JP5042488B2 - Printer paper - Google Patents
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- JP5042488B2 JP5042488B2 JP2005342455A JP2005342455A JP5042488B2 JP 5042488 B2 JP5042488 B2 JP 5042488B2 JP 2005342455 A JP2005342455 A JP 2005342455A JP 2005342455 A JP2005342455 A JP 2005342455A JP 5042488 B2 JP5042488 B2 JP 5042488B2
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- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Description
本発明は、表裏の区別を要するプリンタ用紙に関し、特に、用紙の裏を認識できる標識を有し、用紙使用後にその認識標識が消滅するプリンタ用紙に関する。 The present invention relates to printer paper that requires distinction between the front and back sides, and more particularly, to a printer paper that has a sign that can recognize the back of the paper and that disappears after the paper is used.
デジタルカメラの画質の向上、パーソナルコンピュータの普及とあわせてインクジェットプリンタの画質向上により、銀塩写真に変わってデジタルカメラで撮影した画像を、自宅のパーソナルコンピュータで加工し、インクジェットプリンタで印刷することがここ数年急速に普及している。インクジェットプリンタ画質向上のため、ノズル、インク、用紙それぞれの改善がなされている。 By improving the image quality of digital cameras and improving the image quality of inkjet printers in conjunction with the spread of personal computers, images taken with digital cameras instead of silver halide photographs can be processed with personal computers at home and printed with inkjet printers. It has become very popular in recent years. In order to improve the image quality of inkjet printers, improvements have been made in nozzles, ink, and paper.
インクジェットプリンタを写真の印刷に用いる場合、銀塩写真なみの画質を出すにはインクジェットプリンタ専用用紙を用いるのが、高画質の写真画像を求めるためには必要である。インクジェットプリンタ専用用紙は、インクを滲ませない、カールを防ぐためなどさまざまな工夫を要し、またこの用紙に光沢のある表面に加工する方法等が提案されている（例えば特許文献１参照）。 When an inkjet printer is used for printing a photograph, it is necessary to use a sheet dedicated to the inkjet printer in order to obtain an image quality similar to that of a silver salt photograph in order to obtain a high-quality photographic image. Inkjet printer paper requires various devices such as preventing ink from bleeding and preventing curling, and a method of processing this paper into a glossy surface has been proposed (see, for example, Patent Document 1).
また、紙搬送時の摩擦軽減などの目的でバック層も形成されている発明も知られており（例えば特許文献２参照）、裏面も光沢を有している。そのため、よくよく注意しないと表裏の区別がつきづらく、間違って専用用紙の裏面に印刷をしてしまうという問題点がある。 In addition, an invention in which a back layer is formed for the purpose of reducing friction during paper conveyance is also known (see, for example, Patent Document 2), and the back surface is also glossy. For this reason, it is difficult to distinguish between the front and the back unless care is taken carefully, and there is a problem that printing is performed on the back side of the dedicated paper by mistake.
そこでインクジェット用紙を作成する場合、ユーザに不快感を与えないように裏面に薄い灰色で社名などを印刷しておくなどの手段が講じられているが、ユーザがその印刷文字を識別できるように十分な濃度がないと表裏が分からなくなり、またその印刷文字の濃度が濃すぎると、ユーザに不快感を与えてしまう虞もある。また、ユーザの視力には大きな個人差があり、全てのユーザの個人差をカバーできるような印刷をすることは実質的に不可能であると言っても過言ではない。
本発明は、上述した実情を考慮してなされたもので、上記の従来技術の問題を踏まえ、ユーザがインクジェットプリンタ用紙の表と裏をはっきり認識できる十分な濃度で裏面を表すような文字、絵柄あるいは色層を裏面に形成し、且つ、ユーザが表裏を識別するに十分な時間が経った後に、識別文字あるいは絵柄の消色が行うことが可能なプリンタ用紙を提供することを目的とする。 The present invention has been made in consideration of the above-described circumstances, and based on the above-described problems of the prior art, characters and pictures that represent the back side with a sufficient density that allows the user to clearly recognize the front and back of the inkjet printer paper. Alternatively, an object of the present invention is to provide a printer paper on which a color layer is formed on the back surface and the identification character or the pattern can be erased after a sufficient time for the user to identify the front and back surfaces.
かかる目的を達成するために、請求項１記載の発明は、印刷がされない裏面に、第１の外部刺激により発色し、且つ前記第１の外部刺激とは異なる第２の外部刺激により消色する発色／消色層を設け、前記発色／消色層に用紙の裏面を識別できる標識を前記第１の外部刺激により発色させて形成し、可視光を透過しないケースに梱包されていることを特徴とするプリンタ用紙。
In order to achieve this object, the invention according to claim 1 is characterized in that a color is developed by the first external stimulus on the back side where printing is not performed, and the color is erased by a second external stimulus different from the first external stimulus. A coloring / decoloring layer is provided, and a label capable of identifying the back side of the paper is formed on the coloring / decoloring layer by coloring by the first external stimulus, and is packed in a case that does not transmit visible light. And printer paper.
請求項２記載の発明は、請求項１記載の発明において、前記第１外部刺激及び前記第２の外部刺激は、それぞれ光照射であることを特徴とする。
According to a second aspect of the invention, in the first aspect of the invention, the first external stimulus and the second external stimulus are each light irradiation.
請求項３記載の発明は、請求項２記載の発明において、前記第１の外部刺激は紫外線照射であり、前記第２の外部刺激は可視光照射であることを特徴とする。
According to a third aspect of the present invention, in the second aspect of the invention, the first external stimulus is ultraviolet irradiation, and the second external stimulus is visible light irradiation .
請求項４記載の発明は、請求項１乃至３のいずれか１項に記載の発明において、前記発色／消色層は、フォトクロミック化合物を含むことを特徴とする。
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the color developing / decoloring layer includes a photochromic compound .
本発明によれば、裏面に光照射により変色する発消色層が形成されていることを特徴とするプリンタ用紙により、ユーザがプリンタ用紙をケースから取り出した時点では、裏面にはっきりと裏面を表す文字あるいは絵柄が形成されているため、誤って裏面に印刷することがないためコストパフォーマンス性およびユーザフレンドリーに富み、また、ユーザが印刷を終えた後、裏面の文字あるいは絵柄が特段の処置を施すことなく消去されているので、ユーザに特別消色作業することなく、ユーザの通常の作業内容がそのまま消色作業に結びつくため、ユーザに不快感を与えず表裏を簡単に認識できるインクジェットプリンタ用紙を提供でき、また、表裏を表す文字あるいは絵柄をユーザが使用する前に消えてしまわないプリンタ用紙を提供できる。 According to the present invention, when the user removes the printer paper from the case, the back surface clearly represents the back surface by the printer paper characterized in that the back surface is formed with a color developing / erasing layer that changes color by light irradiation. Since characters or designs are formed, there is no mistakenly printed on the back side, so it is excellent in cost performance and user friendliness, and after the user finishes printing, the characters or designs on the back side take special measures. Inkjet printer paper that can easily recognize the front and back without causing discomfort to the user because the user's normal work contents are directly linked to the erasing work without special erasing work for the user. It is also possible to provide printer paper that can be provided and does not disappear before the user uses the characters or pictures that represent the front and back. That.
以下、本発明を実施するための最良の形態について添付図面を参照して詳細に説明する。
まず、本発明の実施形態として、インクジェットプリンタ用紙など、裏と表の区別を要する用紙を作成する段階で、裏面にフォトクロミック材料を塗布しておく。そして、図１に示すように、工場でインクジェットプリンタ用紙を裁断、梱包するときに紫外光照射により裏面に裏面を表す文字、あるいは絵柄などを描写（場合によっては全面に発色するようにすることも可能）し、可視光を遮断する袋や箱に入れて出荷する。ユーザが梱包袋あるいは箱からインクジェットプリンタ用紙を取り出し、印刷を終えるまでの時間として、たとえば数時間あれば十分であるため使用するフォトクロミック材料としては消色速度の速い材料を選択することが好ましいが特に限定されない。また文字や絵柄等を形成する色は限定されず、公知のフォトクロミック材料を適宜選択すればよく、基本的にはどのフォトクロミック材料でも使用できる。なお、フォトクロミック材料ではなく、熱クロミック材料などでも場合によっては使用可能である。すなわち、ある所定の条件の外部の刺激が印加すれば発色し、また、それとは異なる外部条件の印加によって消色するような色素材料であってもよい。本発明では、消色の際に、光照射により消色する（あるいは退色する）、たとえば可視光で消色するような色素材料が好ましい。
The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.
First, as an embodiment of the present invention, a photochromic material is applied to the back surface at the stage of creating a paper that requires distinction between the back and the front, such as an inkjet printer paper. Then, as shown in FIG. 1, when cutting and packing ink jet printer paper at a factory, letters or designs representing the back side are drawn on the back side by irradiation with ultraviolet light (in some cases, the entire surface may be colored). Possible) and shipped in bags or boxes that block visible light. It is preferable to select a material having a high decoloring speed as the photochromic material to be used, for example, several hours are sufficient for the user to take out the inkjet printer paper from the packing bag or box and finish printing. It is not limited. Moreover, the color which forms a character, a picture, etc. is not limited, What is necessary is just to select a well-known photochromic material suitably, and basically any photochromic material can be used. Note that not a photochromic material but a thermochromic material can be used in some cases. That is, it may be a dye material that develops color when an external stimulus under a certain predetermined condition is applied, and decolors when an external condition different from that is applied. In the present invention, it is preferable to use a coloring material that is decolored (or fades) when irradiated with light, for example, is decolored with visible light.
特に可視光で消色するためユーザが袋から取り出した初期は、はっきりと裏面を表す文字あるいは絵柄が形成されていても、ユーザがインクジェットプリンタ用紙を使用する環境下ではユーザが特段の処置をせずに、単に可視光が照射されることにより消色がおこなわれることになれば、ユーザに対して手間感を与えることなく、あるいは自動的に消色作業が実行されることとなる。 Especially when the user removes it from the bag in order to erase the color with visible light, even if a character or a picture that clearly shows the back side is formed, the user must take special measures in an environment where the user uses ink jet printer paper. If the erasing is performed simply by irradiating visible light, the erasing operation is automatically performed without giving the user a feeling of trouble.
このような色素材料（色材）として、たとえば２−［１−（５−メチル−２−フェニル−４−オキサゾリル）エチリデン］−３−イソプロピリデンコハク酸無水物、２−［１−（２、５−ジメチル−３−フリル）エチリデン］−３−アダマンチリデンコハク酸無水物、２−［１−（５−メチル−２−ｐ−ピリジル−４−オキサゾリル）エチリデン］−３−イソプロピリデンコハク酸無水物、２−［１−（２、５−ジメチル−３−チエニル）エチリデン］−３−イソプロピリデンコハク酸無水物などのフォトクロミック材料などが挙げられる。なお本発明では、紫外線照射により発色／消色層にフォトクロミック材料を用いた場合、この層の発色波長でもそのλMAXに影響して発色／消色層の厚さが決定される傾向があるが、例えばこの層は数μｍ以下の厚さでよく、他方、最小の厚さは、発色した際に認識できる色相を有する厚さにすればよい。また発色／消色層中の色材の濃度は発色したときに識別できる程度が最低濃度であり、これは色材により異なり、また最高濃度は、発色後に可逆的に発色が消える範囲の濃度とすることによって決定できる。 Examples of such a pigment material (coloring material) include 2- [1- (5-methyl-2-phenyl-4-oxazolyl) ethylidene] -3-isopropylidene succinic anhydride, 2- [1- (2, 5-dimethyl-3-furyl) ethylidene] -3-adamantylidene succinic anhydride, 2- [1- (5-methyl-2-p-pyridyl-4-oxazolyl) ethylidene] -3-isopropylidene succinic acid And photochromic materials such as anhydride and 2- [1- (2,5-dimethyl-3-thienyl) ethylidene] -3-isopropylidene succinic anhydride. In the present invention, when a photochromic material is used for the coloring / decoloring layer by ultraviolet irradiation, the thickness of the coloring / decoloring layer tends to be determined by affecting the λ MAX even at the coloring wavelength of this layer. For example, this layer may have a thickness of several μm or less, and the minimum thickness may be a thickness having a hue that can be recognized when color is developed. The density of the color material in the color developing / decoloring layer is the lowest density that can be discriminated when color is developed. This is different depending on the color material, and the maximum density is a density within a range where color development disappears reversibly after color development. Can be determined by
以下、本発明のプリンタ用紙を、実施例により、さらに詳説するが、本発明は下記実施例に拘束されて解釈されず、本明細書等に開示あるいは示唆した範囲で解釈されるべきものであることは、言を待たない。 Hereinafter, the printer paper of the present invention will be described in more detail with reference to examples. However, the present invention should not be construed as being bound by the following examples, but should be construed within the scope disclosed or suggested in this specification and the like. That does not wait for words.
本実施例のプリンタ用紙として、市販のインクジェットプリンタ用紙(エプソン社製スーパーファイン紙KA4250NSF)を使用した。
ポリスチレン100重量部に対し２−［１−（２、５−ジメチル−３−フリル）エチリデン］−３−アダマンチリデンコハク酸無水物を10重量部添加し、トルエンに溶解させて塗布液を調製した。
インクジェットプリンタ（エプソン社製PM790-TM）を用いて上記インクジェットプリンタ用紙の裏面に「RICOH」という文字を印字した。このインクジェットプリンタ用紙上の発色／消色層の厚さは1μmであった。RICOHと印刷された裏面に光源としてブラックライト（紫外光源）を照射し、文字が明確に認識できる事を確認し、遮光部材で作成したケースに封入し一日放置した。一日放置後上記インクジェットプリンタ用紙を取り出し裏面に印刷された文字がはっきり認識でき、図１に示すように、表裏の区別が出来る事を確認した。
さらにその裏面に蛍光灯７００ｌｘ（７００ルクス）下の光線を2時間照射したところ、図１に示すように、裏面の文字が無色透明になっている事を確認した。
Commercially available inkjet printer paper (Super Fine Paper KA4250NSF manufactured by Epson) was used as the printer paper of this example.
10 parts by weight of 2- [1- (2,5-dimethyl-3-furyl) ethylidene] -3-adamantylidene succinic anhydride is added to 100 parts by weight of polystyrene, and dissolved in toluene to prepare a coating solution. did.
The letter “RICOH” was printed on the back side of the inkjet printer paper using an inkjet printer (Epson PM790-TM). The thickness of the color developing / decoloring layer on this ink jet printer paper was 1 μm. The back side printed with RICOH was irradiated with black light (ultraviolet light source) as a light source, and it was confirmed that the characters could be clearly recognized. After being left for a day, the inkjet printer paper was taken out and the characters printed on the back side could be clearly recognized, and it was confirmed that the front and back sides could be distinguished as shown in FIG.
Furthermore, when the back surface was irradiated with light under fluorescent lamp 700 lx (700 lux) for 2 hours, it was confirmed that the characters on the back surface were colorless and transparent as shown in FIG.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005342455A JP5042488B2 (en) | 2005-11-28 | 2005-11-28 | Printer paper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005342455A JP5042488B2 (en) | 2005-11-28 | 2005-11-28 | Printer paper |
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| JP2007146324A JP2007146324A (en) | 2007-06-14 |
| JP5042488B2 true JP5042488B2 (en) | 2012-10-03 |
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| JP2005342455A Expired - Fee Related JP5042488B2 (en) | 2005-11-28 | 2005-11-28 | Printer paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5297740A (en) * | 1976-02-12 | 1977-08-16 | Kyodo Printing Co Ltd | Format and printed matter difficultly capable of duplication |
| JPH0426331Y2 (en) * | 1989-07-28 | 1992-06-24 | ||
| JP3105304B2 (en) * | 1991-09-12 | 2000-10-30 | 富士通アイソテック株式会社 | Inkjet printer |
| JP2919220B2 (en) * | 1993-03-01 | 1999-07-12 | 出光興産株式会社 | Copy paper |
| JPH0930073A (en) * | 1995-07-20 | 1997-02-04 | Fujitsu Ltd | Record medium and printing device |
| JPH11116565A (en) * | 1997-10-03 | 1999-04-27 | Fuji Photo Film Co Ltd | Photochromic compound, photochromic liquid composition, photochromic sheet and camera |
| JP4289746B2 (en) * | 1998-11-20 | 2009-07-01 | キヤノン株式会社 | Recording medium and image forming method using the recording medium |
| JP2002321439A (en) * | 2001-04-23 | 2002-11-05 | Seiko Epson Corp | Ink jet recording medium and ink jet recording device |
| JP4294350B2 (en) * | 2003-03-19 | 2009-07-08 | パイロットインキ株式会社 | Method of tautomatic expression of photochromic function of image color memory |
| JP2005288973A (en) * | 2004-04-02 | 2005-10-20 | Ricoh Co Ltd | Recording medium and usage thereof |
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