JPH0348038B2 - - Google Patents
Info
- Publication number
- JPH0348038B2 JPH0348038B2 JP57092155A JP9215582A JPH0348038B2 JP H0348038 B2 JPH0348038 B2 JP H0348038B2 JP 57092155 A JP57092155 A JP 57092155A JP 9215582 A JP9215582 A JP 9215582A JP H0348038 B2 JPH0348038 B2 JP H0348038B2
- Authority
- JP
- Japan
- Prior art keywords
- electron
- plain paper
- color developer
- colorless dye
- donating colorless
- 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.)
- Expired - Lifetime
Links
- 239000002904 solvent Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000003094 microcapsule Substances 0.000 claims description 9
- 239000011162 core material Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 description 6
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229960004889 salicylic acid Drugs 0.000 description 3
- -1 α-methylbenzyl Chemical group 0.000 description 3
- WNZQDUSMALZDQF-UHFFFAOYSA-N 2-benzofuran-1(3H)-one Chemical compound C1=CC=C2C(=O)OCC2=C1 WNZQDUSMALZDQF-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 239000003759 ester based solvent Substances 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IKCLCGXPQILATA-UHFFFAOYSA-N 2-chlorobenzoic acid Chemical compound OC(=O)C1=CC=CC=C1Cl IKCLCGXPQILATA-UHFFFAOYSA-N 0.000 description 1
- MQJTWPAGXWPEKU-UHFFFAOYSA-N 3-[4-(dimethylamino)phenyl]-3-(1,2-dimethylindol-3-yl)-2-benzofuran-1-one Chemical compound C1=CC(N(C)C)=CC=C1C1(C=2C3=CC=CC=C3N(C)C=2C)C2=CC=CC=C2C(=O)O1 MQJTWPAGXWPEKU-UHFFFAOYSA-N 0.000 description 1
- ZKUWHPNJONEJEE-UHFFFAOYSA-N 3-[4-(dimethylamino)phenyl]-3-(2-methyl-1h-indol-3-yl)-2-benzofuran-1-one Chemical compound C1=CC(N(C)C)=CC=C1C1(C=2C3=CC=CC=C3NC=2C)C2=CC=CC=C2C(=O)O1 ZKUWHPNJONEJEE-UHFFFAOYSA-N 0.000 description 1
- WKMGGJIKSXAHAM-UHFFFAOYSA-N 3-[4-(dimethylamino)phenyl]-3-(2-phenyl-1h-indol-3-yl)-2-benzofuran-1-one Chemical compound C1=CC(N(C)C)=CC=C1C1(C=2C3=CC=CC=C3NC=2C=2C=CC=CC=2)C2=CC=CC=C2C(=O)O1 WKMGGJIKSXAHAM-UHFFFAOYSA-N 0.000 description 1
- DPTAYXRMLJNOCN-UHFFFAOYSA-N 5-(dimethylamino)-3h-2-benzofuran-1-one Chemical compound CN(C)C1=CC=C2C(=O)OCC2=C1 DPTAYXRMLJNOCN-UHFFFAOYSA-N 0.000 description 1
- XAICWTLLSRXZPB-UHFFFAOYSA-N 5-tert-butyl-2-hydroxybenzoic acid Chemical compound CC(C)(C)C1=CC=C(O)C(C(O)=O)=C1 XAICWTLLSRXZPB-UHFFFAOYSA-N 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- 241000272165 Charadriidae Species 0.000 description 1
- 238000012695 Interfacial polymerization Methods 0.000 description 1
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical class CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-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
- 239000002253 acid Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- MHDVGSVTJDSBDK-UHFFFAOYSA-N dibenzyl ether Chemical compound C=1C=CC=CC=1COCC1=CC=CC=C1 MHDVGSVTJDSBDK-UHFFFAOYSA-N 0.000 description 1
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- ZWLPBLYKEWSWPD-UHFFFAOYSA-N o-toluic acid Chemical compound CC1=CC=CC=C1C(O)=O ZWLPBLYKEWSWPD-UHFFFAOYSA-N 0.000 description 1
- 235000015205 orange juice Nutrition 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 150000003413 spiro compounds Chemical class 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000004897 thiazines Chemical class 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229940100445 wheat starch Drugs 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
Description
【発明の詳細な説明】
本発明は、普通紙面に転写された電子受容性の
顕色剤又は電子供与性の無色染料からなる潜像を
得るための秘密文書作成方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a secret document preparation method for obtaining a latent image made of an electron-accepting color developer or an electron-donating colorless dye transferred onto a plain paper surface.
従来、秘密文書作成には、あぶりだしなるもの
があつた。これは普通紙に特定の溶液で絵や文字
を書いて乾かすと、書いたあとは見えにくくなる
がこの普通紙を火であぶると再び絵や文字が現わ
れてくるもので、例えば塩化コバルトによる青色
発色、希硫酸によるセルロースの炭化による黒色
化、みかんのしぼり汁による黒褐色などがある。 Traditionally, creating secret documents involved exposing them. This is when you write pictures or letters on plain paper with a specific solution and let it dry. After the writing, it becomes difficult to see, but when you burn the plain paper with fire, the pictures and letters will reappear. For example, it is caused by the blue color caused by cobalt chloride. Color development, blackening due to carbonization of cellulose with dilute sulfuric acid, and blackish brown due to squeezed orange juice.
しかし、このあぶりだしなるものはあぶる前か
ら変色がみられ、目的とする要求に相当するもの
ではない。 However, this roasted product shows discoloration even before it is roasted, and does not meet the intended requirements.
一方、特開昭56−75658号公報には磁気記録シ
ートに磁気潜像を得る秘密文書作成用記録体なる
ものがある。これは感圧紙、磁気記録シートおよ
び高透磁率材料を順次積層し、磁気ペンで前記感
圧紙上より押圧することにより磁気潜像を得るも
のである。この方式によれば記録時には感圧紙に
より可視像を見ながら磁気記録ができるという利
点があるが、磁気ペン、磁気性粉を用いる煩雑さ
がある。 On the other hand, JP-A-56-75658 discloses a recording medium for producing secret documents which obtains a magnetic latent image on a magnetic recording sheet. In this method, pressure-sensitive paper, a magnetic recording sheet, and a high magnetic permeability material are sequentially laminated, and a magnetic latent image is obtained by pressing the pressure-sensitive paper with a magnetic pen. This method has the advantage that magnetic recording can be performed while viewing a visible image using pressure-sensitive paper during recording, but it is complicated by the use of a magnetic pen and magnetic powder.
本発明者らは、上記欠点を解決するため研究を
行なつた結果、電子受容性の顕色剤又は電子供与
性の無色染料を不揮発性溶媒に溶解又は分散した
ものを芯物質とするマイクロカプセルを支持体の
裏面に印刷又は塗布してなる普通紙転写型記録層
を持つ秘密文書作成用転写シートと普通紙と重ね
て押圧することにより、普通紙面に転写された電
子受容性の顕色剤又は電子供与性の無色染料から
なる潜像を得る秘密文書作成方法を提供するもの
である。 As a result of research to solve the above drawbacks, the present inventors discovered microcapsules whose core material is an electron-accepting color developer or an electron-donating colorless dye dissolved or dispersed in a non-volatile solvent. An electron-accepting color developer is transferred to the surface of the plain paper by stacking and pressing a transfer sheet for secret document creation which has a plain paper transfer type recording layer printed or coated on the back side of the support with plain paper. Alternatively, the present invention provides a method for producing a secret document by obtaining a latent image made of an electron-donating colorless dye.
本発明の目的は、上記秘密文書作成用転写シー
トと普通紙を重ねて該転写シートの非塗布面上よ
りボールペンなどの筆圧により加圧印字したと
き、該転写シート非塗布面の印字と同時に塗布面
のマイクロカプセルが破壊され、電子受容性の顕
色剤又は電子供与性の無色染料を溶解又は分散し
た不揮発性溶媒が普通紙面上に転写され潜像を得
ることである。得られた潜像は、電子供与性の無
色染料又は電子受容性の顕色剤を揮発性有機溶媒
に溶解した溶液を噴霧させることにより発色さ
せ、着色印字像として識別することができる。し
かし、該無色染料溶液又は該顕色剤を噴霧させな
い限り潜像は目視では識別不可能である。 An object of the present invention is to overlap the above-mentioned transfer sheet for creating secret documents with plain paper and perform pressure printing from the non-coated surface of the transfer sheet using pen pressure from a ballpoint pen or the like, and to simultaneously print on the non-coated surface of the transfer sheet. The microcapsules on the coated surface are destroyed, and a nonvolatile solvent in which an electron-accepting color developer or an electron-donating colorless dye is dissolved or dispersed is transferred onto the plain paper surface to obtain a latent image. The obtained latent image is colored by spraying a solution of an electron-donating colorless dye or an electron-accepting color developer dissolved in a volatile organic solvent, and can be identified as a colored printed image. However, the latent image cannot be visually discerned unless the colorless dye solution or the color developer is sprayed.
本発明に用いられる電子受容性の顕色剤は不揮
発性溶媒に５〜50重量パーセント溶解又は分散さ
せたものを芯物質としてマイクロカプセル化させ
ることが普通紙面への転写性において良く、更に
20〜40重量パーセントが好ましい。 The electron-accepting color developer used in the present invention can be dissolved or dispersed in a non-volatile solvent at 5 to 50% by weight and then micro-encapsulated as a core material for better transferability to the surface of plain paper.
20-40 weight percent is preferred.
上記に規定したのは規定外の低い方では、着色
印字像の濃度が低く、又高い方では芯物質の粘性
が増大し、転写性を悪くする欠点をもつことによ
るものである。 The reason for the above stipulation is that if the density is lower than the specified range, the density of the colored printed image will be low, and if it is higher than the range, the viscosity of the core material will increase, resulting in a drawback that the transferability will be deteriorated.
本発明に用いられる電子供与性の無色染料は不
揮発性溶媒に２〜20重量パーセント溶解又は分散
させたものを芯物質としてマイクロカプセル化さ
せることが普通紙面への転写性において良く、更
に５〜15重量パーセントが好ましい。 The electron-donating colorless dye used in the present invention is preferably dissolved or dispersed in a non-volatile solvent at 2 to 20% by weight and microencapsulated as a core material for good transferability to the surface of ordinary paper. Weight percentages are preferred.
ところで本発明に用いられる電子受容性の顕色
剤含有マイクロカプセルについては種々のマイク
ロカプセル化法即ちコンプレツクス・コアセルベ
ーシヨン法、界面重合法、in situ法、スプレー
ドライ法、液中硬化法など適宜利用できる。 By the way, various microencapsulation methods including complex coacervation method, interfacial polymerization method, in situ method, spray drying method, and in-liquid curing method can be used for the electron-accepting color developer-containing microcapsules used in the present invention. etc. can be used as appropriate.
普通紙面への塗布又は印刷方法としては、作成
したマイクロカプセルに応じて、例えばマイクロ
カプセル水分散液ではエアーナイフコーターなど
による水性塗布する方法、脱水して有機溶媒に代
替して、或いは粉体カプセルとして有機溶媒と共
にグラビア印刷又はフレキソ印刷をする方法、更
にマイクロカプセルを粉体化してワツクス類と共
に混合してホツトメルト印刷をする方法など適宜
必要とする方法を選ぶことができる。 The method for coating or printing on plain paper depends on the microcapsules created, for example, in the case of an aqueous dispersion of microcapsules, an aqueous coating method using an air knife coater or the like, dehydration and substituting an organic solvent, or powder capsules. Any method can be selected as appropriate, such as gravure printing or flexographic printing with an organic solvent, or hot melt printing by powdering the microcapsules and mixing them with wax.
本発明に用いられる電子受容性の顕色剤として
は、置換フエノール、フエノール−ホルマリン縮
合物、アルキル置換フエノール−ホルマリン縮合
物、アリール置換フエノール−ホルマリン縮合物
などのフエノール系顕色剤とその金属塩、安息香
酸、クロル安息香酸、トルイル酸、サリチル酸、
５−tert−ブチルサリチル酸、3.5−ジ−tert−ブ
チルサリチル酸、3.5−ジ（α−メチルベンジル）
サリチル酸等のサリチル酸系顕色剤とその金属塩
など単独又は組み合わせて使用できる。 Electron-accepting color developers used in the present invention include phenolic color developers such as substituted phenols, phenol-formalin condensates, alkyl-substituted phenol-formalin condensates, and aryl-substituted phenol-formalin condensates, and metal salts thereof. , benzoic acid, chlorobenzoic acid, toluic acid, salicylic acid,
5-tert-butylsalicylic acid, 3.5-di-tert-butylsalicylic acid, 3.5-di(α-methylbenzyl)
Salicylic acid color developers such as salicylic acid and metal salts thereof can be used alone or in combination.
本発明に用いられる不揮発性溶媒としては、ア
ルキルナフタレン系、塩素化パラフイン系、ジア
リールエタン系、アルキルジフエニル系、芳香族
エステル系、脂肪族エステル系など単独又は組合
わせて使用できる。 As the nonvolatile solvent used in the present invention, alkylnaphthalene-based solvents, chlorinated paraffin-based solvents, diarylethane-based solvents, alkyl diphenyl-based solvents, aromatic ester-based solvents, aliphatic ester-based solvents, etc. can be used alone or in combination.
本発明に用いられる電子供与性の無色染料につ
いては、例えば、3.3−ビス（ｐ−ジメチルアミ
ノフエニル）−６−ジメチルアミノフタリド、3.3
−ビス（ｐ−ジメチルアミノフエニル）フタリ
ド、３−（ｐ−ジメチルアミノフエニル）−３−
（１，２−ジメチルインドール−３−イル）フタ
リド、３−（ｐ−ジメチルアミノフエニル）−３−
（２−メチルインドール−３−イル）フタリド、
３−（ｐ−ジメチルアミノフエニル）−３−（２−
フエニルインドール−３−イル）フタリド、3.3
−ビス（９−エチルカルバゾール−３−イル）−
５−ジメチルアミノフタリドなどのトリアリール
メタン系化合物。4.4′−ビス−ジメチルアミノベ
ンズヒドリンベンジルエーテル、Ｎ−ハロフエニ
ル−ロイコオーラミン、Ｎ−2.4.5−トリクロロ
フエニルロイコオーラミン等のジメチルメタン系
化合物、ローダミンＢ−アニリノラクタム、３−
ジメチルアミノ−７−メトキシフルオラン、５−
ジエチルアミノ−７−クロロフルオラン、３−ジ
エチルアミノ−6.8−ジメチルフルオラン、３−
ジエチルアミノ−７−メチルアミノフルオラン、
6.7−ジエチルアミノフルオラン、３−ジエチル
アミノ−７−ジベンジルアミノフルオラン、３−
ジエチルアミノ−クロロエチルメチルアミノフル
オラン等のキサンテン系化合物、ベンゾイルロイ
コメチレンブル、ｐ−ニトロベンジルロイコメチ
レンブルー等のチアジン系化合物、３−メチルー
スピロジナフトピラン、３−エチル−スピロジナ
フトピラン、3.3′−ジクロロスピロジナフトピラ
ン、３−プロピル−スピロジベンゾピラン等のス
ピロ系化合物などの発色剤が単独または組合わせ
て使用できる。 Examples of the electron-donating colorless dye used in the present invention include 3.3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide, 3.3
-bis(p-dimethylaminophenyl)phthalide, 3-(p-dimethylaminophenyl)-3-
(1,2-dimethylindol-3-yl)phthalide, 3-(p-dimethylaminophenyl)-3-
(2-methylindol-3-yl)phthalide,
3-(p-dimethylaminophenyl)-3-(2-
Phenylindol-3-yl)phthalide, 3.3
-bis(9-ethylcarbazol-3-yl)-
Triarylmethane compounds such as 5-dimethylaminophthalide. Dimethylmethane compounds such as 4.4'-bis-dimethylaminobenzhydrin benzyl ether, N-halophenyl-leucoauramine, N-2.4.5-trichlorophenylleucoauramine, rhodamine B-anilinolactam, 3-
Dimethylamino-7-methoxyfluorane, 5-
Diethylamino-7-chlorofluorane, 3-diethylamino-6.8-dimethylfluorane, 3-
diethylamino-7-methylaminofluorane,
6.7-diethylaminofluorane, 3-diethylamino-7-dibenzylaminofluorane, 3-
Xanthene compounds such as diethylamino-chloroethylmethylaminofluorane, thiazine compounds such as benzoylleucomethylene blue and p-nitrobenzylleucomethylene blue, 3-methyl-spirodinaphthopyran, 3-ethyl-spirodinaphthopyran, 3.3 Coloring agents such as spiro compounds such as '-dichlorospirodinaphthopyran and 3-propyl-spirodibenzopyran can be used alone or in combination.
本発明による電子受容性の顕色剤含有マイクロ
カプセル又は電子供与性の無色染料に加えて、ス
チルト、結合剤、分散剤など適宜添加することが
できるが、これら例示した添加剤に限定されるも
のではないことは明らかである。 In addition to the electron-accepting color developer-containing microcapsules or electron-donating colorless dye according to the present invention, stilts, binders, dispersants, etc. can be added as appropriate, but the additives are limited to these exemplified additives. It is clear that this is not the case.
本発明による記録層を形成させる支持体として
は紙が主として用いられるが、各種不織布、プラ
スチツクフイルム、合成紙、金属箔など、或いは
これらを組合わせた複合シートも用いられる。特
に、エンボスさせたシートとすることが転写時の
潜像としては望ましい方向である。 Paper is mainly used as the support for forming the recording layer according to the present invention, but various nonwoven fabrics, plastic films, synthetic papers, metal foils, etc., or composite sheets made of a combination of these may also be used. In particular, it is desirable to use an embossed sheet as a latent image during transfer.
以下、実施例をあげて本発明を具体的に説明す
る。なお、「部」及びパーセントは各々重量部及
び重量パーセントを示す。 Hereinafter, the present invention will be specifically explained with reference to Examples. Note that "parts" and percentages indicate parts by weight and percentages by weight, respectively.
実施例
パラ−フエニル−フエノール−ホルマリン樹脂
を含有するマイクロカプセルは次の如く作成し
た。Example Microcapsules containing para-phenyl-phenol-formalin resin were prepared as follows.
エチレン−無水マレイン酸共重合体の10％水溶
液100部、尿素10部、レゾルシン１部および水200
部を混合溶液とし、20％水酸化ナトリウム水溶液
を用いてPH3.5に調節した。パラ−フエニル−フ
エノール−ホルマリン樹脂60部をハイゾール
SAS Ｎ−296〔ジアリールエタン系溶剤、日本石
油化学社製〕140部に溶解し、顕色剤溶液とした。
この顕色剤溶液を上記混合水溶液に乳化分散し、
油滴が５〜6μとなつたところで37％ホルマリン
水溶液25部を加え撹拌しながら系の温度を55℃に
保つた。２時間反応させたのち、冷却し、系のPH
を9.5としカプセル化を終了した。 100 parts of a 10% aqueous solution of ethylene-maleic anhydride copolymer, 10 parts of urea, 1 part of resorcinol, and 200 parts of water
A mixed solution was prepared, and the pH was adjusted to 3.5 using a 20% aqueous sodium hydroxide solution. Add 60 parts of para-phenyl-phenol-formalin resin to Hysol
It was dissolved in 140 parts of SAS N-296 [diarylethane solvent, manufactured by Nippon Petrochemicals Co., Ltd.] to prepare a color developer solution.
This color developer solution is emulsified and dispersed in the above mixed aqueous solution,
When the oil droplets had a size of 5 to 6 μm, 25 parts of a 37% formalin aqueous solution was added and the temperature of the system was maintained at 55° C. with stirring. After reacting for 2 hours, cool and adjust the pH of the system.
9.5 and finished encapsulation.
上記のようにして作成したパラ−フエニル−フ
エノール−ホルマリン樹脂含有カプセル（固型分
として）48部、小麦デンプン120部、10％酸化デ
ンプン200部に塗液固型分として20％になるよう
に水を加えて混合撹拌し水性分散塗液とした。こ
の水性分散塗液を坪量48ｇ／m2の原紙上に６ｇ／
m2になるようにマイヤーバーを用いて塗布した。 48 parts of para-phenyl-phenol-formalin resin-containing capsules (as solid content) prepared as above, 120 parts of wheat starch, and 200 parts of 10% oxidized starch were added to the coating liquid so that the solid content was 20%. Water was added and mixed and stirred to obtain an aqueous dispersion coating liquid. This aqueous dispersion coating liquid was applied to 6 g/ m2 of base paper with a basis weight of 48 g/m2.
It was applied using a Mayer bar so that the area was 2 m2.
得られた秘密文書作成用転写シートをその塗布
面をエンボスした普量紙に対向して重ね、転写シ
ートの非塗布面上よりボールペンを用いて印字し
た。印字後、エンボスした普通紙上の転写部は、
印字像を識別することができなかつた。続いて、
転写部に青系無色染料を溶剤に溶解、フロンガス
と共にボンベ内におさめた所謂、感圧紙用減液イ
ンキの為に利用されている減感チエツカー（商品
名三菱NCR用減感チエツカー、三菱製紙(株)製）
を噴霧させたところ青発色の鮮明な印字像を識別
することができた。 The obtained transfer sheet for creating secret documents was stacked with the coated side facing the embossed plain paper, and printing was performed on the non-coated side of the transfer sheet using a ballpoint pen. After printing, the transfer area on the embossed plain paper is
The printed image could not be identified. continue,
A desensitizing checker (product name: Mitsubishi NCR desensitizing checker, Mitsubishi Paper Mills) is used for so-called pressure-sensitive paper reducing liquid ink, in which a blue-based colorless dye is dissolved in a solvent and stored in a cylinder together with chlorofluorocarbon gas in the transfer area. Co., Ltd.)
When sprayed, a clear printed image with a blue color could be discerned.
Claims (1)
料を不揮発性溶媒に溶解又は分散したものを芯物
質とするマイクロカプセルを支持体の裏面に印刷
又は塗布してなる普通紙転写記録層を持つ秘密文
書作成用シートと普通紙を重ねて押圧することに
より、普通紙面に転写された電子受容性の顕色剤
又は電子供与性の無色染料からなる潜像を得る秘
密文書作成方法。1. A plain paper transfer recording layer comprising microcapsules whose core material is an electron-accepting color developer or an electron-donating colorless dye dissolved or dispersed in a non-volatile solvent, printed or coated on the back side of a support. A method for creating a secret document in which a latent image made of an electron-accepting color developer or an electron-donating colorless dye is transferred onto the surface of the plain paper by stacking and pressing a sheet for producing a secret document and plain paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57092155A JPS58209588A (en) | 1982-06-01 | 1982-06-01 | Transfer sheet for preparation of secret document |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57092155A JPS58209588A (en) | 1982-06-01 | 1982-06-01 | Transfer sheet for preparation of secret document |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58209588A JPS58209588A (en) | 1983-12-06 |
| JPH0348038B2 true JPH0348038B2 (en) | 1991-07-23 |
Family
ID=14046529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57092155A Granted JPS58209588A (en) | 1982-06-01 | 1982-06-01 | Transfer sheet for preparation of secret document |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58209588A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1275363B (en) * | 1994-07-21 | 1997-08-05 | Alagao Ag | PROCEDURE FOR THE ANTI-COUNTERFEIT PROTECTION OF DOCUMENTS MADE ON PAPER SUPPORTS OR OTHER OPPORTUNITIES |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5468307A (en) * | 1977-11-11 | 1979-06-01 | Mitsubishi Paper Mills Ltd | Selffcoupling pressureesensitive recording paper |
| JPS54159008A (en) * | 1978-06-01 | 1979-12-15 | Naigai Ink Mfg Co Ltd | Pressureesensitive copying paper |
| JPS5653089A (en) * | 1979-10-08 | 1981-05-12 | Godo Insatsu Kk | Method of expressing letters or picture on paper and other base sheets |
| JPS5731589A (en) * | 1980-08-01 | 1982-02-20 | Mitsubishi Paper Mills Ltd | Pressure-sensitive copying paper |
| JPS5743895A (en) * | 1980-08-28 | 1982-03-12 | Mitsubishi Paper Mills Ltd | Pressure-sensitive copying paper |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54149302U (en) * | 1978-04-07 | 1979-10-17 | ||
| JPS5655666U (en) * | 1979-10-06 | 1981-05-14 |
-
1982
- 1982-06-01 JP JP57092155A patent/JPS58209588A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5468307A (en) * | 1977-11-11 | 1979-06-01 | Mitsubishi Paper Mills Ltd | Selffcoupling pressureesensitive recording paper |
| JPS54159008A (en) * | 1978-06-01 | 1979-12-15 | Naigai Ink Mfg Co Ltd | Pressureesensitive copying paper |
| JPS5653089A (en) * | 1979-10-08 | 1981-05-12 | Godo Insatsu Kk | Method of expressing letters or picture on paper and other base sheets |
| JPS5731589A (en) * | 1980-08-01 | 1982-02-20 | Mitsubishi Paper Mills Ltd | Pressure-sensitive copying paper |
| JPS5743895A (en) * | 1980-08-28 | 1982-03-12 | Mitsubishi Paper Mills Ltd | Pressure-sensitive copying paper |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58209588A (en) | 1983-12-06 |
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