JPH018386Y2 - - Google Patents
Info
- Publication number
- JPH018386Y2 JPH018386Y2 JP501684U JP501684U JPH018386Y2 JP H018386 Y2 JPH018386 Y2 JP H018386Y2 JP 501684 U JP501684 U JP 501684U JP 501684 U JP501684 U JP 501684U JP H018386 Y2 JPH018386 Y2 JP H018386Y2
- Authority
- JP
- Japan
- Prior art keywords
- color change
- change point
- printed
- weight
- printed matter
- 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
Links
- 239000003086 colorant Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000002845 discoloration Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000003094 microcapsule Substances 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 2
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 235000021360 Myristic acid Nutrition 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229940043348 myristyl alcohol Drugs 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Description
本考案はコピー防止用印刷物に関し、詳細には
ゼログラフイーやエレクトロフアツクス等の電子
写真法による複写機ではコピーのとれない印刷物
に関する。
近年ゼログラフイーやエレクトロフアツクス等
の電子写真法による複写機の発展は著しく、だれ
もが簡単に書籍や書類から大量のコピーをとるこ
とができるようになつた。これに伴つて，著作者
の権利が守られない様な事態が頻発しており、前
記のタイプの複写機でコピーのとれない印刷物が
要望されている。
ゼログラフイーやエレクトロフアツクス等の電
子写真法による複写機では複写プロセスの初めの
露光時に発散される熱により被複写体（原本）の
表面の温度が上昇する。この表面温度は複写機の
機種、置かれている環境温度及び使用始めと連続
使用後によつて異なるが、最低でもほぼ30℃に達
し、連続使用後ではほぼ40℃にも達することが確
認された。
本考案は約30℃未満の温度では通常の印刷物の
外観を呈しているが、ゼログラフイーやエレクト
ロフアツクス等の電子写真法による複写機でこの
印刷物のコピーをとろうとする場合、複写の最初
のプロセスの露光時に発散される熱により印刷像
が消色して以後の複写プロセスを経てもコピーは
生成されず、放冷により再びもとの印刷像が複元
する印刷物を提供するものである。
本考案の印刷物は紙、合成紙またはプラスチツ
クフイルム等のシート基材に、約30℃の変色点を
示し、前記変色点未満の温度では着色状態である
が、前記変色点を越える温度では実質的に無色と
なる可逆性熱変色材料からなる着色剤をビヒクル
中に分散するかまたは前記着色剤を周知のカプセ
ル化法により微小カプセルに内包させた着色剤を
ビヒクル中に分散したインクによる印刷像が担持
されてなる。前記ビヒクルは適用される印刷法例
えばグラビア印刷、フレキソ印刷、オフセツト印
刷及びスクリーン印刷等に適用するビヒクルが用
いられる。
このようなタイプの印刷インクとしては本出願
人が先に提案した可逆性熱変色材料を着色剤とし
て用いる印刷インク（特公昭52−7764号）が好適
に用いられる。
しかしながら、上記のとおり約30℃の変色点を
有し、変色点未満の温度では着色状態、変色点を
越す温度では無色になるという条件を満たすもの
に限定されることはいうまでもない。
以下具体例について説明する。
ロイコ染料１重量部、ビスフエノールA1重量
部及びミリスチン酸10重量部からなる均質溶融組
成物を内装する、粒径１乃至5μmのエポキシ樹脂
壁膜微小カプセルを着色剤とした。この着色剤は
以下のとおりロイコ染料の種類によつて呈色時の
色は異なるが、28℃の変色点を示し、変色点未満
の温度では着色状態を呈し、変色点を越える温度
では実質的に無色となる。
The present invention relates to copy-preventing printed matter, and more particularly to printed matter that cannot be copied by electrophotographic copying machines such as xerography and electrofax. In recent years, electrophotographic copying machines such as xerography and electrofaxing have made remarkable progress, and anyone can now easily make large quantities of copies from books and documents. Along with this, situations are frequently occurring in which the rights of authors are not protected, and there is a demand for printed matter that cannot be copied with the above-mentioned type of copying machine. In copying machines using electrophotography such as xerography and electrofax, the temperature of the surface of the object to be copied (original document) increases due to the heat released during exposure at the beginning of the copying process. This surface temperature varies depending on the model of the copying machine, the environmental temperature in which it is placed, and the initial and continuous use, but it has been confirmed that it reaches a minimum of approximately 30°C, and reaches approximately 40°C after continuous use. . Although the present invention has the appearance of a normal printed matter at temperatures below about 30°C, when copying this printed matter with an electrophotographic copying machine such as xerography or electrofax, the The printed image is discolored by the heat dissipated during exposure in the process, and no copy is produced even after the subsequent copying process, and the original printed image is reproduced again when left to cool. . The printed matter of the present invention exhibits a discoloration point of approximately 30°C on a sheet substrate such as paper, synthetic paper, or plastic film, and is colored at temperatures below the discoloration point, but becomes substantially colored at temperatures exceeding the discoloration point. A printed image is produced using an ink in which a colorant made of a reversible thermochromic material that becomes colorless is dispersed in a vehicle, or a colorant in which the colorant is encapsulated in microcapsules by a well-known encapsulation method is dispersed in a vehicle. It becomes carried. The vehicle used is a vehicle applicable to applicable printing methods such as gravure printing, flexographic printing, offset printing, and screen printing. As such a type of printing ink, a printing ink using a reversible thermochromic material as a coloring agent (Japanese Patent Publication No. 7764/1983) previously proposed by the present applicant is suitably used. However, as mentioned above, it is of course limited to those that satisfy the condition of having a discoloration point of about 30° C. and being colored at a temperature below the discoloration point and becoming colorless at a temperature exceeding the discoloration point. A specific example will be explained below. The coloring agent was an epoxy resin-walled microcapsule with a particle size of 1 to 5 μm, which contained a homogeneous molten composition consisting of 1 part by weight of leuco dye, 1 part by weight of bisphenol A, and 10 parts by weight of myristic acid. The color of this coloring agent differs depending on the type of leuco dye as shown below, but it has a color change point of 28℃, and at temperatures below the color change point, it becomes colored, and at temperatures above the color change point, it becomes virtually invisible. becomes colorless.
【表】
前記着色剤20重量部を水性グラビア印刷インク
ビヒクル70重量部中に分散して得たインクを用
い、上質紙に８及び９ポイントの文字からなる文
をグラビアヤ印刷した。この印刷物は常温（20〜
25℃）では通常の非変色インクで印刷された印刷
物と変るところなく、実用上何の支障もなく読取
れるが、電子写真方式の複写機（リコピー
FT6300R、ゼロツクス2300）では印字の色種に
かかわりなくコピーがとれず、コピー防止の機能
が発揮された。
次の例ではロイコ染料A1重量部、ｐ−オキシ
安息香酸オクチル２重量部及びミリスチルアルコ
ール10重量部からなる均質溶融組成物を内包した
粒径２〜8μmのエポキシ樹脂壁膜の微小カプセル
を着色剤とした。この着色剤は30℃の変色点を示
し、変色点未満の温度では黒色に呈色し、変色点
を越える温度では実質的に無色となる。この着色
剤20重量部を水性スクリーン印刷インキビヒクル
80重量部中に分散して得たインクによりスクリー
ン版を用いて上質紙に筆記具の断面図を印刷し
た。この印刷物は常温（20〜25℃）では普通の印
刷物と外観は全く変りなく、実用上も何の支障も
ないが、電子写真方式の複写機（リコピー
FT6300R、ゼロツクス2300）ではコピーがとれ
ず、コピー防止の機能を発揮した。[Table] Sentences consisting of 8 and 9 point characters were gravure printed on high quality paper using an ink obtained by dispersing 20 parts by weight of the above colorant in 70 parts by weight of an aqueous gravure printing ink vehicle. This printed material is kept at room temperature (20~
(25℃), it is no different from printed matter printed with ordinary non-color-changing ink, and can be read without any practical problems.
FT6300R, Xerox 2300) could not be copied regardless of the color of the print, demonstrating the copy prevention function. In the following example, microcapsules of epoxy resin wall with a particle size of 2 to 8 μm containing a homogeneous molten composition consisting of 1 part by weight of leuco dye A, 2 parts by weight of octyl p-oxybenzoate, and 10 parts by weight of myristyl alcohol are used as a coloring agent. And so. This colorant exhibits a color change point of 30° C.; it turns black at temperatures below the color change point, and becomes substantially colorless at temperatures above the color change point. Add 20 parts by weight of this colorant to an aqueous screen printing ink vehicle.
A cross-sectional view of the writing instrument was printed on high-quality paper using a screen plate using the ink obtained by dispersing it in 80 parts by weight. At room temperature (20 to 25 degrees Celsius), this printed matter looks no different from ordinary printed matter and poses no problem in practical use, but it is
FT6300R, Xerox 2300) were unable to make copies, demonstrating the copy prevention function.
第１図は本考案の印刷物の一部の拡大断面図で
ある。
１……シート基材、２……印刷像、３……熱変
色材料内包微小カプセル。
FIG. 1 is an enlarged sectional view of a part of the printed matter of the present invention. 1... Sheet base material, 2... Printed image, 3... Microcapsules containing thermochromic material.
Claims (1)
は着色状態を呈し、該変色点を越える温度では実
質的に無色となる可逆性熱変色材料のみを着色剤
として含むインクによる像がシート基材に印刷さ
れてなるコピー防止用印刷物。 An image is created using an ink containing only a reversible thermochromic material as a coloring agent, which has a color change point of about 30°C and exhibits a colored state at a temperature below the color change point, and becomes substantially colorless at a temperature exceeding the color change point. A copy-prevention printed material printed on a sheet base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP501684U JPS60117183U (en) | 1984-01-18 | 1984-01-18 | Copy prevention printed matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP501684U JPS60117183U (en) | 1984-01-18 | 1984-01-18 | Copy prevention printed matter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60117183U JPS60117183U (en) | 1985-08-08 |
| JPH018386Y2 true JPH018386Y2 (en) | 1989-03-06 |
Family
ID=30481143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP501684U Granted JPS60117183U (en) | 1984-01-18 | 1984-01-18 | Copy prevention printed matter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60117183U (en) |
-
1984
- 1984-01-18 JP JP501684U patent/JPS60117183U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60117183U (en) | 1985-08-08 |
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