GB2345879A - A security article eg a document or game ticket, including a liquid crystal or thermochromic ink - Google Patents
A security article eg a document or game ticket, including a liquid crystal or thermochromic ink Download PDFInfo
- Publication number
- GB2345879A GB2345879A GB9928557A GB9928557A GB2345879A GB 2345879 A GB2345879 A GB 2345879A GB 9928557 A GB9928557 A GB 9928557A GB 9928557 A GB9928557 A GB 9928557A GB 2345879 A GB2345879 A GB 2345879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- information
- document
- liquid crystal
- security
- predetermined conditions
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 235000013305 food Nutrition 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 230000002441 reversible effect Effects 0.000 claims abstract description 3
- 239000000976 ink Substances 0.000 claims description 53
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 abstract description 2
- 229940079593 drug Drugs 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 235000019219 chocolate Nutrition 0.000 description 1
- 235000020965 cold beverage Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 235000012171 hot beverage Nutrition 0.000 description 1
- 235000021268 hot food Nutrition 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/02—Arrangements or devices for indicating incorrect storage or transport
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F3/00—Board games; Raffle games
- A63F3/06—Lottos or bingo games; Systems, apparatus or devices for checking such games
- A63F3/065—Tickets or accessories for use therewith
- A63F3/0685—Tickets or accessories for use therewith having a message becoming legible after a chemical reaction or physical action has taken place, e.g. applying pressure, heat treatment, spraying with a substance, breaking microcapsules
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Credit Cards Or The Like (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Printing Methods (AREA)
Abstract
A security article, such as a document, bears information partly in a permanently visible form and partly in a liquid crystal ink which only becomes visible on subjecting the article to predetermined conditions. Both parts of the information are required to obtain its meaning. Alternatively, e.g. in a game ticket, both invalid and valid information are printed, and under predetermined conditions the invalid information disappears to leave the valid result. The conditions may heating; or exposure to UV radiation or moisture. The change may not be reversible. The article may be a container for food or drink, an adhesive label (eg for a video tape, event ticket or drug packet) or an envelope. The article may be a two-part substrate comprising the printed surface 3 of a container and a clear sheet 4 with a thermochromic ink which reveals the message when cooled.
Description
SECURITY ARTICLES
This invention relates to security articles, in particular security documents, for example tickets, game cards and product labels, but also to other articles having a security aspect.
Liquid crystal"inks"such as microencapsulated liquid crystal compositions are known which can change their appearance when subjected to certain conditions such as heating, cooling or illumination with ultraviolet light.
For example, thermochromic ink which when printed is colourless and invisible can acquire colour and become visible at a predetermined temperature or over a range of temperatures or vice versa. Thermochromic inks other than of the liquid crystal type are also known.
From a first aspect, the present invention provides a security article, such as a document, bearing information partly in permanently visible form (e. g. a permanently visible ink) and partly in a liquid crystal or thermochromic ink such that prior to subjecting the document to predetermined conditions the liquid crystal or thermochromic ink is invisible (i. e. clear or transparent) and the information is unreadable and on subjecting the document to predetermined conditions the liquid crystal or thermochromic ink becomes visible and the information becomes clear.
Depending on the application, the change in appearance of the liquid crystal or thermochromic ink may or may not be reversible on changes in, or removal of, the predetermined conditions.
The document or article may have additional permanent markings for camouflaging the permanently visible unreadable part of the information.
From a second aspect, the present invention provides a security article, such as a document, bearing information partly in permanent visible form and partly in a liquid crystal or thermochromic ink such that prior to subjecting the document to predetermined conditions, the liquid crystal ink is visible and provides invalid information, the permanently visible information providing valid information and on subjecting the document to the predetermined conditions the liquid crystal or thermochromic ink becomes invisible so as to leave only the valid information visible.
The valid and invalid information may at least partially overlap each other.
The predetermined conditions may comprise heating the document, cooling it or exposing it to light of a predetermined wavelength range such as ultraviolet light.
The article or document may be printed with a plurality of different liquid crystal or thermochromic inks each changing visibility under different predetermined conditions.
The document or article may comprise a two part substrate, a first substrate part being at least partially transparent and intended to be aligned over or under a second substrate part, the information being divided between the two parts.
An opaque covering layer may be attached over at least one information-bearing part of the article as an additional security measure.
The article may comprise a container for food or drink, which may be transparent, and the information may have a promotional nature.
From a third aspect, the present invention provides a security document comprising an adhesive label printed with a liquid crystal or thermochromic ink, the ink changing in visibility under predetermined conditions.
The label may be used for verifying the authenticity of an article such as a video tape, event ticket, package of drugs or the like. The ink is preferably invisible under normal conditions and becomes visible under the predetermined conditions, such as an elevated temperature, in order to reveal information identifying the article as acceptable.
In order to make copying difficult, different labels can be manufactured having different characteristics, such as the nature of the predetermined conditions (e. g. the temperature (s) at which the ink becomes visible), the colour of the ink when visible and the shape and intricacy of the information revealed.
Alternatively, the label may be intended to be applied to a product, e. g. a food product or the packaging of a food product, as a warning device, the ink changing in visibility at a predetermined temperature above which storage of the product is unsafe. A warning message or symbol would thus be revealed to alert retailers or customers that imperfect storage or transit conditions have occurred.
The labels are preferably produced by gravure, letterpress or flexographic printing, which methods are particularly suitable for low cost, high volume products such as meat, dairy produce, milk, chocolate and the like. However, other methods, such as screen printing or litho can also be used.
The invention will now be described in more detail and by way of example only with reference to the accompanying drawings, in which:
Figures la and lb show a substrate according to a first embodiment of the invention ;
Figures 2a and 2b show a substrate according to a second embodiment of the invention;
Figures 3a to 3c show a substrate according to a third embodiment of the invention ; and
Figures 4 and 5 show substrates according to fourth and fifth embodiments, respectively.
Figure 1 a shows a label or voucher comprising a substrate which is typically a paper, board or thin plastic carrier or base, provided with a permanent display, e. g. a conventional printing ink, which comprises a part only of the final information. This part information is not in itself meaningful or representative of any alphanumeric or other symbol or pictorial representation but contains only randomly selected parts of one or more such symbols, printed as small dots or other small shapes or marks. In addition, around these incomplete parts are printed many similar small shapes for the purposes of'camouflaging'the originally visible parts of the final information.
A microencapsulated thermochromic liquid crystal ink which is initially, and in its normal operating condition, colourless and invisible is used to print on to the substrate the remaining small parts of the final information and, in this example, further small marks not forming part thereof.
The effect of reducing the temperature of the item is to change the state of the thermochromic ink so that below its clearing point the ink becomes visible by acquiring colour.
The temperature at which this change occurs can be predetermined so that the thermochromic ink becomes visible below 15 C for example.
Although the thermochromic ink does not in itself comprise the whole of the symbol or information to be read, once visible, its juxtaposition with the permanent ink markings visibly creates the entire information, as shown in Figure lb.
Figure 2a shows a substrate in the form of a ticket or card showing a number of possible result symbols VIZ."WIN 1","WIN 10","LOSE"and"WIN 1000". Unknown to the recipient of the ticket, only one of the results is valid and is printed in permanent ink, the remaining results being invalid and printed in one or more thermochromic inks so as to confuse the eye by camouflaging the permanent ink result symbol.
On being warmed, for example by rubbing or by the touch of a hand or hot item the temperature of the substrate is elevated above the clearing points of the thermochromic inks, which become colourless. After warming, only the valid result printed in permanent ink is left. In this example, Figure 2B shows the card after warming indicating the valid result:"WIN 1".
In both of the embodiments of the invention described above, different thermochromic inks, for example displaying different colours, can be used for different display areas.
The thermochromic inks could also have different clearing temperatures, which in the first embodiment causes the necessary information to appear in stages and in the second embodiment cause the invalid results to disappear one by one. The change in visibility of the thermochromic ink can be permanent or temporary.
Figures 3a to 3c show a third embodiment of the invention which comprises a two-part substrate. A first part 1 of the substrate is a printed surface of a container 2, e. g. a wall of the container or a label applied thereto. The first substrate part 1 is printed with permanent ink 3 forming part of a message, for example in the same manner as is shown in Figure la.
A second substrate part 4 shown in Figure 3b is provided as a separate sheet of clear pvc, or the like bearing the remainder of the message but printed in a thermochromic ink which is initially colourless at normal operating temperatures. As shown in Figure 3c, the second substrate part 4, is aligned over the first part 1 and when the combined substrate is cooled, for example by placing the container in a refrigerator or by adding ice or a cold drink, the thermochromic ink acquires colour and visibility and the entire message or symbol is revealed. Without both halves, the message is incomplete.
If an alternative thermochromic ink is used which is visible at room temperature but clears at higher temperature, the message, symbol or information on the container could be revealed in a manner similar to that shown in Figures 2a and 2b, for example by placing a hot drink or hot food in the container.
Alternatively, either or both parts of the substrate could be comprised in wrappers or other packaging components. The substrate parts could of course be interchanged, the first part bearing the thermochromic ink and the second part the permanent ink. The second part can be placed under, rather than over, the first part if the first part is transparent.
Figures 4 and 5 show further alternative substrates having additional security measures. Figure 4 shows a substrate similar to those shown in Figures la and 2a but folded in half and secured at the edges in the manner of an envelope with the visible part of the information and the thermochromic ink printed inside.
Figure 5 shows a substrate having a covering layer 5 laminated or adhered to the printed surface. A portion 6 of the covering layer is perforated so that it can be torn away to reveal the substrate. Thus additional security is provided until the time of use. The perforations in the covering layer are not essential if this layer is capable of removal by peeling or a similar method.
It will be appreciated that the invention is applicable tc many different kinds of documents such as promotiona : vouchers and coupons, lottery tickets and product labels
Furthermore different types of liquid crystal, hydrochromi < or thermochromic inks may be employed which change thei visual appearance when subjected to changed conditions, e. g, temperature changes, or when subjected to electromagnetic radiation of a specific wavelength, e. g. ultra-violet radiation, or exposed to moisture.
Claims (17)
1. A security article, such as a document, bearing information partly in permanently visible form and partly in a liquid crystal or thermochromic ink such that prior to subjecting the document to predetermined conditions the liquid crystal or thermochromic ink is invisible and the information is unreadable and on subjecting the document to predetermined conditions the liquid crystal or thermochromic ink becomes visible and the information becomes clear.
2. A security article according to claim 1, wherein the change in appearance of the liquid crystal or thermochromic ink may or may not be reversible on changes in, or removal of, the predetermined conditions.
3. A security article according to claim 1 or 2, having additional permanent markings for camouflaging the permanently visible unreadable part of the information.
4. A security article, such as a document, bearing information partly in permanent visible form and partly in a liquid crystal or thermochromic ink such that prior to subjecting the document to predetermined conditions, the liquid crystal ink is visible and provides invalid information, the permanently visible information providing valid information and on subjecting the document to the predetermined conditions the liquid crystal or thermochromic ink becomes invisible so as to leave only the valid information visible.
5. A security article according to claim 4, wherein the valid and invalid information at least partially overlap each other.
6. A security-article according to any preceding claim, comprising a two part substrate, a first substrate part being at least partially transparent and intended to be aligned over or under a second substrate part, the information being divided between the two parts.
7. A security article according to any preceding claim, wherein an opaque covering layer is attached over at least one information-bearing part of the article as an additional security measure.
8. A security article according to any preceding claim, comprising a container for food or drink.
9. A security article according to claim 8, wherein the container is transparent.
10. A security document comprising an adhesive label printed with a liquid crystal or thermochromic ink, the ink changing in visibility under predetermined conditions.
11. A security document according to claim 10, wherein the ink is invisible under normal conditions and becomes visible under the predetermined conditions, in order to reveal information identifying an article as acceptable.
12. A security document according to claim 10 or 11, wherein the label is produced by gravure, letterpress or flexographic printing.
13. A security document according to claim 10,11 or 12, wherein the label is intended to be applied to a product as a warning device, the ink changing in visibility at a predetermined temperature above which storage of the product is unsafe.
14. A security article or document according to any one of claims 1 to 12, wherein the predetermined conditions comprise heating or cooling.
15. A security article or document according to any one of claims 1 to 12, wherein the predetermined conditions comprise exposure to light of a predetermined wavelength range.
16. A security article or document according to any preceding claim, printed with a plurality of different liquid crystal or thermochromic inks each changing visibility under different predetermined conditions.
17. A security article or document, substantially as described herein with respect to any one of Figures 1 to 5 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9826409.6A GB9826409D0 (en) | 1998-12-02 | 1998-12-02 | Security articles |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9928557D0 GB9928557D0 (en) | 2000-02-02 |
| GB2345879A true GB2345879A (en) | 2000-07-26 |
| GB2345879B GB2345879B (en) | 2003-03-05 |
Family
ID=10843461
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9826409.6A Ceased GB9826409D0 (en) | 1998-12-02 | 1998-12-02 | Security articles |
| GB9928557A Expired - Fee Related GB2345879B (en) | 1998-12-02 | 1999-12-02 | Security articles |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9826409.6A Ceased GB9826409D0 (en) | 1998-12-02 | 1998-12-02 | Security articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9826409D0 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002086609A1 (en) * | 2001-04-24 | 2002-10-31 | Merck Patent Gmbh | Liquid crystal device exhibiting optical properties which are changeable after assembly |
| WO2002085642A3 (en) * | 2001-04-24 | 2003-05-01 | Merck Patent Gmbh | Birefringent marking |
| WO2005055237A1 (en) * | 2003-11-26 | 2005-06-16 | General Electric Company | Authenticating articles; method, articles and polymers |
| US7094364B2 (en) | 2003-11-26 | 2006-08-22 | General Electric Company | Method of authenticating polymers, authenticatable polymers, methods of making authenticatable polymers and authenticatable articles, and articles made there from |
| US7169615B2 (en) | 2003-11-26 | 2007-01-30 | General Electric Company | Method of authenticating polymers, authenticatable polymers, methods of making authenticatable polymers and authenticatable articles, and articles made there from |
| WO2007021294A1 (en) * | 2005-08-12 | 2007-02-22 | Vitale Rodney P | An apparatus and method of using thermochromic and photochromic indicators |
| WO2016128594A1 (en) * | 2015-02-12 | 2016-08-18 | Jesus Merino Ciudad | Smart container for food and fluids |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2188283A (en) * | 1986-03-21 | 1987-09-30 | Advertising And Marketing Asso | Prize-generating printed substrates |
| DE3836424A1 (en) * | 1988-01-19 | 1989-07-27 | Horst Merz | Special label or imprint on baby bottles for the determination of the ideal drinking temperature by means of reversible hue change |
| US4859360A (en) * | 1983-10-27 | 1989-08-22 | Biosynergy, Inc. | Cholesteric liquid crystal formulations and time/temperature monitoring means |
| GB2272861A (en) * | 1992-11-28 | 1994-06-01 | Univ Cardiff | Apparatus for reading security documents bearing photochromic or thermochromic prints. |
| US5403039A (en) * | 1992-02-28 | 1995-04-04 | Babn Technologies, Inc. | Tamper-resistant article and method of authenticating the same |
| EP0837011A1 (en) * | 1996-08-15 | 1998-04-22 | Unilever Plc | Container with thermochromic temperature indicator |
| GB2318323A (en) * | 1995-06-21 | 1998-04-22 | Timothy James Cameron Fraser | Temperature-sensitive product bearing a representation |
| US5786578A (en) * | 1997-06-30 | 1998-07-28 | Christy; George M. | Microwave-heatable exercise putty in a container with temperature indicator |
| US5826915A (en) * | 1995-02-17 | 1998-10-27 | Wallace Computer Services, Inc. | Method of using thermochromic material on security documents and product |
| EP0967084A1 (en) * | 1998-06-24 | 1999-12-29 | I.P.S. S.r.l. International Products & Services | Continuous or discrete sheet printing process for liquid crystals, thermochromic and/or photochromic materials |
-
1998
- 1998-12-02 GB GBGB9826409.6A patent/GB9826409D0/en not_active Ceased
-
1999
- 1999-12-02 GB GB9928557A patent/GB2345879B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4859360A (en) * | 1983-10-27 | 1989-08-22 | Biosynergy, Inc. | Cholesteric liquid crystal formulations and time/temperature monitoring means |
| GB2188283A (en) * | 1986-03-21 | 1987-09-30 | Advertising And Marketing Asso | Prize-generating printed substrates |
| DE3836424A1 (en) * | 1988-01-19 | 1989-07-27 | Horst Merz | Special label or imprint on baby bottles for the determination of the ideal drinking temperature by means of reversible hue change |
| US5403039A (en) * | 1992-02-28 | 1995-04-04 | Babn Technologies, Inc. | Tamper-resistant article and method of authenticating the same |
| GB2272861A (en) * | 1992-11-28 | 1994-06-01 | Univ Cardiff | Apparatus for reading security documents bearing photochromic or thermochromic prints. |
| US5826915A (en) * | 1995-02-17 | 1998-10-27 | Wallace Computer Services, Inc. | Method of using thermochromic material on security documents and product |
| GB2318323A (en) * | 1995-06-21 | 1998-04-22 | Timothy James Cameron Fraser | Temperature-sensitive product bearing a representation |
| EP0837011A1 (en) * | 1996-08-15 | 1998-04-22 | Unilever Plc | Container with thermochromic temperature indicator |
| US5786578A (en) * | 1997-06-30 | 1998-07-28 | Christy; George M. | Microwave-heatable exercise putty in a container with temperature indicator |
| EP0967084A1 (en) * | 1998-06-24 | 1999-12-29 | I.P.S. S.r.l. International Products & Services | Continuous or discrete sheet printing process for liquid crystals, thermochromic and/or photochromic materials |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002086609A1 (en) * | 2001-04-24 | 2002-10-31 | Merck Patent Gmbh | Liquid crystal device exhibiting optical properties which are changeable after assembly |
| WO2002085642A3 (en) * | 2001-04-24 | 2003-05-01 | Merck Patent Gmbh | Birefringent marking |
| EP1681586A1 (en) * | 2001-04-24 | 2006-07-19 | Merck Patent GmbH | Birefringent marking |
| AU2002304051B2 (en) * | 2001-04-24 | 2007-08-16 | Merck Patent Gmbh | Birefringent Marking |
| WO2005055237A1 (en) * | 2003-11-26 | 2005-06-16 | General Electric Company | Authenticating articles; method, articles and polymers |
| US7094364B2 (en) | 2003-11-26 | 2006-08-22 | General Electric Company | Method of authenticating polymers, authenticatable polymers, methods of making authenticatable polymers and authenticatable articles, and articles made there from |
| US7169615B2 (en) | 2003-11-26 | 2007-01-30 | General Electric Company | Method of authenticating polymers, authenticatable polymers, methods of making authenticatable polymers and authenticatable articles, and articles made there from |
| WO2007021294A1 (en) * | 2005-08-12 | 2007-02-22 | Vitale Rodney P | An apparatus and method of using thermochromic and photochromic indicators |
| CN101291857B (en) * | 2005-08-12 | 2010-05-26 | 罗德尼·P·瓦伊塔尔 | Apparatus and method for using thermochromic and photochromic indicators |
| WO2016128594A1 (en) * | 2015-02-12 | 2016-08-18 | Jesus Merino Ciudad | Smart container for food and fluids |
| EP3257908A4 (en) * | 2015-02-12 | 2018-10-31 | Jesus Merino Ciudad | Smart container for food and fluids |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9928557D0 (en) | 2000-02-02 |
| GB9826409D0 (en) | 1999-01-27 |
| GB2345879B (en) | 2003-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 711B | Application made for correction of error (sect. 117/77) | ||
| 711G | Correction allowed (sect. 117/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20051202 |