CA2034000A1 - Security paper for producing documents - Google Patents
Security paper for producing documentsInfo
- Publication number
- CA2034000A1 CA2034000A1 CA 2034000 CA2034000A CA2034000A1 CA 2034000 A1 CA2034000 A1 CA 2034000A1 CA 2034000 CA2034000 CA 2034000 CA 2034000 A CA2034000 A CA 2034000A CA 2034000 A1 CA2034000 A1 CA 2034000A1
- Authority
- CA
- Canada
- Prior art keywords
- paper
- colour
- color
- security
- marking
- 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.)
- Abandoned
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000006386 neutralization reaction Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 241000357297 Atypichthys strigatus Species 0.000 description 1
- 241000566113 Branta sandvicensis Species 0.000 description 1
- 238000006873 Coates reaction Methods 0.000 description 1
- 241001658031 Eris Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- ZKURGBYDCVNWKH-UHFFFAOYSA-N [3,7-bis(dimethylamino)phenothiazin-10-yl]-phenylmethanone Chemical compound C12=CC=C(N(C)C)C=C2SC2=CC(N(C)C)=CC=C2N1C(=O)C1=CC=CC=C1 ZKURGBYDCVNWKH-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 aluminum silicates Chemical class 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- YXVFYQXJAXKLAK-UHFFFAOYSA-N biphenyl-4-ol Chemical compound C1=CC(O)=CC=C1C1=CC=CC=C1 YXVFYQXJAXKLAK-UHFFFAOYSA-N 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- QTWZICCBKBYHDM-UHFFFAOYSA-N leucomethylene blue Chemical compound C1=C(N(C)C)C=C2SC3=CC(N(C)C)=CC=C3NC2=C1 QTWZICCBKBYHDM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
- B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
- D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Color Printing (AREA)
- Paper (AREA)
Abstract
A security paper can be used to produce documents which can be identified as genuine by means of a colour reaction system consisting of a colour-forming component and a colour-developing component and based on the principle of pressure-sensitive duplicating paper. The colour-forming component is applied to the paper, which contains the colour-developing component, by means of a marking device. A number of drawbacks are associated with known security systems for documents based on the principle of pressure-sensitive duplicating paper. The aim of the invention is to overcome these drawbacks. To this end, the security paper is placed in contact with a marking liquid which contains a colour-forming component.
The reaction between the colour-developing component present in the paper and the colour-forming component occurs in the paper itself instead of on the surface as in conventional papers. The marking penetrates the paper and may even strike through on the other side, where it forms a mirror image. This marking cannot be removed from the document without destroying the document itself. A
further major advantage of the invention is that a paper with an incorporated colour-developing component is a true security paper, i.e., comparable with conventional special papers (with fluorescent inlays, small engravings, watermarks, metal threads, etc.) which are note available to the general public. This appreciably enhances the security.
The reaction between the colour-developing component present in the paper and the colour-forming component occurs in the paper itself instead of on the surface as in conventional papers. The marking penetrates the paper and may even strike through on the other side, where it forms a mirror image. This marking cannot be removed from the document without destroying the document itself. A
further major advantage of the invention is that a paper with an incorporated colour-developing component is a true security paper, i.e., comparable with conventional special papers (with fluorescent inlays, small engravings, watermarks, metal threads, etc.) which are note available to the general public. This appreciably enhances the security.
Description
F ~ 1 5: 1 ~ U D ~ ~ J ~ 1`1 5 E~ p, ~1 ~
I ~ `
~1 SecuriSy p~per for ~roducing documents It has been attempted since time immemorlal to forge paper document~ ~nd for ~ust as long efforts h~ve al~o been made to take sulta~le measures to dete¢t SUCh S forgeries. The te~n ~documents~ i3 ln thl C~SQ to be underRtood quite generally and compris~s all types o~
printed item~ and papers whlch can provide the respective owner with ~ financial or other advantage. They may cons0quently ~e certificates in th~ narLower sense, bank-10 notes, securltle8, check~ and tha like, but similarlyalso ~uthorization and identifica~ion papers, such a~ for example entrance tickets and travel ticket~ or yet other types o~ documents.
i Detecting an imitation of a document is usua~ly : 15aided by the ~riginal being provlded with certain charac-teri~tlc feature~ which can~ot be imi-tated, or only ~y ~olng to con~iderable lengths, or only imper~ectly, and which consequ~ntly maXe the origi.nal dis~lnguLshable f~om an ~nitation. ~nong these characl:eris~ic features are the u3e o~ speci~l papexs which are not accessible to every-one ~nd in whlch for ex~npl~ ~:luorescent inlays, ~m~ll engravlngs, wat~rma~s, me~al t'hread~ or other ~ature~
not contained in freely acce~3~ble papers are incor-porated~ Furthermore, however, the vi~ual design o~ the ~5 d~cument may also serve as a charact~ristic feature, by for ~xample markings, guilloti~e ho1es, complicated color coating~ or moticulously construc~d motif~ belng prin~ed onto the pape~ o~ other/ iml~atlon~hlndering printLng technique~ b0inq used. All ~uch cha~ac~erlstlc feature~
30 have proved emlnently successful in many fLeld~, in pa~ticular 1~, aa i~ frèquently the Ca~e, ~ore than one are provided eogether, that ~8 to say for ox~ple the paper c~n~alns watexmaxks and fluorc~cent lnl~y~ and at t~o ~amo timo i~ prin~d in ~ way which innib~ta lmlt-3S ation.
~ hese types o~ ~hara~terization of document~ h~v~~rawback~. Por ~n3tanca, feature~ incorporated in the paper cannot normally be detected Lmmedia~ely by slmple ~.
F F~. t 1 r3 1 ~~ I.. J Cl L ~ t`~ ~; E_ h; ~ P . ~a 5 f ;203~000 viewing, but requlre ~peciflc tes~in~, for ex~nple with UV light (fluorescen~ inlay~ or small engraving5) or with speclal test methods (metal threads) or ~t least by vlewin~ against the ll~ht ~watennarx~). But the vL~u~l de~ign of a doct~ent i3 also not alway~ suitable for the immediate identification of ~n imltation. Since original and imitation are only very rarely encountered alDng~ide oach other, ~he detection o~ deviation3 in tha vi~ual design is only po~siblo with great experience, which with the Lncreas1ng complexity of the prints 1s only available to ~n expert.
These drawbac~s have an effect ln particula~ in the case of '`masg documQnts~. Such doc~ment~ are sub-mit~ed to an inspector in a gr~at num~er within a short lS time, with the conse~uence that the inspector has no poss1b1lity ~t all of doing anything other than lnspect-ina the doct~ent by s~m~le viewin~, usually not even very closely. Typical exa~pl~s of such mas~ document~ ar~
travel tickets~ entrance tlC~et'l and ~uchlike items provi~g entitlement, for which furthermore th~ ~tandard o~ an imitatlon_inhibltir~ characterlzation is g~nerally no~ ~o hi~h ag, ~o~ example, ln t.he case o~ bankn4te~, ~or re~ons o~ co~
A further drawback ~ that poten-~ial ~orgers can 2$ detect wlth relat~vely llt~le prob:Lem whlch features they have to imita~ in order to make ~he respec~lve docu~ent appea~ as preswmably genuine.
In EP-~ 90 13~ a method i8 d~ cribed by whlch tha drawback~ mentloned are to be overcome. This method of che~Xing the genuinene~ of documents worXs on the prln-ciple of color~eaction ~yatems, whlch are known f~om pressure-s~n~itLve copy~ng papsr~ ~carbonless copying paper o~ ~CR papar) snd which compri~e a color former, emi~ting olectron~, and a color dev~lope~, xecei~ln~
~5 ~le~rons. ~xample~ which are u~ed as colo~ deYelop~r are clsy~, at~apulgite, zeolite, bentonl~e and kaolln o~
el9~ phenol re~in3, and examples 3ervin~ ~s color ~orm~r~
ar~ c~tion~c dyes in t~e~r colorless ~or very w~akly colored) leuco form, ~or example crystal-vlolet lacton~
~ 1 F f~: ~ L ~ ~ U 1) L~ -- := W ~~ i E ~ ~ P ~
I ~ `
~1 SecuriSy p~per for ~roducing documents It has been attempted since time immemorlal to forge paper document~ ~nd for ~ust as long efforts h~ve al~o been made to take sulta~le measures to dete¢t SUCh S forgeries. The te~n ~documents~ i3 ln thl C~SQ to be underRtood quite generally and compris~s all types o~
printed item~ and papers whlch can provide the respective owner with ~ financial or other advantage. They may cons0quently ~e certificates in th~ narLower sense, bank-10 notes, securltle8, check~ and tha like, but similarlyalso ~uthorization and identifica~ion papers, such a~ for example entrance tickets and travel ticket~ or yet other types o~ documents.
i Detecting an imitation of a document is usua~ly : 15aided by the ~riginal being provlded with certain charac-teri~tlc feature~ which can~ot be imi-tated, or only ~y ~olng to con~iderable lengths, or only imper~ectly, and which consequ~ntly maXe the origi.nal dis~lnguLshable f~om an ~nitation. ~nong these characl:eris~ic features are the u3e o~ speci~l papexs which are not accessible to every-one ~nd in whlch for ex~npl~ ~:luorescent inlays, ~m~ll engravlngs, wat~rma~s, me~al t'hread~ or other ~ature~
not contained in freely acce~3~ble papers are incor-porated~ Furthermore, however, the vi~ual design o~ the ~5 d~cument may also serve as a charact~ristic feature, by for ~xample markings, guilloti~e ho1es, complicated color coating~ or moticulously construc~d motif~ belng prin~ed onto the pape~ o~ other/ iml~atlon~hlndering printLng technique~ b0inq used. All ~uch cha~ac~erlstlc feature~
30 have proved emlnently successful in many fLeld~, in pa~ticular 1~, aa i~ frèquently the Ca~e, ~ore than one are provided eogether, that ~8 to say for ox~ple the paper c~n~alns watexmaxks and fluorc~cent lnl~y~ and at t~o ~amo timo i~ prin~d in ~ way which innib~ta lmlt-3S ation.
~ hese types o~ ~hara~terization of document~ h~v~~rawback~. Por ~n3tanca, feature~ incorporated in the paper cannot normally be detected Lmmedia~ely by slmple ~.
F F~. t 1 r3 1 ~~ I.. J Cl L ~ t`~ ~; E_ h; ~ P . ~a 5 f ;203~000 viewing, but requlre ~peciflc tes~in~, for ex~nple with UV light (fluorescen~ inlay~ or small engraving5) or with speclal test methods (metal threads) or ~t least by vlewin~ against the ll~ht ~watennarx~). But the vL~u~l de~ign of a doct~ent i3 also not alway~ suitable for the immediate identification of ~n imltation. Since original and imitation are only very rarely encountered alDng~ide oach other, ~he detection o~ deviation3 in tha vi~ual design is only po~siblo with great experience, which with the Lncreas1ng complexity of the prints 1s only available to ~n expert.
These drawbac~s have an effect ln particula~ in the case of '`masg documQnts~. Such doc~ment~ are sub-mit~ed to an inspector in a gr~at num~er within a short lS time, with the conse~uence that the inspector has no poss1b1lity ~t all of doing anything other than lnspect-ina the doct~ent by s~m~le viewin~, usually not even very closely. Typical exa~pl~s of such mas~ document~ ar~
travel tickets~ entrance tlC~et'l and ~uchlike items provi~g entitlement, for which furthermore th~ ~tandard o~ an imitatlon_inhibltir~ characterlzation is g~nerally no~ ~o hi~h ag, ~o~ example, ln t.he case o~ bankn4te~, ~or re~ons o~ co~
A further drawback ~ that poten-~ial ~orgers can 2$ detect wlth relat~vely llt~le prob:Lem whlch features they have to imita~ in order to make ~he respec~lve docu~ent appea~ as preswmably genuine.
In EP-~ 90 13~ a method i8 d~ cribed by whlch tha drawback~ mentloned are to be overcome. This method of che~Xing the genuinene~ of documents worXs on the prln-ciple of color~eaction ~yatems, whlch are known f~om pressure-s~n~itLve copy~ng papsr~ ~carbonless copying paper o~ ~CR papar) snd which compri~e a color former, emi~ting olectron~, and a color dev~lope~, xecei~ln~
~5 ~le~rons. ~xample~ which are u~ed as colo~ deYelop~r are clsy~, at~apulgite, zeolite, bentonl~e and kaolln o~
el9~ phenol re~in3, and examples 3ervin~ ~s color ~orm~r~
ar~ c~tion~c dyes in t~e~r colorless ~or very w~akly colored) leuco form, ~or example crystal-vlolet lacton~
~ 1 F f~: ~ L ~ ~ U 1) L~ -- := W ~~ i E ~ ~ P ~
3- ~03(~)00 or benzoylleucomethylene blue.
One of the two components, preferably the color developer of the color-reaction ~ystem, i~ applied in a coating to at lea3t part of the sur~ace of -the document to be secured again~t forgery. The other component, that iY to say preferably the color former, i~ contain~d in a colored ~arklng liquid, which for checking purpose3 is 8pplied t~ the document to be tested. In the ca~e o genuine documents, there occurs between the componenta of 10~.h~ colo~ ~cQction oyo~om .3 color roD.ctlc.n, wh~h ~ S
a color e~fect deviating ~rom the orLginal color of the m~klr~ l t~ ~r.~r. Tn the case o~ nnq~nuine document~, on the other hand, the mar~lng ~ppear~ in the original color of ~h~ marking liquld.
15This solution ~ccordln~ to EP-A 90 130 h~s the advantage that the corre~pondin~ docum~nt~ can ~e tqsted incon~plcuously for genuineness with little ou~lay on a$d~, which are mobile.
~owe~er, ~long with th~se ~dvantag~s, draw4ack~
stlll remaln. For lnstance, ~orçlar~ can chang~ ~ 3ecurity document subse~uently by removlng the coating in whlch th~ one component of ~ho calor-r~action sy~tam wa~
applied to the pape~ and maXing the r~qulr~d change ln the reactlon color which appear,s on the documant. To be regardad a~ a further drawback is that Lt i8 relatlv~ly simple for a skilled forger w1th knowledge of the under-lyin~ react~on pr~nclple to lml~ate th~ securlty paper, that is to say ~or ex~mple to coat a ~heet o~ ca~d with a colo~ de~elope~ or obtain a ~orre~ponding card intended for other purpose3, and alr~ady coate~, and use lt, or example w~tn ~ne a~a Ol a ~ r ~l~U~V~ L ~ ~V
travel ticke~s ~or example, This i~ where th~ invention comes in. Its ob~ect is to overcome these remaining drawb~cks of the prlor 3S a~t.
According to the invention, th~3 ob~ec~ i3 achleved ~y the ~act tha~ the color developer is evenly dist~ibuted in the paper. ~his i~ accomplished by the color develope~ being added to ~he pulp ~ven ~efore web -_ 4 _ 2 ~ 3 formation, in othe~ words i~ l~ incorporated in th~
paper.
The following are xeg~rded as color developer~
for the purpose3 of the ~ nventlon~
- activated grades of clay, such as for exampla sllt clay, bentonite, attapulgite or 3ynthetic products, such as treated ~nhydrides, aluminum silicates, magnesl~m ~illcate~
- specific zinc ~alicylate compounds - phenolic resin~, such aq for example condensation product-q of paraphenylphenol, pa~a-alkyl-phenols wlth formaldehyde.
If the security pa~er according to th~ i~vent~on is brought into contact with a marXing liquid whlch containq a color former, the reactlon betwean the color developer pre~ent in th~ paper and the color ~ormer no longer ta~es place on the surface, AS usual hitherto, ~ut in the paper ~tsel~. Th~ m~rking penetrate~ the pAper and may even strike through onko the other sLdc o~ tho paper, i.e. ~t form~ a mirror image th~re. It is now no longer possi~Le to ~emove such a marklng from the document characteri~ed in thi~ way wl~hou~ destr~yin~ the sa~d aocume~n~ ~v~ o.llr how~ ~h4 oc~a~rlty lc~ ~u~atar~_ tLally enhanced by ~he fact tha~ a paper w~th int~gratad color developer i~ a tru~ ~ecurlty paper, that i~ to ~ay i8 comparable with the special papers m~ntioned at the b~ginning ~w~t~ for exampl~ fluore~cent inlay6, ~mall on~ra~nqs, watermarks, metal threads an~ the liXe3 which ara not accessible to eve~yone. It 18 to be regarded a~
a furth~r advantage that tho ma~klng can be mado wlth tha same ~UCC~8~ on both s~des of the paper. Pr~viou~ly, the paper had to be coated on both sid~s for thi~.
All leuco base~ known from tha t~chn~que of NCR
pape~s can be employed a~ color form~r~ for the purpo3e~
`~ 35 of th~ inventio~, either ~in~ puro 6u~8tanca8 or, ~8 a ~: rule, ~ub8tance mixture~ h whlch, ~ generally ~ usual, d~ reaction color~ can b~ a~us~ed~ The : orig~nal celor of tha ma~kin~ liquid i8 ln thiu case ~hos~n such t~t i~ di~far~ a~ di6t~nctly a~ po~sible .
, .
.
F 8~ l U 1- L -- -; W ~ ; E ~ p _ ~
~/
S zo.~ n from the color p~oduced by th~ color r~actlon ~nd can I superLmposed by another color.
I Incldent~lly, it i~ also conceivable to provid~
the marking liquid with ~ust th~ color former a~ the only . 5 coloring agent. Such a to a certain ex~ent "ln~sible"
mArk;n,J ~ lor, wh1~h ~nly hf?~t~m~R vi,~:ihl~ ~ n ;3n or~ n~l ¦ document, is less expedient, how~Yer, becau~ the non-appearance of a mark~ng on ~n imit~tion ~an al30 c~u~e the insp~c~or to draw the wrong conclusion that the ¦ 10 marking device failed. In addition, in numerous ~pplic~-! . tion~, for example ~n the ca6e of railway tickets in ~
supranat~onal tran~port network, documents which are ; valid but origindtc from foralgn i~suer~ and are not o~
the ~ecurity standard xeached according to the invention h~ve to be able to be checked and cance~led.
In a further develo4ment of the invention~ part3 o~ the surace of ths securl~y paper may be coa-ted on o~e or both ~ides with a neutrallzatlon lnk. In the thu~
ne~tralized area~ no color reactlon tak~ place durlng the marking, so that the original color o the markln~
uid appear~ In the non-neutraliz~d areas of the pap~r, on the other hand, the colo~ re~ction b~tws~n color former and color dcveloper occurs~ and the suporim-posLn~ color AppeAra. This pern1lt~ an lmmedlate com-parison o~ the orLglnal color wit~ the superimpo~ing color and conseguently a particularly guick and reliable c~eck ~en by per~ons who are color-blind.
A further po~si~ility of ~olor differentidt1on i8 pro~ided by th~ u~e o~ a multi-part stamp pad, on which ~u at least one part oontalns the marXing liquid ~ithout color f~rmer and a~ lea~t one o~h~r part of the atamp ~ad , contain~ the marking liquid with color former. ~urlng ! marklng of the doeument, a color reaction t~Xes place in ¦ the area with the color former, while no ~olor rea~tion oc~ rs ~n t h~ ArRi~ ~r~f~ frnm nnl nr fnrm~r ~n th;~l h~rf-~he ori~inal color of the markin~ liquLd bacom~ Yl~lble.
` ~he paper is al~o ~xpqdlently provl~d wl~
further charac~rizin~ features of gen~ineness know~ per e~ ~U~ WaLt~Ll~ Lh~ ~ UUl~ y~ ~l~
I
"-¦ - 6 ~ ~
whLch can be used selectively for a more ~horough test of genu~nene~s if the color reaction ha~ given cause to suspect ~he existenc~ of an imitation. It ha~ heen ~ound as quite particul~rly suxpr~in~ here that watermarks r ~n~ e; ~er~bl~ more distinctly in ~he case o f the paper according to the invention than otherwise.
The followi~ axemplary embodiment is intended to illu~trate the lnvention more ~pecifically, wlthout rQstricting it to this embodlment.
¦ 10 A phenothia2ine leuco basQ t~Pergascrlpt Blau ! S-4G") i~ dissolved as color former ln a commerc~lly I a~allable, for example ~reen or red, itamp ink. A wate~-I mark paper which contain~ ac~i~ated attapulglte as color ~; developer is prepared a~ the paper. If this p.~par ls then prlnted with the ~tamp ink containin~ ~he color former, a somewhat dark-brown appearlng stamp imprint i9 0~-talne~. On a normal pape.~, on the other hand, a ~amp imprint produced in the s~ne way - wlthout reactant ~os the color former - has its orlginal green or red color unchanged, automaticall~ cla~sifying thi~s paper a8 "ungenuine~ o~ at leas~ a~ ~possibly ungenuine", wlth ~he con9equence that a ~pecific in~spection ~or the preaenCe o~ the watermar~ a8 a ~urther ~eature of ~enuinene~ ig ll~lblc~Lo~l, ~ho ~~ ~ lo ~ r dopo~do~ ~e ~-hG ~-hc~r ~n~ h~W
as the watermark papor and the uncoat~d normal pape~ are prlnt~d.
.
One of the two components, preferably the color developer of the color-reaction ~ystem, i~ applied in a coating to at lea3t part of the sur~ace of -the document to be secured again~t forgery. The other component, that iY to say preferably the color former, i~ contain~d in a colored ~arklng liquid, which for checking purpose3 is 8pplied t~ the document to be tested. In the ca~e o genuine documents, there occurs between the componenta of 10~.h~ colo~ ~cQction oyo~om .3 color roD.ctlc.n, wh~h ~ S
a color e~fect deviating ~rom the orLginal color of the m~klr~ l t~ ~r.~r. Tn the case o~ nnq~nuine document~, on the other hand, the mar~lng ~ppear~ in the original color of ~h~ marking liquld.
15This solution ~ccordln~ to EP-A 90 130 h~s the advantage that the corre~pondin~ docum~nt~ can ~e tqsted incon~plcuously for genuineness with little ou~lay on a$d~, which are mobile.
~owe~er, ~long with th~se ~dvantag~s, draw4ack~
stlll remaln. For lnstance, ~orçlar~ can chang~ ~ 3ecurity document subse~uently by removlng the coating in whlch th~ one component of ~ho calor-r~action sy~tam wa~
applied to the pape~ and maXing the r~qulr~d change ln the reactlon color which appear,s on the documant. To be regardad a~ a further drawback is that Lt i8 relatlv~ly simple for a skilled forger w1th knowledge of the under-lyin~ react~on pr~nclple to lml~ate th~ securlty paper, that is to say ~or ex~mple to coat a ~heet o~ ca~d with a colo~ de~elope~ or obtain a ~orre~ponding card intended for other purpose3, and alr~ady coate~, and use lt, or example w~tn ~ne a~a Ol a ~ r ~l~U~V~ L ~ ~V
travel ticke~s ~or example, This i~ where th~ invention comes in. Its ob~ect is to overcome these remaining drawb~cks of the prlor 3S a~t.
According to the invention, th~3 ob~ec~ i3 achleved ~y the ~act tha~ the color developer is evenly dist~ibuted in the paper. ~his i~ accomplished by the color develope~ being added to ~he pulp ~ven ~efore web -_ 4 _ 2 ~ 3 formation, in othe~ words i~ l~ incorporated in th~
paper.
The following are xeg~rded as color developer~
for the purpose3 of the ~ nventlon~
- activated grades of clay, such as for exampla sllt clay, bentonite, attapulgite or 3ynthetic products, such as treated ~nhydrides, aluminum silicates, magnesl~m ~illcate~
- specific zinc ~alicylate compounds - phenolic resin~, such aq for example condensation product-q of paraphenylphenol, pa~a-alkyl-phenols wlth formaldehyde.
If the security pa~er according to th~ i~vent~on is brought into contact with a marXing liquid whlch containq a color former, the reactlon betwean the color developer pre~ent in th~ paper and the color ~ormer no longer ta~es place on the surface, AS usual hitherto, ~ut in the paper ~tsel~. Th~ m~rking penetrate~ the pAper and may even strike through onko the other sLdc o~ tho paper, i.e. ~t form~ a mirror image th~re. It is now no longer possi~Le to ~emove such a marklng from the document characteri~ed in thi~ way wl~hou~ destr~yin~ the sa~d aocume~n~ ~v~ o.llr how~ ~h4 oc~a~rlty lc~ ~u~atar~_ tLally enhanced by ~he fact tha~ a paper w~th int~gratad color developer i~ a tru~ ~ecurlty paper, that i~ to ~ay i8 comparable with the special papers m~ntioned at the b~ginning ~w~t~ for exampl~ fluore~cent inlay6, ~mall on~ra~nqs, watermarks, metal threads an~ the liXe3 which ara not accessible to eve~yone. It 18 to be regarded a~
a furth~r advantage that tho ma~klng can be mado wlth tha same ~UCC~8~ on both s~des of the paper. Pr~viou~ly, the paper had to be coated on both sid~s for thi~.
All leuco base~ known from tha t~chn~que of NCR
pape~s can be employed a~ color form~r~ for the purpo3e~
`~ 35 of th~ inventio~, either ~in~ puro 6u~8tanca8 or, ~8 a ~: rule, ~ub8tance mixture~ h whlch, ~ generally ~ usual, d~ reaction color~ can b~ a~us~ed~ The : orig~nal celor of tha ma~kin~ liquid i8 ln thiu case ~hos~n such t~t i~ di~far~ a~ di6t~nctly a~ po~sible .
, .
.
F 8~ l U 1- L -- -; W ~ ; E ~ p _ ~
~/
S zo.~ n from the color p~oduced by th~ color r~actlon ~nd can I superLmposed by another color.
I Incldent~lly, it i~ also conceivable to provid~
the marking liquid with ~ust th~ color former a~ the only . 5 coloring agent. Such a to a certain ex~ent "ln~sible"
mArk;n,J ~ lor, wh1~h ~nly hf?~t~m~R vi,~:ihl~ ~ n ;3n or~ n~l ¦ document, is less expedient, how~Yer, becau~ the non-appearance of a mark~ng on ~n imit~tion ~an al30 c~u~e the insp~c~or to draw the wrong conclusion that the ¦ 10 marking device failed. In addition, in numerous ~pplic~-! . tion~, for example ~n the ca6e of railway tickets in ~
supranat~onal tran~port network, documents which are ; valid but origindtc from foralgn i~suer~ and are not o~
the ~ecurity standard xeached according to the invention h~ve to be able to be checked and cance~led.
In a further develo4ment of the invention~ part3 o~ the surace of ths securl~y paper may be coa-ted on o~e or both ~ides with a neutrallzatlon lnk. In the thu~
ne~tralized area~ no color reactlon tak~ place durlng the marking, so that the original color o the markln~
uid appear~ In the non-neutraliz~d areas of the pap~r, on the other hand, the colo~ re~ction b~tws~n color former and color dcveloper occurs~ and the suporim-posLn~ color AppeAra. This pern1lt~ an lmmedlate com-parison o~ the orLglnal color wit~ the superimpo~ing color and conseguently a particularly guick and reliable c~eck ~en by per~ons who are color-blind.
A further po~si~ility of ~olor differentidt1on i8 pro~ided by th~ u~e o~ a multi-part stamp pad, on which ~u at least one part oontalns the marXing liquid ~ithout color f~rmer and a~ lea~t one o~h~r part of the atamp ~ad , contain~ the marking liquid with color former. ~urlng ! marklng of the doeument, a color reaction t~Xes place in ¦ the area with the color former, while no ~olor rea~tion oc~ rs ~n t h~ ArRi~ ~r~f~ frnm nnl nr fnrm~r ~n th;~l h~rf-~he ori~inal color of the markin~ liquLd bacom~ Yl~lble.
` ~he paper is al~o ~xpqdlently provl~d wl~
further charac~rizin~ features of gen~ineness know~ per e~ ~U~ WaLt~Ll~ Lh~ ~ UUl~ y~ ~l~
I
"-¦ - 6 ~ ~
whLch can be used selectively for a more ~horough test of genu~nene~s if the color reaction ha~ given cause to suspect ~he existenc~ of an imitation. It ha~ heen ~ound as quite particul~rly suxpr~in~ here that watermarks r ~n~ e; ~er~bl~ more distinctly in ~he case o f the paper according to the invention than otherwise.
The followi~ axemplary embodiment is intended to illu~trate the lnvention more ~pecifically, wlthout rQstricting it to this embodlment.
¦ 10 A phenothia2ine leuco basQ t~Pergascrlpt Blau ! S-4G") i~ dissolved as color former ln a commerc~lly I a~allable, for example ~reen or red, itamp ink. A wate~-I mark paper which contain~ ac~i~ated attapulglte as color ~; developer is prepared a~ the paper. If this p.~par ls then prlnted with the ~tamp ink containin~ ~he color former, a somewhat dark-brown appearlng stamp imprint i9 0~-talne~. On a normal pape.~, on the other hand, a ~amp imprint produced in the s~ne way - wlthout reactant ~os the color former - has its orlginal green or red color unchanged, automaticall~ cla~sifying thi~s paper a8 "ungenuine~ o~ at leas~ a~ ~possibly ungenuine", wlth ~he con9equence that a ~pecific in~spection ~or the preaenCe o~ the watermar~ a8 a ~urther ~eature of ~enuinene~ ig ll~lblc~Lo~l, ~ho ~~ ~ lo ~ r dopo~do~ ~e ~-hG ~-hc~r ~n~ h~W
as the watermark papor and the uncoat~d normal pape~ are prlnt~d.
.
Claims (3)
1. Security paper for producing documents which can be identified as genuine by means of a color-reaction system, consisting of color former and color developer on the principle of pressure-sensitive copying paper, for which purpose the color former is to be applied by means of a marking device to the paper provided with the color developer, characterized in that the color developer is evenly distributed in the paper.
2. Security paper according to Claim 1, charac-terized in that parts of its surface are coated on one or both sides with a neutralization ink.
3. Security paper according to one of the preceding Claims, characterized in that the paper is additionally provided with characterizing security features known per se, such as watermarks, fluorescent inlays and the like.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893918765 DE3918765A1 (en) | 1989-06-08 | 1989-06-08 | SECURITY PAPER FOR THE PRODUCTION OF DOCUMENTS |
DEP3918765.9 | 1989-06-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2034000A1 true CA2034000A1 (en) | 1990-12-09 |
Family
ID=6382378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2034000 Abandoned CA2034000A1 (en) | 1989-06-08 | 1990-06-08 | Security paper for producing documents |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0427847A1 (en) |
JP (1) | JPH04500250A (en) |
AU (1) | AU640148B2 (en) |
CA (1) | CA2034000A1 (en) |
DD (1) | DD299443A5 (en) |
DE (1) | DE3918765A1 (en) |
ES (1) | ES2020901A4 (en) |
WO (1) | WO1990015190A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19801589C2 (en) * | 1998-01-17 | 2001-02-01 | Bundesdruckerei Gmbh | Process for the tamper-proof production of value and security documents |
DE19936030A1 (en) * | 1999-07-30 | 2001-02-08 | Mitsubishi Hitec Paper Flensbu | Recording paper with a combination of several security features |
DE10001697A1 (en) * | 2000-01-18 | 2001-07-19 | Granderath Gmbh J | Authorization information sheet is provided with substance so that printed information is removed by solvent or reacts with it so reaction is made visible by appearance of color |
FR2804448B1 (en) * | 2000-02-01 | 2002-04-05 | Arjo Wiggins Sa | SECURITY PAPER COMPRISING A SECURITY ZONE, METHOD FOR PRODUCING SUCH PAPER AND DEVICE FOR CARRYING OUT SAID METHOD |
DE10020873A1 (en) * | 2000-04-28 | 2001-11-08 | Mitsubishi Hitec Paper Flensbu | Temporary authentification mark for security documents uses a substituted phthalide reacting on contact with an alkaline solution, together with a volatile solvent |
RU2260088C2 (en) * | 2003-10-01 | 2005-09-10 | Научно-исследовательский институт Гознака - Государственное предприятие | Security paper protected from falsification and method for manufacturing the paper |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2380195A (en) * | 1942-05-19 | 1945-07-10 | Todd Co Inc | Safety paper and ink therefor |
US3523866A (en) * | 1968-11-19 | 1970-08-11 | Wilbur W Krueger | Authenticatable paper |
GB1507454A (en) * | 1975-06-19 | 1978-04-12 | Wiggins Teape Ltd | Security paper |
DE2527462A1 (en) * | 1975-06-20 | 1976-12-30 | Pelikan Werke Wagner Guenther | PRE-PRINTS SECURED AGAINST FALSE |
DE3132146A1 (en) * | 1981-08-14 | 1983-03-03 | Bayer Ag, 5090 Leverkusen | COUNTERFEIT-PROOF PAPER |
DE3211102A1 (en) * | 1982-03-25 | 1983-10-06 | Schwarz Klaus Billett Automat | METHOD FOR AUTHENTICITY CONTROL OF PAPER SECTIONS AND USE OF A COLOR REACTION SYSTEM SUITABLE FOR THIS |
US4740015A (en) * | 1986-07-01 | 1988-04-26 | Moore Business Forms, Inc. | Security document and method of testing same |
-
1989
- 1989-06-08 DE DE19893918765 patent/DE3918765A1/en not_active Ceased
-
1990
- 1990-06-08 EP EP19900909040 patent/EP0427847A1/en not_active Withdrawn
- 1990-06-08 AU AU58282/90A patent/AU640148B2/en not_active Ceased
- 1990-06-08 CA CA 2034000 patent/CA2034000A1/en not_active Abandoned
- 1990-06-08 DD DD34146990A patent/DD299443A5/en unknown
- 1990-06-08 JP JP2508601A patent/JPH04500250A/en active Pending
- 1990-06-08 ES ES90909040T patent/ES2020901A4/en active Pending
- 1990-06-08 WO PCT/DE1990/000444 patent/WO1990015190A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
AU640148B2 (en) | 1993-08-19 |
EP0427847A1 (en) | 1991-05-22 |
AU5828290A (en) | 1991-01-07 |
WO1990015190A1 (en) | 1990-12-13 |
DE3918765A1 (en) | 1990-12-13 |
JPH04500250A (en) | 1992-01-16 |
ES2020901A4 (en) | 1991-10-16 |
DD299443A5 (en) | 1992-04-16 |
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