JP5477526B2 - Anti-counterfeit ink, anti-counterfeit medium and anti-counterfeit sticker - Google Patents
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- JP5477526B2 JP5477526B2 JP2008193283A JP2008193283A JP5477526B2 JP 5477526 B2 JP5477526 B2 JP 5477526B2 JP 2008193283 A JP2008193283 A JP 2008193283A JP 2008193283 A JP2008193283 A JP 2008193283A JP 5477526 B2 JP5477526 B2 JP 5477526B2
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- 238000010521 absorption reaction Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- 239000000049 pigment Substances 0.000 claims description 7
- 239000012790 adhesive layer Substances 0.000 claims description 6
- -1 phthalocyanine compound Chemical class 0.000 claims description 5
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 claims description 4
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 claims description 4
- 230000009878 intermolecular interaction Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000976 ink Substances 0.000 description 81
- 230000002265 prevention Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000002609 medium Substances 0.000 description 10
- 238000007639 printing Methods 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007645 offset printing Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000006659 ace medium Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical class [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
本発明は、印刷画像が目視においては黒色に見えるインキで構成される偽造防止インキおよび偽造防止媒体ならびに偽造防止ステッカーに係わり、特に、可視光領域の一部の波長の光を透過することを特徴とする偽造防止インキとこれを用いた偽造防止媒体ならびに偽造防止ステッカーに関する。 The present invention relates to an anti-counterfeit ink and an anti-counterfeit medium and an anti-counterfeit sticker, which are composed of ink that looks black when viewed visually, and in particular, transmits light of a part of the wavelength in the visible light region. The anti-counterfeit ink, the anti-counterfeit medium using the same, and the anti-counterfeit sticker.
従来から株券、債券、小切手、商品券、宝くじ、定期券等の証券類に記載される情報を機械により真正なものかどうかを判別する手段や、商品にステッカーを添付し真正かどうかを証明する手段として、バーコードやＯＣＲ文字等の機械読み取り可能なコードマークが設けられることが多く、この場合の偽造防止手段としては、赤外領域での吸収のない隠蔽層をコードマーク上に形成するか（特許文献１参照）、目視ではカーボンブラックと同じ黒色を示すが、赤外領域では吸収のない黒色インキを用いてダミーパターンを形成し、赤外領域での読み取りの有無によりコードマークを読み取るものがある（特許文献２参照）。 Traditionally, a means to determine whether the information on securities such as stock certificates, bonds, checks, gift certificates, lottery tickets, commuter passes, etc. is authentic by a machine, and a sticker attached to the product to prove whether it is authentic As a means, a machine-readable code mark such as a bar code or OCR character is often provided, and as a means for preventing forgery in this case, a concealing layer having no absorption in the infrared region is formed on the code mark. (See Patent Document 1) Visually showing the same black color as carbon black, but forming a dummy pattern using black ink that does not absorb in the infrared region, and reading the code mark based on the presence or absence of reading in the infrared region (See Patent Document 2).
例えば前者では、白色のインク及び黒色のインクの赤外線反射性及び赤外線吸収性を利用し、機械的に読み取り可能な情報をバーコード等のパターン状のマークを媒体などに付与し、これに赤外光を照射、マークを走査し、その反射赤外光の強度を二値化することにより記録された情報を読み取ることが記載されている。そして、情報が不正に読み取られないように可視光を遮断し、赤外光を透過する隠蔽層を形成し、可視光により容易に情報が読み取られることを防止することが記載されている。 For example, the former uses the infrared reflectivity and infrared absorptivity of white ink and black ink to give mechanically readable information to a medium such as a pattern mark such as a barcode. It is described that the recorded information is read by irradiating light, scanning a mark, and binarizing the intensity of the reflected infrared light. It also describes that visible light is blocked so that information is not read illegally, a concealing layer that transmits infrared light is formed, and information is prevented from being easily read by visible light.
また、後者は、目視的には同じ見え方であるが、赤外領域での分光特性に差のあるカーボンを用いた黒色の赤外線吸収インキと組み合わせ、印刷物の特定の箇所に真偽判別情報などを隠蔽させておき、照合時にその赤外領域での読み取りの有無により真偽判別情報を読み出し、その有無や真否により正当性を確認する場合に用いられる。例えばダミーとして用いる黒色で赤外領域に吸収の無いインキとして、シアン（藍）、イエロー（黄）、マゼンタ（赤）のプロセスインキの三原色を混合し、赤外線透過インキ組成物として利用されており、このように光学的特性の異なる２種類のインキ組成物が用いられてきた。また、別の例として、赤外線を透過する耐性の良い黒色インキとして、金属化合物である黒色顔料を主成分とするインキが知られている。 In addition, the latter looks the same visually, but in combination with black infrared absorbing ink using carbon that has a difference in spectral characteristics in the infrared region, authenticity determination information, etc. in a specific part of the printed matter Is used when the authenticity determination information is read based on the presence / absence of reading in the infrared region at the time of collation and the validity is confirmed based on the presence / absence or true / false. For example, as a black ink that is used as a dummy and has no absorption in the infrared region, three primary colors of cyan (indigo), yellow (yellow), and magenta (red) process inks are mixed and used as an infrared transmitting ink composition. Thus, two types of ink compositions having different optical properties have been used. As another example, an ink mainly composed of a black pigment which is a metal compound is known as a black ink having good resistance to transmit infrared rays.
特に、特定の真偽判別情報を印刷物中のマーク、模様、デザイン、文字、数字等などに合わせて同色で形成し隠蔽させることにより、複写機を用いて本物とほぼ同じように複写されても、複写物には全体に赤外領域に吸収を有するため、赤外線照射による照合では、真偽判別情報を確認することができないため、容易に真偽を判別することができる。なお、真正物は赤外領域に吸収の無いインキで形成された箇所が抜けて見えるため、容易に真偽判別情報を確認することができる。 In particular, it is possible to copy specific authenticity information in the same color according to marks, patterns, designs, letters, numbers, etc. in the printed material and conceal it, so that it can be copied almost the same as the real product using a copying machine. Since the entire copy has absorption in the infrared region, the authenticity determination information cannot be confirmed by the collation by infrared irradiation, so that the authenticity can be easily determined. In addition, since the part formed with the ink which has no absorption in the infrared region appears to be missing, the authenticity discrimination information can be easily confirmed.
しかしながら、上記条件で作製された時点での印刷物では、経時により退色、変色等の変化を生じ、赤外線吸収インキと赤外線透過インキの二種類のインキが、色の差となって表れるため、隠蔽された真偽判別情報が知られてしまう問題があった。また従来から用いられていた赤外領域に吸収の無いプロセスインキの三原色の混合により作製されていた赤外線透過インキ組成物は耐光性、耐熱性、耐溶剤性など、実用面における各種耐性に問題を有し、最も汎用的に使用されるプロセスインキにより作製が可能なため、コードの読み取りに関しては優れていたが、依然として複写等の偽造や変造等を有効に防止する手段と
しては不充分であった。また、赤外光の反射性を持ち、耐性を向上した黒色インキは金属を含むため、環境的に規制され使用し難いという問題点があった。
本発明は以上のような問題点に着目してなされたもので、太陽光や蛍光灯の下では目視にて黒色を呈するため、通常の墨インキに見え、かつ、可視光の一部の波長領域を透過する耐光性の高い偽造防止インキで構成することにより、任意の可視光と赤外光を照射し、その反射光を識別することにより、容易に真偽の判定ができる偽造防止インキ、これを用いた偽造防止媒体、又は偽造防止ステッカーを提供することにある。さらには、可視光の波長領域の一部の光を透過し、かつ、赤外光の一部の波長領域の光を吸収する偽造防止インキによって構成されることにより、真の情報の漏洩を予防する等に有効な偽造防止インキ、これを用いた偽造防止媒体、又は偽造防止ステッカーを提供する。 The present invention has been made paying attention to the above problems, and since it visually shows black under sunlight or a fluorescent lamp, it looks like normal black ink, and a part of the wavelength of visible light. By constituting the anti-counterfeiting ink with high light resistance that transmits through the region, by irradiating arbitrary visible light and infrared light and identifying the reflected light, the anti-counterfeiting ink that can easily determine the authenticity, An object is to provide a forgery prevention medium or a forgery prevention sticker using the same. Furthermore, it is configured with anti-counterfeit ink that transmits part of the visible light wavelength region and absorbs part of the infrared light wavelength region, thereby preventing true information leakage. The present invention provides an anti-counterfeit ink effective for, for example, an anti-counterfeit medium using the ink, or an anti-counterfeit sticker.
本発明において上記課題を解決するために、まず請求項１の発明では、４００〜１４００ｎｍの可視光および近赤外光の反射率が７０%以上の反射性基材上の、少なくとも一部の領域に、分子固有の吸収バンドと分子間相互作用に起因する吸収バンドの双方で可視光領域の波長を覆い、可視光の一部の波長は透過するが、太陽光および蛍光灯の下では目視にて黒色を呈し、７８０〜１４００ｎｍの近赤外光を透過するが、一部の領域に吸収を持つペリレン顔料にフタロシアニン化合物やシアニン化合物を混合した偽造防止インキにて、黒色の文字を設け、かつ、該文字は、７８０〜１４００ｎｍの近赤外光のうち、一部の波長領域に吸収を持ち、該文字とは重ならないように、マークを設け、該マークは、４００ｎｍ〜１４００ｎｍの可視光および近赤外光の反射率が３０％以下であることを特徴とする偽造防止媒体としたものである。
In order to solve the above-mentioned problems in the present invention, first , in the invention of claim 1 , at least a part of the region on the reflective base material having a reflectance of visible light of 400 to 1400 nm and near infrared light of 70% or more. In addition, the wavelength in the visible light region is covered by both the intrinsic absorption band of the molecule and the absorption band due to the intermolecular interaction, and a part of the visible light wavelength is transmitted. Black, and transmits near-infrared light of 780 to 1400 nm, but with anti-counterfeiting ink in which a perylene pigment having absorption in a part of the region is mixed with a phthalocyanine compound or a cyanine compound , black characters are provided, and , the character is 7 of the near-infrared light 80～1400Nm, Chi lifting the absorption part of the wavelength region, so as not to overlap with the character, provided a mark, the mark is visible 400nm~1400nm light And near-infrared light reflectance is obtained by the medium for preventing forgery, characterized in that 30% or less.
また請求項２の発明では、請求項１に記載の偽造防止媒体において、黒色の文字及びマークを設けた面とは逆の基材面に、粘着層が設けられていることを特徴とする偽造防止ステッカーとしたものである。 Further, in the invention of claim 2 , the forgery prevention medium according to claim 1 is characterized in that an adhesive layer is provided on the base material surface opposite to the surface on which black characters and marks are provided. It is a prevention sticker.
本発明は以上の構成であるから、下記に示す如き効果がある。 Since this invention is the above structure, there exist the following effects.
本発明の偽造防止インキ、偽造防止媒体、又は偽造防止ステッカーは、太陽光や蛍光灯の下では目視にて黒色を呈し、かつ、可視光の一部の波長領域を透過する耐光性の高い偽造防止インキで構成されていることにより、目視では通常の墨インキに見え、任意の可視光と赤外光を照射し、その反射光を識別することにより、容易に真偽の判定ができる偽造防止インキ、偽造防止媒体、又は偽造防止ステッカーを提供することができる。さらには、可視光の波長領域の一部の光を透過し、かつ、赤外光の一部の波長領域の光を吸収する偽造防止インキにより構成されることにより、読み取り波長として赤外線を適用しても、画像を読み取れず、あるいは、別の画像に読み取ってしまい、真の画像を認識することができないため、偽造の予防、改ざんの予防、その他の不正の予防、又は、もし不正があっても発見を容易とする、あるいは、真の情報の漏洩を予防する等に有効な偽造防止インキ、これを用いた偽造防止媒体、又は偽造防止ステッカーを提供できる。 The anti-counterfeit ink, the anti-counterfeit medium or the anti-counterfeit sticker of the present invention is a forgery with high light resistance that is visually black under sunlight or a fluorescent lamp and transmits a part of the wavelength region of visible light. Because it is made of anti-ink, it looks like normal black ink by visual inspection, and it can be easily judged whether it is authentic by irradiating arbitrary visible light and infrared light, and identifying the reflected light. Ink, anti-counterfeit media, or anti-counterfeit stickers can be provided. Furthermore, infrared light is applied as a reading wavelength by being composed of anti-counterfeit ink that transmits part of the visible light wavelength range and absorbs part of the infrared light wavelength range. However, the image cannot be read, or it is read in another image and the true image cannot be recognized, so that forgery prevention, tampering prevention, other fraud prevention, or fraud In addition, it is possible to provide an anti-counterfeit ink effective for facilitating discovery or preventing the leakage of true information, an anti-counterfeit medium using the anti-counterfeit ink, or an anti-counterfeit sticker.
以下、図面を用いて本発明の実施の形態を詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は、本発明の偽造防止ステッカーの一実施例を示す平面図であり、図２は図１の偽造防止ステッカーの一実施例のＸ−Ｘ線における断面図である。図３は、本発明の偽造防止インキの一実施例における波長と反射率の関係を表すグラフであり、図４は、図１の偽造防止ステッカーにおける反射画像情報を抽出する方法の一実施例を示す説明図である。図５は、図１の偽造防止ステッカーにおいて図４のカメラ２４で得られた画像である。 FIG. 1 is a plan view showing an embodiment of the anti-counterfeit sticker of the present invention, and FIG. 2 is a cross-sectional view taken along line XX of an embodiment of the anti-counterfeit sticker of FIG. FIG. 3 is a graph showing the relationship between wavelength and reflectance in an embodiment of the anti-counterfeit ink of the present invention, and FIG. 4 is an embodiment of a method for extracting reflected image information in the anti-counterfeit sticker of FIG. It is explanatory drawing shown. FIG. 5 is an image obtained by the camera 24 of FIG. 4 in the anti-counterfeit sticker of FIG.
図１及び図２に示すように、本発明の偽造防止ステッカーは、可視光および近赤外光反射性の基材１２の上の、少なくとも一部の領域に、本発明の偽造防止インキ１１にて黒色の印刷画像を儲け、黒色画像を設けた面とは逆の基材１２の面に、粘着層１３が設けられたものである。 As shown in FIGS. 1 and 2, the anti-counterfeit sticker of the present invention is applied to the anti-counterfeit ink 11 of the present invention in at least a part of the region on the visible light and near infrared light reflective base material 12. A black printed image is obtained, and the adhesive layer 13 is provided on the surface of the base material 12 opposite to the surface on which the black image is provided.
尚、本発明で云う可視光および近赤外光反射性の基材１２とは、可視光および近赤外光を反射する性質を持つ基材であり、特には、偽造防止インキ１１の反射率に比べて、かなり高い反射性を持つ基材が好適であり、反射率８０％以上であることが好ましい。紙の種類としては、アートコート紙、上質紙等の用紙、特殊証券用紙、白色のポリエステル樹脂シート、白色の塩化ビニルシートなどが使用可能である。 The visible light and near-infrared light-reflecting base material 12 referred to in the present invention is a base material having a property of reflecting visible light and near-infrared light, and in particular, the reflectance of the anti-counterfeit ink 11. Compared to the above, a substrate having a considerably high reflectivity is preferable, and the reflectivity is preferably 80% or more. As the paper type, paper such as art-coated paper and high-quality paper, special securities paper, white polyester resin sheet, white vinyl chloride sheet and the like can be used.
粘着層１３は、接する基材１２を変質させたり、侵したりするものでなければ、一般的な接着材料を用いることができる。例えば、塩化ビニル−酢酸ビニルの共重合体、ポリエステル系、ポリアミド、アクリル系、ブチルゴム系、天然ゴム系、シリコン系、ポリイソブチル系の粘着剤を単独、もしくは、アルキルメタクリレート、ビニルエステル、アクリルニトリル、スチレン、ビニルモノマー等の凝集成分、不飽和カルボン酸、ヒドロキシ基含有モノマー、アクリルニトリル等に代表される改質成分や重合開始剤、可塑剤、硬化剤、硬化促進剤、酸化防止剤等の添加剤を必要に応じて添加したものを用いることができる。
そして、この粘着層の形成には、公知のグラビア印刷法、オフセット印刷法、スクリーン印刷法などの塗布方法等を用いることができる。
As the adhesive layer 13, a general adhesive material can be used as long as it does not alter or invade the base material 12 in contact therewith. For example, vinyl chloride-vinyl acetate copolymer, polyester, polyamide, acrylic, butyl rubber, natural rubber, silicone, polyisobutyl adhesive alone, or alkyl methacrylate, vinyl ester, acrylonitrile, Addition of aggregating components such as styrene and vinyl monomers, unsaturated carboxylic acids, hydroxy group-containing monomers, modifying components such as acrylonitrile, polymerization initiators, plasticizers, curing agents, curing accelerators and antioxidants What added the agent as needed can be used.
For the formation of the adhesive layer, a known gravure printing method, an offset printing method, a coating method such as a screen printing method, or the like can be used.
可視光とは、一般に波長３８０〜７８０ｎｍの領域を言い、近赤外線は、７８０ｎｍ以上の長い波長域の光である。通常の墨インキは、可視光および近赤外光を吸収するため、どの色インキよりも、波長の広範囲の光を吸収する特徴を有する。一般的な色の認識として、色としては、それぞれの言葉により、また個人差により、微妙な色の認識の違いが見られるが、黒色の場合は共通である。そのため、異なる色が目視にて印刷された場合に判別されやすい。通常の印刷の墨インキに使用される顔料としては、例えばカーボンブラックが代表としてあげられるが、可視から近赤外までの光を吸収するため、目視に対しても高い隠蔽性を示すが、選択的な波長の読み取りに対しても、隠蔽してしまう。 Visible light generally refers to a region having a wavelength of 380 to 780 nm, and near infrared light is light having a long wavelength region of 780 nm or more. Ordinary black ink absorbs visible light and near-infrared light, and therefore has characteristics of absorbing light in a wide range of wavelengths than any color ink. As a general color recognition, there are subtle differences in color recognition depending on each word and individual differences, but in the case of black, it is common. Therefore, it is easy to discriminate when different colors are printed visually. Carbon black is a typical example of pigments used in black ink for normal printing, but because it absorbs light from the visible to the near infrared, it shows high concealment even for visual inspection. It is also concealed even when reading a typical wavelength.
偽造防止インキ１１は、印刷できるインキであって、オフセット印刷インキ、スクリーン印刷インキ、フレキソ印刷インキ、グラビア印刷インキ、インクジェットインク等の公知の印刷法にて使用できるインキであり、太陽光等の自然光や通常使用される蛍光灯の下で、目視では黒色と認識するが、可視光の一部の波長領域を透過する特性を有する。偽造防止インキ１１としては、例えば、ペリレン顔料を用いたインキが使用可能である。前記ペリレン顔料は、分子固有の吸収バンドと分子間相互作用に起因する吸収バンドの双方で可視光領域の波長を覆い、可視光の一部の波長は透過するが、黒色を呈する。目視では黒色に観察できるため、意匠性については従来通りに、問題なく設けることができる。 The anti-counterfeit ink 11 is a printable ink that can be used in a known printing method such as offset printing ink, screen printing ink, flexographic printing ink, gravure printing ink, inkjet ink, and natural light such as sunlight. Under a fluorescent lamp that is usually used, it is visually recognized as black, but has a characteristic of transmitting a part of the wavelength region of visible light. As the anti-counterfeit ink 11, for example, an ink using a perylene pigment can be used. The perylene pigment covers the wavelength in the visible light region with both the absorption band inherent to the molecule and the absorption band resulting from the intermolecular interaction, and transmits a part of the visible light wavelength, but exhibits a black color. Since it can be observed in black by visual observation, the design can be provided without any problem as usual.
さらに、偽造防止インキ１１は、図３の３１に示すように、近赤外吸収剤を混合することにより、可視光の一部から近赤外光にかけて透過するが、近赤外光の一部に吸収を持つことにより、より複雑な分光特性をつくることができ、容易に機械で読み取ろうとしても難しく、また、複数の波長での読み取りを行うため、同様な波長の偽造防止インキをつくることも難しい。使用できる近赤外線吸収材としては、フタロシアニン化合物やシアニン化合物等の公知の近赤外吸収剤が挙げられ、その他であっても充分な赤外吸収性能を有するものであれば良いが、近赤外線の波長域において短い領域、具体的には８００ｎｍ付近には吸収がなく、より波長の長い領域の光を吸収するものが望ましい。 Furthermore, as shown in 31 of FIG. 3, the anti-counterfeit ink 11 is transmitted from a part of visible light to a near infrared light by mixing a near infrared absorber, but a part of the near infrared light is transmitted. Can absorb more complex spectral characteristics, making it difficult to read easily with a machine, and for reading at multiple wavelengths, make anti-counterfeit inks with similar wavelengths. It is also difficult. Examples of the near-infrared absorbing material that can be used include known near-infrared absorbers such as phthalocyanine compounds and cyanine compounds, and any other materials that have sufficient infrared absorption performance may be used. It is desirable to absorb light in a short region in the wavelength range, specifically, in the vicinity of 800 nm and absorb light in a longer wavelength region.
図４は、本発明の偽造防止インキの検証方法の一実施例を示している。図４からわかるように、偽造防止インキの画像抽出にあたっては、まず、偽造防止インキ１１印刷面に対して照射した光の反射状態を、偽造防止インキの可視光の吸収のない任意の波長域を透過するバンドパスフィルター２３と、偽造防止インキの光を吸収する任意の赤外域を透過するバンドパスフィルター２５とのそれぞれを介して画像情報を読み取り装置によって情報を読み取る。 FIG. 4 shows an embodiment of the verification method of the anti-counterfeit ink of the present invention. As can be seen from FIG. 4, when extracting the image of the anti-counterfeit ink, first, the reflection state of the light irradiated on the printing surface of the anti-counterfeit ink 11 is set to an arbitrary wavelength region where the anti-counterfeit ink does not absorb visible light. The image information is read by a reading device through each of the band-pass filter 23 that transmits and the band-pass filter 25 that transmits an arbitrary infrared region that absorbs the light of the anti-counterfeit ink.
具体的には、偽造防止インキ印刷面に対して、光源２１から照射した反射光の５０％を反射し、５０％を透過するビームスプリッター２２まで導き、そこで反射した光はカメラ２４側に、透過した光はカメラ２６側に、導くように２分割される。そして、それぞれ分割された光をそれぞれのバンドパスフィルター２３、２５を介して、読み取り装置で読み取り、真偽判定を行う。 Specifically, 50% of the reflected light emitted from the light source 21 is reflected to the anti-counterfeit ink printing surface and guided to the beam splitter 22 that transmits 50%, and the reflected light is transmitted to the camera 24 side. The light is divided into two so as to be guided to the camera 26 side. Then, the divided light is read by the reading device via the respective bandpass filters 23 and 25, and authenticity determination is performed.
このようにして、反射光を読み取ると、偽造防止インキ１１で印刷した場合と通常の墨インキや赤外を透過する墨インキ、赤外吸収インキとは異なって検出され、不正があっても発見を容易とする、あるいは、真の情報の漏洩を予防する等に有効な偽造防止インキとこれを用いた偽造防止媒体ならびに偽造防止ステッカーを提供できる。 In this way, when the reflected light is read, it is detected differently from the case of printing with the anti-counterfeiting ink 11 and the normal black ink, the black ink that transmits infrared rays, and the infrared absorption ink, and even if there is a fraud It is possible to provide an anti-counterfeit ink effective for preventing the leakage of true information, an anti-counterfeit medium and an anti-counterfeit sticker using the same.
以下に、本発明の実施例を具体的に説明する。 Examples of the present invention will be specifically described below.
可視光および近赤外光の反射性基材として、白色系の上質タック紙上にオフセット印刷法で、下記の通常の墨インキにて文字を、下記の本発明の偽造防止インキにてマークを、それぞれ厚さ１μｍ印刷し、本発明の実施例１の偽造防止ステッカーを得た。
［通常の墨インキ］
ＦＤ カルトンＡＣＥ スミ ロ （東洋インキ社製）
［本発明の偽造防止インキ］
ＹＫＲ−３０８１（山本化成社製） ５部
Ｃ．Ｉ．Ｐｉｇｍｅｎｔ Ｂｌａｃｋ ３１ １５部
ＦＤ カルトン ＡＣＥ メジウム ロ （東洋インキ社製） ８０部
実施例１の偽造防止ステッカーを図１に示す。
As a reflective substrate for visible light and near-infrared light, an offset printing method is used on white high-quality tack paper, characters are printed with the following normal black ink, and marks are printed with the following anti-counterfeit ink of the present invention. Each was printed with a thickness of 1 μm to obtain a forgery prevention sticker of Example 1 of the present invention.
[Normal black ink]
FD Carton ACE Sumiro (Toyo Ink Co., Ltd.)
[Anti-counterfeit ink of the present invention]
YKR-3081 (manufactured by Yamamoto Kasei Co., Ltd.) 5 parts C.I. I. Pigment Black 31 15 parts FD Carton ACE Medium Lo (Toyo Ink Co., Ltd.) 80 parts
The forgery prevention sticker of Example 1 is shown in FIG.
実施例１において図形部分（マーク）を下記の赤外線透過性の墨インキにて、設けた以外は、同様にして、実施例２のステッカーを得た。
［赤外光透過性の墨インキ］
改ＵＶＨＲ ＦＬ コンク墨 （Ｔ＆Ｋ ＴＯＫＡ社製）
実施例２は、実施例１と比較するためのものである。
A sticker of Example 2 was obtained in the same manner as in Example 1 except that the graphic part (mark) was provided with the following infrared-transmissive black ink.
[Infrared light-transmitting black ink]
Modified UVHR FL Conch ink (manufactured by T & K TOKA)
Example 2 is for comparison with Example 1.
実施例１の偽造防止ステッカーは、通常の墨インキも本発明の偽造防止インキも共に目視では黒色の絵柄が確認されるが、カメラ２４で画像を見ると、図５のように通常の墨インキのみを見ることができ、カメラ２６で画像を見ると目視画像と同様の画像を見ることができ、両方を同時に読み取ることにより、認証することができた。また、実施例２のステッカーでは、カメラ２４で目視画像と同様の画像が見え、カメラ２６で図５のように通常の墨インキのみの文字部分の画像が観察され、本発明の偽造防止インキとは異なることが判別できた。 In the anti-counterfeit sticker of Example 1, both the normal black ink and the anti-counterfeit ink of the present invention visually confirm a black pattern, but when the image is viewed with the camera 24, the normal black ink is used as shown in FIG. When the image was seen with the camera 26, an image similar to the visual image could be seen, and authentication was possible by reading both simultaneously. Further, in the sticker of Example 2, an image similar to the visual image can be seen with the camera 24, and the image of the character portion of only ordinary black ink is observed with the camera 26 as shown in FIG. Was different.
さらに、上記の偽造防止ステッカーをキセノンフェードメータに入れて、耐光性を観察した。実施例２の赤外光透過性の墨インキは、２４時間後目視にて緑色に変色したが、本発明による墨インキは、２４０時間後でも変色は見られず、耐光性の高い偽造防止インキにより印刷された偽造防止ステッカーが得られた。 Furthermore, the anti-counterfeit sticker was put in a xenon fade meter, and light resistance was observed. The infrared light-transmitting black ink of Example 2 was visually changed to green after 24 hours, but the black ink according to the present invention showed no discoloration even after 240 hours and had high light resistance. The anti-counterfeit sticker printed by was obtained.
１…偽造防止ステッカー
１０…通常の墨インキ
１１…偽造防止インキ
１２…基材
１３…粘着層
２１…光源
２２…５０Ｒ／５０Ｔビームスプリッター
２３、２５…バンドパスフィルター
２４、２６…カメラ
３１…偽造防止インキの分光特性
３２…通常の墨インキの分光特性
DESCRIPTION OF SYMBOLS 1 ... Anti-counterfeit sticker 10 ... Normal black ink 11 ... Anti-counterfeit ink 12 ... Base material 13 ... Adhesive layer 21 ... Light source 22 ... 50R / 50T beam splitter 23, 25 ... Band pass filter 24, 26 ... Camera 31 ... Anti-counterfeit Spectral characteristics of ink 32 ... Spectral characteristics of normal black ink
Claims (2)
The anti-counterfeit medium according to claim 1 , wherein an adhesive layer is provided on a base material surface opposite to a surface provided with black characters and marks .
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| JP2009149068A (en) * | 2007-11-29 | 2009-07-09 | Toppan Printing Co Ltd | Anti-counterfeit printed matter and verification method using the same |
| JP2010182276A (en) * | 2009-01-09 | 2010-08-19 | Okuto Sangyo Kk | Detection apparatus, information discrimination system, detection subject, article to be identified and electronic equipment |
| JP2011238076A (en) * | 2010-05-11 | 2011-11-24 | Octo Corp | Detection apparatus, information determination system, body to be detected, identification body, and electronic device |
| JP5832010B2 (en) * | 2011-06-21 | 2015-12-16 | 小林クリエイト株式会社 | Optical reading form |
| JP5891708B2 (en) | 2011-10-28 | 2016-03-23 | セイコーエプソン株式会社 | Printing device |
| JP2015122126A (en) * | 2015-04-02 | 2015-07-02 | オクト産業株式会社 | Detection apparatus, information determination system, body to be detected, identification body, and electronic device |
| JP6272632B2 (en) * | 2017-02-02 | 2018-01-31 | オクト産業株式会社 | Detection device, detected object, identification object, and electronic device |
| CN110288068B (en) * | 2019-06-25 | 2023-02-17 | 中国计量大学 | Anti-counterfeiting two-dimensional code manufacturing method and anti-counterfeiting two-dimensional code |
| WO2021049381A1 (en) * | 2019-09-13 | 2021-03-18 | 共同印刷株式会社 | Printed object |
| JP7417278B2 (en) * | 2021-01-15 | 2024-01-18 | 昭北ラミネート工業株式会社 | Packaging sheet for PTP |
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| JP4314811B2 (en) * | 2002-11-19 | 2009-08-19 | 住友金属鉱山株式会社 | Anti-counterfeit ink and anti-counterfeit printed matter |
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