ITGE20090006A1 - "METHOD FOR OBTAINING SAFETY PAPER WITH EFFECT SIMILAR THROUGH SCREEN PRINTING OR OFFSET, AND COMPOSITION FOR THE IMPLEMENTATION OF SUCH METHOD". - Google Patents
"METHOD FOR OBTAINING SAFETY PAPER WITH EFFECT SIMILAR THROUGH SCREEN PRINTING OR OFFSET, AND COMPOSITION FOR THE IMPLEMENTATION OF SUCH METHOD". Download PDFInfo
- Publication number
- ITGE20090006A1 ITGE20090006A1 IT000006A ITGE20090006A ITGE20090006A1 IT GE20090006 A1 ITGE20090006 A1 IT GE20090006A1 IT 000006 A IT000006 A IT 000006A IT GE20090006 A ITGE20090006 A IT GE20090006A IT GE20090006 A1 ITGE20090006 A1 IT GE20090006A1
- Authority
- IT
- Italy
- Prior art keywords
- printing
- watermark
- security paper
- composition
- effect similar
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 18
- 230000000694 effects Effects 0.000 title claims description 12
- 238000007650 screen-printing Methods 0.000 title claims description 12
- 238000007639 printing Methods 0.000 claims description 15
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 claims description 8
- 238000007645 offset printing Methods 0.000 claims description 8
- VXKUOGVOWWPRNM-UHFFFAOYSA-N 3-ethoxypropyl acetate Chemical compound CCOCCCOC(C)=O VXKUOGVOWWPRNM-UHFFFAOYSA-N 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 239000003849 aromatic solvent Substances 0.000 claims description 4
- 229940116333 ethyl lactate Drugs 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- -1 butyl glycolate 1 methoxy-2propanol Chemical compound 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- LHENQXAPVKABON-UHFFFAOYSA-N 1-methoxypropan-1-ol Chemical compound CCC(O)OC LHENQXAPVKABON-UHFFFAOYSA-N 0.000 claims description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 239000011877 solvent mixture Substances 0.000 claims description 2
- 229920000159 gelatin Polymers 0.000 description 4
- 235000019322 gelatine Nutrition 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 239000001828 Gelatine Substances 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- VFGRALUHHHDIQI-UHFFFAOYSA-N butyl 2-hydroxyacetate Chemical compound CCCCOC(=O)CO VFGRALUHHHDIQI-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
-
- 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
- B41M3/10—Watermarks
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
-
- B42D2033/28—
-
- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/333—Watermarks
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
Description
DESCRIZIONE del brevetto per invenzione industriale avente per titolo: “Metodo per l'ottenimento di carta di sicurezza con effetto simile alla filigrana mediante stampa serigrafica o offset, e composizione per l'attuazione di detto metodo” DESCRIPTION of the patent for industrial invention entitled: "Method for obtaining security paper with an effect similar to watermark by silk-screen or offset printing, and composition for the implementation of this method"
TESTO DELLA DESCRIZIONE TEXT OF THE DESCRIPTION
La presente invenzione ha per oggetto un metodo per l'ottenimento di carta di sicurezza con effetto simile alla filigrana mediante stampa serigrafica o mediante stampa offset, nonché una composizione per l'attuazione di detto metodo. The present invention relates to a method for obtaining security paper with an effect similar to watermark by screen printing or by offset printing, as well as a composition for implementing said method.
E' noto che, a parità di altre condizioni, lo spessore del foglio di carta è uno degli elementi che ne determina la trasparenza alla luce: zone più sottili sono più trasparenti, e la loro osservazione è agevole ponendo il foglio controluce. Creando volutamente queste differenze di spessore si ottiene quella che viene denominata la "filigrana". It is known that, other things being equal, the thickness of the paper sheet is one of the elements that determines its transparency to light: thinner areas are more transparent, and their observation is easy by placing the sheet against the light. By deliberately creating these differences in thickness you get what is called the "watermark".
Molti sono i sistemi in uso per la realizzazione di una filigrana su un foglio di carta. Il sistema più antico, operante a umido, consiste nel formare su una tela un disegno in rilievo che al momento di ricevere l'impasto fibroso produrrà un foglio con quelle ineguaglianze di spessore che daranno al disegno l'effetto filigrana desiderato. There are many systems in use for creating a watermark on a sheet of paper. The most ancient system, operating wet, consists in forming a relief design on a canvas which, upon receiving the fibrous mixture, will produce a sheet with those inequalities in thickness that will give the drawing the desired filigree effect.
In alternativa al sistema ad umido su impasto fibroso, si può operare con un sistema a secco su un foglio finito. Secondo tale sistema, il foglio di carta preventivamente inumidito viene sottoposto a forte pressione sotto una matrice portante in rilievo il disegno desiderato. La maggiore pressione, nei punti di maggiore rilievo della matrice, darà minore spessore e maggiore compattezza al contesto fibroso e quindi maggiore trasparenza, con formazione del disegno in filigrana. As an alternative to the wet system on fibrous mixture, it is possible to operate with a dry system on a finished sheet. According to this system, the previously moistened sheet of paper is subjected to strong pressure under a matrix bearing the desired design in relief. The greater pressure, in the most prominent points of the matrix, will give less thickness and greater compactness to the fibrous context and therefore greater transparency, with the formation of the filigree design.
Questo secondo sistema pur essendo più pratico di quello ad umido, resta tuttavia notevolmente costoso dato che richiede l'uso di una pressa e l'approntamento di una matrice in acciaio per ciascun disegno che si desidera imprimere in filigrana. Although this second system is more practical than the wet one, it is nevertheless considerably expensive since it requires the use of a press and the preparation of a steel matrix for each design to be imprinted in filigree.
Costituisce pertanto lo scopo della presente invenzione un metodo per l'ottenimento di carta di sicurezza con effetto simile alla filigrana mediante stampa serigrafica o mediante stampa in offset. Therefore, the object of the present invention is a method for obtaining security paper with an effect similar to the watermark by silk-screen printing or by offset printing.
Ulteriore scopo della presente invenzione è una composizione per l'attuazione di detto metodo. A further object of the present invention is a composition for carrying out said method.
Il sistema di stampa serigrafica è ben noto. Secondo tale sistema per l'approntamento del cliché di stampa serigrafica si prepara dapprima su una pellicola di acetato di cellulosa, mediante un procedimento di stampa da computer o fotografico, il marchio da riprodurre in filigrana. The screen printing system is well known. According to this system for the preparation of the silk-screen printing plate, the brand to be reproduced in watermark is first prepared on a cellulose acetate film, by means of a computer or photographic printing process.
Successivamente, su un telaio costituito da una cornice nella quale è tesa una tela di seta sintetica coperta da uno strato di gelatina fotosensibile, si applica la pellicola in acetato di cellulosa recante il marchio da riprodurre in serigrafia, e il telaio con la pellicola viene esposto ad una sorgente di luce UV per qualche minuto. Questo trattamento rende insolubile all'acqua la gelatina che era stata esposta alla luce, mentre resta solubile quella parte di gelatina che era schermata dalla luce grazie all disegno del marchio. Si procede pertanto allo sviluppo del cliché serigrafico mediante un getto di acqua che rimuove la gelatina non insolubilizzata, facendo così emergere il cliché di stampa. A questo punto il cliché di stampa è pronto per l'uso. Subsequently, on a frame consisting of a frame in which a synthetic silk cloth covered with a layer of photosensitive gelatin is stretched, the cellulose acetate film is applied bearing the brand to be silkscreened, and the frame with the film is exposed to a UV light source for a few minutes. This treatment makes the gelatine that had been exposed to light insoluble to water, while that part of the gelatine that was shielded from light by the design of the brand remains soluble. Therefore, the screen printing cliché is developed by means of a jet of water which removes the non-insolubilized gelatin, thus making the printing cliché emerge. At this point the printing plate is ready for use.
Secondo la presente invenzione, per l'ottenimento di carta di sicurezza con effetto simile alla filigrana mediante un cliché per stampa serigrafica del tipo di cui sopra, è necessario procedere alla preparazione della composizione di stampa. According to the present invention, in order to obtain security paper with an effect similar to the watermark by means of a cliché for screen printing of the above type, it is necessary to proceed with the preparation of the printing composition.
A tale scopo, si prepara una composizione contenente, in percentuale in peso: For this purpose, a composition is prepared containing, in percentage by weight:
glicolato di butile dal 20% al 30% 20% to 30% butyl glycolate
1 metossi-2propanolo dal 19% al 29% 1 methoxy-2propanol from 19% to 29%
etil lattato dal 0% al 10% ethyl lactate 0% to 10%
Resina acrilica dal 22% al 32% 22% to 32% acrylic resin
Nafta solvente aromatica leggera dal 12% al 22 % Light aromatic solvent naphtha from 12% to 22%
Etossipropilacetato dal 0% al 7% Ethoxypropylacetate 0% to 7%
La resina acrilica è costituita acido poliacrilico o acido polimetacrilico o ancora da una miscela di questi due acidi. Essa ha lo scopo sia di regolare la viscosità del prodotto finale che di regolare il contrasto della filigrana chimica prodotta. Tale resina viene disciolta a freddo in una miscela solvente costituita dal 20 al 30% di gliconato di butile e dal 19 al 29% di 1-metossi propanolo, con la eventuale aggiunta di una percentuale massima del 10% di etil lattato. Alla soluzione così ottenuta si aggiunge dal 12 al 22 % di nafta solvente aromatica leggera e, se necessario per favorire la solubilità della nafta, si aggiunge sino al massimo del 7% di etossipropilacetato. Il composto fluido così ottenuto viene spalmato sul clichè di stampa preventivamente preparato, e si procede successivamente alla stampa su carta. The acrylic resin consists of polyacrylic acid or polymethacrylic acid or a mixture of these two acids. It has the purpose of both regulating the viscosity of the final product and regulating the contrast of the chemical watermark produced. This resin is cold dissolved in a solvent mixture consisting of 20 to 30% of butyl glyconate and 19 to 29% of 1-methoxy propanol, with the possible addition of a maximum percentage of 10% of ethyl lactate. To the solution thus obtained is added from 12 to 22% of light aromatic solvent naphtha and, if necessary to favor the solubility of the naphtha, up to a maximum of 7% of ethoxypropyl acetate is added. The fluid compound thus obtained is spread on the previously prepared printing plate, and then it is printed on paper.
In maniera del tutto sorprendente si ottiene sui fogli di carta una stampa serigrafica che presenta un effetto ottico del tutto analogo a quello ottenibile mediante i procedimenti di impressione della filigrana. In a completely surprising way, a silk-screen printing is obtained on the sheets of paper which has an optical effect which is entirely similar to that which can be obtained by means of the watermark printing procedures.
I vantaggi ottenibili con il procedimento e con la composizione di cui sopra sono evidenti. Il procedimento di creazione di una filigrana viene notevolmente semplificato. Il costo per l'approntamento del cliché di stampa è una frazione di quello necessario per la preparazione dei cliché di impressione usati nei procedimenti di realizzazione delle filigrane. Pertanto il costo finale risulta molto ridotto, mentre l'effetto di "sicurezza" fornito dalla stampa ottenute è del tutto paragonabile a quello ottenibile con i sistemi tradizionali di impressione di una filigrana. The advantages obtainable with the above process and composition are evident. The process of creating a watermark is greatly simplified. The cost for the preparation of the printing plate is a fraction of that necessary for the preparation of the printing plates used in the processes of making watermarks. Therefore, the final cost is very low, while the "security" effect provided by the printing obtained is completely comparable to that obtainable with traditional watermark printing systems.
Naturalmente la presente invenzione non è limitata a quanto descritto, ma comprende tutte quelle varianti e modifiche rientranti nell'ambito del concetto inventivo, sostanzialmente come a seguito rivendicato. Naturally, the present invention is not limited to what has been described, but includes all those variations and modifications falling within the scope of the inventive concept, substantially as claimed hereinafter.
Così, ad esempio, la composizione secondo l'invenzione può essere impiegata per il medesimo scopo invece che in un procedimento di stampa serigrafica, anche in combinazione con un procedimento di stampa offset, al posto dei comuni inchiostri di stampa. Thus, for example, the composition according to the invention can be used for the same purpose instead of in a screen printing process, also in combination with an offset printing process, instead of common printing inks.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000006A ITGE20090006A1 (en) | 2009-02-06 | 2009-02-06 | "METHOD FOR OBTAINING SAFETY PAPER WITH EFFECT SIMILAR THROUGH SCREEN PRINTING OR OFFSET, AND COMPOSITION FOR THE IMPLEMENTATION OF SUCH METHOD". |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000006A ITGE20090006A1 (en) | 2009-02-06 | 2009-02-06 | "METHOD FOR OBTAINING SAFETY PAPER WITH EFFECT SIMILAR THROUGH SCREEN PRINTING OR OFFSET, AND COMPOSITION FOR THE IMPLEMENTATION OF SUCH METHOD". |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ITGE20090006A1 true ITGE20090006A1 (en) | 2010-08-07 |
Family
ID=42041585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT000006A ITGE20090006A1 (en) | 2009-02-06 | 2009-02-06 | "METHOD FOR OBTAINING SAFETY PAPER WITH EFFECT SIMILAR THROUGH SCREEN PRINTING OR OFFSET, AND COMPOSITION FOR THE IMPLEMENTATION OF SUCH METHOD". |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | ITGE20090006A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3985927A (en) * | 1975-02-24 | 1976-10-12 | Nekoosa Edwards Paper Company, Inc. | Compositions and method for producing a chemical watermark on finished paper products |
| US4600629A (en) * | 1985-09-16 | 1986-07-15 | Westvaco Corporation | Selectively absorbent mask printing process |
| US4919044A (en) * | 1985-11-04 | 1990-04-24 | Westvaco Corporation | Simulated watermark printing system |
| EP1338431A2 (en) * | 2002-02-08 | 2003-08-27 | Fuji Photo Film Co., Ltd. | Visible image receiving material having surface hydrophilicity |
-
2009
- 2009-02-06 IT IT000006A patent/ITGE20090006A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3985927A (en) * | 1975-02-24 | 1976-10-12 | Nekoosa Edwards Paper Company, Inc. | Compositions and method for producing a chemical watermark on finished paper products |
| US4600629A (en) * | 1985-09-16 | 1986-07-15 | Westvaco Corporation | Selectively absorbent mask printing process |
| US4919044A (en) * | 1985-11-04 | 1990-04-24 | Westvaco Corporation | Simulated watermark printing system |
| EP1338431A2 (en) * | 2002-02-08 | 2003-08-27 | Fuji Photo Film Co., Ltd. | Visible image receiving material having surface hydrophilicity |
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