-60%.
  • white intaglio lines 1A are printed on a black background 1B so as to look substantially the same when viewed normally as a second area 2 with black intaglio 2A printed on a white background 2B, as shown in Figures 1a), 1b) and 1c ).
  • the background colour of Area 1 and/or Area 2 may result from a print or coating on the substrate 3, or may be the colour of the substrate itself.
  • intaglio lines 4 of a certain colour (A) are printed on a background 5 with a different colour (B) so as to look substantially the same as a second area with intaglio lines 6 of colour (B) printed on a background 7 with colour (A), as shown in Figures 2a), 2b) and 2c ).
  • the background colour of Area 1 and/or Area 2 may result from a print or coating on the substrate 3, or may be the colour of the substrate itself. When viewed at an angle only the raised print can be seen visually, so the first area appears colour (A), the second area appears colour (B), as shown in Figures 2d), 2e) and 2f ).
  • the first area 1 has a background colour (A) and intaglio lines with colour (B).
  • the second area 2 has a background colour (C) which may or may not be the same or similar as colour (B) and intaglio lines with colour (D) which may or may not be the same or similar as colour (A), as shown in Figure 3a .
  • the first and second areas are approximately visually colour matched when viewed normally so they appear substantially as a solid flat tint with one colour (E), described in Figure 3a ), b) and c).
  • the background colour of Area 1 and/or Area 2 may result from a print or coating on the substrate, or may be the colour of the substrate itself.
  • intaglio printed line widths may be between 50 and 250 ⁇ m, preferably 80-250 ⁇ m with a raised print coverage of 30-70%.
  • a combination of violet intaglio on yellow background in area 1 and yellow intaglio on a violet background in area 2 could give a colour matched effect when viewed normally when a line width of 80 ⁇ m and a line spacing of 100 ⁇ m is employed.
  • Area 1 could have a red background with green intaglio, appearing brown under normal viewing.
  • Area 2 could have a blue background with orange intaglio, also appearing brown under normal viewing. The two areas would then appear different at a low angle (Area 1 going green and Area 2 going orange).
  • an area with blue intaglio lines with line width 200 ⁇ m and spacing 135 ⁇ m, i.e. approximately 60% coverage, printed over a yellow background will appear blue-green in colour (colour E) when viewed normally (closer to the colour of the intaglio lines than to the background) and blue when viewed at an angle.
  • colour E blue-green in colour
  • an area with blue intaglio lines with line width 135 ⁇ m and 200 ⁇ m spacing (approximately 40% coverage) printed over a yellow background will appear yellow-green when viewed normally (more like the colour of the background), but will switch to blue when viewed at an angle.
  • This effect can be used to improve a colour match between two areas.
  • take area 1 and area 2 which both have an intaglio line width of 140 ⁇ m and a spacing of 140 ⁇ m.
  • a combination of blue intaglio on yellow background in area 1 could appear a bluer green when viewed normally than a combination of yellow intaglio on a blue background in area 2.
  • a line width of 120 ⁇ m and a line spacing of 160 ⁇ m in area 2 it will appear bluer when viewed normally and improve the colour match.
  • the first area has a background colour (A) and intaglio lines with colour (B).
  • the second area has a background colour (C) and intaglio lines with colour (D).
  • Colour C is substantially similar to the appearance of colour B as it appears on background A
  • colour A is substantially similar to the appearance of colour D as it appears on background C.
  • the first and second areas are substantially indistinguishable and appear as a series of stripes when viewed normally. This is described in Figure 5a ), b) and c).
  • the background colour of Area 1 and/or Area 2 may result from a print or coating on the substrate, or may be the colour of the substrate itself. When viewed at an angle, the two areas switch to solid colours (B) and (D) respectively - the colours of the intaglio lines, shown in Figure 5d ), e) and f).
  • Coarser intaglio lines and spacing may enhance this feature.
  • the range of intaglio printed line widths may be between 150 and 450 ⁇ m.
  • violet intaglio with a line width of 300 ⁇ m and a spacing of 400 ⁇ m on yellow background in area 1 would appear as alternating violet and yellow stripes when viewed normally.
  • Yellow intaglio with a line width of 400 ⁇ m and a spacing of 300 ⁇ m on a violet background would also appear as a series of alternating violet and yellow stripes when viewed normally.
  • the two areas would appear substantially similar if the colour of the violet intaglio on yellow background in area 1 were similar to the violet background in area 2 and the colour of the yellow intaglio on violet background in area 2 were similar to the colour of the yellow background in area 1.
  • area 1 When viewed at an angle, area 1 would appear violet and area 2 would appear yellow.
  • the intaglio lines When viewed normally, to give an appearance of continuous lines from the first area to the second area, the intaglio lines may be offset slightly so that the position of the intaglio lines in the first area are in the opposite position to the intaglio lines in the second area i.e. the position of the spacings, as shown in Figure 5a ).
  • the position of the intaglio lines in the first and second areas could be the same as described in Figure 6 - especially if viewed face on, the two areas do not need to visually appear as continuous stripes as in the case of Example 3.
  • the first area has a background colour (A) and intaglio lines with colour (B).
  • the second area has a background colour (C), which may be similar or the same as colour (B) and intaglio lines with colour (D), which may be similar or the same as colour (A).
  • the first area visually appears as colour (E), which is closer to the background colour (A) than intaglio colour (B) when viewed normally, whereas the second area visually appears as colour (F), which is closer to the background colour (C) than intaglio colour (D) when viewed normally.
  • the background colour of Area 1 and/or Area 2 may result from a print or coating on the substrate, or may be the colour of the substrate itself.
  • the two areas When viewed at an angle, the two areas switch in colour to their opposite colour as defined by their intaglio print colours.
  • the first area switches to colour (B) when viewed at an angle from a colour that appears closer to the background colour (A) than intaglio colour (B) when viewed normally.
  • the second area switches to colour (D) when viewed at an a angle - which may be similar or the same as Colour (A) -from a colour that is closer to the background colour (C) - which may be similar or the same as colour (B) when viewed normally. This is shown by Figure 7c ).
  • the range of intaglio printed line widths may be 50-250 ⁇ m and with line width-space to give a raised print coverage of 30-70%, preferably 35-65%, best 40-60%.
  • the line spacing on each area may be made to be greater than the intaglio line width, i.e. the ratio of line width to space may be less than 1.
  • take area 1 and area 2 which both have an intaglio line width and spacing of 140 ⁇ m.
  • a combination of blue intaglio on yellow background in area 1 could appear a bluer green when viewed normally than a combination of yellow intaglio on a blue background in area 2.
  • the switch can be enhanced by making the line spacing greater than the line width.
  • the line widths can be changed to 115 ⁇ m and the line spacing to 165 ⁇ m in both areas 1 and 2. This would make each area appear closer to its background colour than before. Area 1 would appear more yellow than before when viewed normally, and area 2 would appear more blue than before.
  • Area 1 When viewed perpendicularly, Area 1 may then appear yellow-green and Area 2 may appear blue-green.
  • the colour of the raised print in each area will begin to play a larger role in the overall visual appearance of each area and at a particular oblique angle, e, the visual colours of the two areas will switch to the colour of the opposite area when viewed perpendicularly i.e. Area 1 will appear blue-green and Area 2 will appear yellow-green.
  • ⁇ ' when the document is tilted further each area will then appear the same colour as the raised print.
  • Area 1 will appear blue and Area 2 will appear yellow. This is shown in Figures 7a ), b) and c).
  • the two areas may appear the same colour.
  • the two areas could give the appearance of stripes on normal viewing, as opposed to two flat colours.
  • the entire stripy area in Area 1 and Area 2 would appear closer to its background colour than the intaglio colour.
  • raised print line widths of between 150-450 ⁇ m would be preferable.
  • area 1 and area 2 could have a line structure with 260 ⁇ m raised print line width and 340 ⁇ m spacing.
  • Area 1 has blue intaglio on a yellow background and Area 2 has yellow intaglio on blue intaglio.
  • the line structure is such that in both areas when viewed normally they appear as stripes, but the overall area is closer to the background colour i.e. Area 1 appears yellow-green but stripy and Area 2 appears blue-green but stripy. When viewed at an oblique angle each area switches to its raised print colour - Area 1 will now appear as a flat blue colour and Area 2 will appear as a flat yellow colour.
  • the first area has a background colour (A) and intaglio lines with colour (B).
  • the second area has a background colour (C), which may be similar or the same as colour (B) and intaglio lines of colour (D), which may be similar or the same as colour (A).
  • the first area visually appears substantially closer to the intaglio line colour (B) than the background colour (A) when viewed normally, whereas the second area visually appears substantially closer to the intaglio colour (D) than the background colour (C) when viewed normally.
  • the background colour of Area 1 and/or Area 2 may result from a print or coating on the substrate, or may be the colour of the substrate itself. When viewed at an angle, the first area appears as colour (B) and the second area appears as colour (D) - that is, there is only a subtle switch in colours when the colours are viewed at an angle. This is described in Figure 8b ).
  • the range of intaglio printed line widths may be 50-250 ⁇ m and the raised print to spacing ratio should be such that the raised print coverage is between 30-70%, preferably 35-65%, most preferably 40-60%.
  • a method to achieve this effect could be to make the raised print line width on each area greater than the line spacing, i.e. the ratio of line width to space may be greater than 1.
  • area 1 and area 2 may both have an intaglio line width of 140 ⁇ m and a spacing on 140 ⁇ m.
  • a combination of blue intaglio on a yellow background in area 1 could appear substantially the same (green) when viewed normally as a combination of yellow intaglio on a blue background in area 2.
  • the two areas could give the appearance of stripes on normal viewing, as opposed to two flat colours.
  • the entire stripy area in Area 1 and Area 2 would appear closer to its intaglio colour than the background colour.
  • raised print line widths of between 150-450 ⁇ m would be preferable.
  • area 1 and area 2 could have a line structure with 300 ⁇ m raised print line width and 200 ⁇ m spacing.
  • Area 1 has blue intaglio on a yellow background and Area 2 has yellow intaglio on blue intaglio.
  • the line structure is such that in both areas when viewed normally they appear as stripes, but the overall area is closer to the intaglio colour i.e.
  • each area switches to its raised print colour -Area 1 will now appear as a flat blue colour and Area 2 will appear as a flat yellow colour.
  • intaglio lines of colour are printed on a background with a different colour (A) so that when viewed normally it appears substantially the same as a second area which has just a background.
  • This background could be a non-intaglio printed area or an intaglio area printed with a constant tone, cross hatching or the like i.e. optically invariant.
  • the background of the second area is provided by at least colour (C) with or without an additional colour (D).
  • the background colour of area 1 and one of the background colours of area 2 may be the colour of the substrate itself.
  • the first area appears colour (B) - the colour of the intaglio lines.
  • the colour of the second area is unchanged.
  • area 1 could have an intaglio line width of 80 ⁇ m with a line spacing of 80 ⁇ m.
  • a combination of blue intaglio on a yellow background would appear green when viewed normally.
  • Area 2 can be printed with a single colour green to substantially match this appearance. When viewed at an angle area 1 will appear blue and area 2 will remain green. This is shown in Figures 9 a) and b ).
  • area 1 could have an intaglio line width of 250 ⁇ m and a line spacing of 250 ⁇ m. This will appear as blue and yellow stripes.
  • Area 2 can be printed in alternating yellow and blue stripes each 250 ⁇ m width to provide a substantial match to area 1 when viewed normally. When viewed at an angle area 1 will appear blue and area 2 will remain as yellow and blue stripes. This is shown in Figures 9c ) and d).
  • each area includes intaglio lines with fixed line width and print height, as the spacing between the intaglio lines increases, so the viewing angle required to see the colour switch becomes closer to the substrate surface. By decreasing the line spacing, the viewing angle required to see the colour switch becomes closer to the normal viewing position. As a result the switching colour may become more apparent. This is shown in Figures 10 a) and b ).
  • an area with blue intaglio lines with line width 160 ⁇ m and spacing 40 ⁇ m printed over a yellow background will show a colour switch at an angle ⁇ ' to the normal viewing position.
  • an area with blue intaglio lines with line width 160 ⁇ m and spacing 200 ⁇ m printed over a yellow background will show a colour switch at an angle ⁇ which is closer to the substrate surface.
  • the height of the intaglio lines may affect the colour that appears on each area when viewed both normally and at an angle. This is particularly so when the intaglio print colour is much lighter than the background colour, for example yellow intaglio print over a dark blue background.
  • the switching colour will be close to the actual colour of the intaglio ink as it is when it is printed over a white background.
  • the ink film thickness decreases so less ink is put down over the background meaning more of the background colour shows through the intaglio ink.
  • the switching colour will appear as a combination of the intaglio and background colours.
  • the height of the intaglio lines, which comprises the ink height and emboss height, on each area may also affect the viewing angle required to see the colour switch.
  • a low height may mean an angle ⁇ ' that is closer to the substrate surface is required to view the colour switch.
  • An increased intaglio height may mean an angle ⁇ that is closer to the normal viewing position is required to view the colour switch. This is explained in Figures 11 a) and b).
  • the switching colour of each area may be enhanced and more lively when viewed at an angle i.e. the colour will approach the actual intaglio print colour achieved when printed over a white background.
  • the background colour that the intaglio ink is printed over will show through, so the colour that appears when each area is viewed at an angle will be a combination of the intaglio and background colours and will look less like the intaglio colour. This effect is more apparent if a light intaglio colour is chosen e.g. yellow and printed over a dark background e.g. blue.
  • the intaglio inks used on each area should have sufficient opacity to allow greater contrast between the two colours. For example, take area 1 and area 2 both having an intaglio line width of 80 ⁇ m and a line spacing of 100 ⁇ m, with area 1 having red intaglio lines on a blue background and area 2 having blue intaglio lines on a red background. If both the red and the blue intaglio inks are of low opacity then when viewed at a low angle area 1 could appear as a dark red and area 2 appear dark blue, with little contrast in either colour or tone.
  • both the red and blue inks are of high opacity then the two colours that appear when viewed at a low angle may be bright blue and bright red - appearing closer to the colour of the intaglio inks as they appear when printed over a white background, and also appearing strongly contrasting.
  • an area with opaque red intaglio lines on a blue background is compared to a second area with transparent blue intaglio lines on a red background, the colours that appear when viewed at an angle may still be strongly contrasting but may appear as a red and dark blue-black pair.
  • a transparent blue intaglio ink is used on the first area and an opaque blue intaglio ink is used on the second area printed on a red background, an approximate colour match may be obtained when viewed normally, but when viewed at an angle, the first area may appear dark blue-black whereas the second area may appear a much brighter blue.
  • the angle that the switching colours appear may become closer to the normal viewing position, and therefore more obvious, as the opacity of the intaglio inks used on each area increases. If transparent intaglio inks are used on each area, then the angle required to view the switching colours may become closer to the substrate surface and so less obvious.
  • intaglio line width 120 ⁇ m and a line spacing of 120 ⁇ m, with blue intaglio on red background in area 1 and red intaglio on a blue background in area 2.
  • These areas may appear quite different when viewed normally depending on the opacity of the intaglio inks. If both intaglio inks are low opacity then the two areas may appear approximately colour matched when viewed normally. If higher opacity inks are used then the colour of the intaglio print appears closer to the appearance of the intaglio colour as when printed over a white background. This will change the appearance of the areas when viewed normally with the result that the two areas may no longer be matched at all.
  • the colour of the background on each or either area will contribute to the switching colours that appear when each or either area is viewed at an angle. If a dark colour is used as the background e.g. blue with a light colour e.g. yellow intaglio printed over the top, then the colour that appears when the area is viewed at an angle will be darker than the actual intaglio print colour achieved when printed over a white background. Similarly, if a light colour e.g. yellow is used as the background with a dark colour e.g.
  • the two defined areas may be adjacent to each other as in Figure 12a ); separated from each other e.g. in separate corners of a document as in Figure 12b ); separated from each other by utilising additional print areas with or without background print and/or intaglio print in the overall design as in Figure 12c ); overlap slightly as in Figure 12d ); rainbow into each other as in Figure 12e ); or one area could be located within the second area as in Figure 12f ).
  • more than two areas can be utilized e.g. each of the areas can be split into multiple sections (see Figure 12g which is comparable to a chequerboard pattern), and/or extra areas which take on a different appearance to the first two areas may be added (see Figure 12h ).
  • This Figure consists of four different areas Area 1, Area 2, Area 3 and Area 4.
  • Areas 1 and 2 appear colour matched (as Colour E) when viewed normally, but when viewed at an angle appear as different colours (colours B & D) - this is similar to that described in Example 3.
  • Areas 3 and 4 appear as a mismatch when viewed normally and when viewed at an angle appear as a similar mismatch - this is similar to that described in Example 6.
  • Area 2 and Area 4 appear as another mismatch when viewed normally, and then appear colour matched when viewed at an angle.
  • Area 1 and Area 3 also behave in this manner. Of course, any combination of areas may be utilised in this manner.
  • intaglio printed areas are a series of repeated straight lines. These lines do not necessarily have to be straight but could take the form of any shape/design e.g. concentric designs, wavy or curved, circles, triangles, zigzag etc.
  • Figure 13 a illustrates some suitable line structures made up of parallel lines, including lines in the form of triangles, lines with a variation of width along their length, wavy lines and concentric circles.
  • the intaglio lines do not necessarily need to be parallel but can be converging or diverging.
  • Some similar nonparallel structures are shown in Figure 13b ). These include diverging lines, lines with their centre-points varying along their length, non-parallel wavy lines and concentric ellipses.
  • the intaglio printed areas are made up of a series of repeated lines.
  • the lines need not be continuous lines but could take the form of broken lines.
  • the lines could be broken into dashes; dots; repeated shapes and non-repeated shapes which are arranged in a linear fashion. Shapes include circular dots; square dots; triangular dots; star-shaped dots etc.
  • the intaglio printed lines of either area may extend beyond the background colour of the corresponding area, as shown in Figure 14a ).
  • the background colour of either area may extend beyond the intaglio printed lines of either area, as described in Figure 14b ).
  • Shading effects may be possible at the normal viewing position if the intaglio line structure across each area is varied e.g. by increasing or decreasing the spacing or staggering the lines. This may not necessarily cause a similar shading effect when each area is viewed at an angle. Simple shading is highlighted in Figures 15a) and 15b ). It is possible to use this effect in more complicated designs such as a portrait as illustrated in Figures 16a) and 16b ). Darker images are produced by increasing the % coverage of intaglio lines printed in a dark colour over a light coloured background, or by reducing the % coverage of intaglio lines printed in a light colour over a dark background. Alternatively when viewed normally shading effects may be created by varying the colour strength of the background colour in each area.
  • colours may be used for the background and intaglio print of each or either area, but to maximise the impact of the colours that appear when viewed at an angle, colours pairs that strongly contrast each other could be used e.g. blue-yellow; blue-red; red-yellow; violet-orange; violet-yellow; red-green; black-white etc.
  • an area with a blue-yellow colour pair may have a background with PANTONE 2955M colour (blue) and a raised print with visual colour of PANTONE YELLOW M (yellow).
  • an area with a red-yellow colour pair may have a background colour of PANTONE 130M (yellow) and a raised print with visual colour of PANTONE 1788M (red).
  • Another example may show an area with a violet-orange colour pair that may have a background colour of PANTONE 153M (orange) with a raised print line structure with visual colour of PANTONE 2957M (violet).

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
EP05768056.3A 2004-08-03 2005-08-02 Security device Active EP1773603B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05768056T PL1773603T3 (pl) 2004-08-03 2005-08-02 Urządzenie zabezpieczające

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0417291.2A GB0417291D0 (en) 2004-08-03 2004-08-03 Security device
PCT/GB2005/003030 WO2006013352A1 (en) 2004-08-03 2005-08-02 Security device

Publications (2)

Publication Number Publication Date
EP1773603A1 EP1773603A1 (en) 2007-04-18
EP1773603B1 true EP1773603B1 (en) 2014-03-26

Family

ID=32982455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05768056.3A Active EP1773603B1 (en) 2004-08-03 2005-08-02 Security device

Country Status (8)

Country Link
EP (1) EP1773603B1 (es)
AU (1) AU2005268661B2 (es)
EA (1) EA010332B1 (es)
ES (1) ES2459615T3 (es)
GB (1) GB0417291D0 (es)
MY (1) MY143640A (es)
PL (1) PL1773603T3 (es)
WO (1) WO2006013352A1 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070279718A1 (en) * 2006-05-31 2007-12-06 Cabot Corporation Reflective features with co-planar elements and processes for making them
US9533523B2 (en) 2006-05-31 2017-01-03 Sicpa Holding Sa Reflective features with co-planar elements and processes for making them
DE102006050290A1 (de) * 2006-10-23 2008-04-30 Giesecke & Devrient Gmbh Sicherheitselement mit einer optisch variablen Struktur
US8310718B2 (en) 2009-03-16 2012-11-13 Xerox Corporation High resolution scalable gloss effect
GB0914655D0 (en) 2009-08-21 2009-09-30 Eastman Kodak Co Structural inks
RU2440248C1 (ru) 2010-08-03 2012-01-20 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Носитель информации с оптически переменной структурой (варианты)
CN103895374B (zh) * 2013-11-01 2016-09-14 中钞油墨有限公司 具有光变结构的防伪图纹及其制备方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033059A (en) * 1972-07-06 1977-07-05 American Bank Note Company Documents of value including intaglio printed transitory images
FI67194C (fi) * 1975-11-14 1985-02-11 Orell Fuessli Graph Betr Ag Grafisk modell och foerfarande foer dess framstaellning
DE19541064A1 (de) * 1995-11-03 1997-05-07 Giesecke & Devrient Gmbh Datenträger mit einem optisch variablen Element
DE10015097A1 (de) * 2000-03-28 2001-10-04 Giesecke & Devrient Gmbh Im Stichtiefdruck bedruckter Datenträger

Also Published As

Publication number Publication date
EA200700285A1 (ru) 2007-08-31
GB0417291D0 (en) 2004-09-08
EP1773603A1 (en) 2007-04-18
AU2005268661A1 (en) 2006-02-09
AU2005268661B2 (en) 2008-12-04
PL1773603T3 (pl) 2014-07-31
WO2006013352A1 (en) 2006-02-09
ES2459615T3 (es) 2014-05-12
MY143640A (en) 2011-06-15
EA010332B1 (ru) 2008-08-29

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