JP6738638B2 - Water discoloring cursive body and water discoloring cursive body set using the same - Google Patents

Water discoloring cursive body and water discoloring cursive body set using the same Download PDF

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JP6738638B2
JP6738638B2 JP2016077705A JP2016077705A JP6738638B2 JP 6738638 B2 JP6738638 B2 JP 6738638B2 JP 2016077705 A JP2016077705 A JP 2016077705A JP 2016077705 A JP2016077705 A JP 2016077705A JP 6738638 B2 JP6738638 B2 JP 6738638B2
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中島　明雄
明雄 中島
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Pilot Ink Co Ltd
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Description

本発明は水付着具の適用により筆跡等の像を現出させるよう構成した水変色性被筆記体及びそれを用いた水変色性被筆記体セットに関する。 TECHNICAL FIELD The present invention relates to a water-discoloring writing material and a water-discoloring writing material set using the same, which are configured to show an image such as a handwriting by applying a water-adhering tool.

従来、支持体上に低屈折率顔料をバインダー樹脂に分散状態に固着させた、吸液状態と非吸液状態で透明性が異なる多孔質層を設けた水変色性被筆記体が開示されている（例えば、特許文献１参照）。
前記水変色性被筆記体は、多孔質層が乾燥状態（非吸液状態）においては下層が隠蔽され、多孔質層に水等の液体を吸液させると透明化して下層の色による像を現出させることができるとしても、乾燥状態で視認される多孔質層は質感に乏しいと共に、吸液時に多孔質層に付着した汚れや、層中の成分が像の一部に偏在し易くなり、乾燥状態で汚れや、層中の成分によるシミが目立つことがあった。 Conventionally, a water-discoloring writing material is disclosed in which a low refractive index pigment is fixed to a binder resin in a dispersed state on a support, and a porous layer having different transparency in a liquid absorbing state and a non-liquid absorbing state is provided. (For example, see Patent Document 1).
In the water discolorable writing medium, the lower layer is hidden when the porous layer is in a dry state (non-absorption state), and when the porous layer absorbs a liquid such as water, it becomes transparent and an image in the color of the lower layer is formed. Even if it can be made visible, the porous layer visible in a dry state has poor texture, and stains adhered to the porous layer at the time of absorbing liquid and components in the layer are likely to be unevenly distributed in a part of the image. However, stains and stains due to the components in the layer were sometimes noticeable in the dry state.

特公昭５２−４４１０３号公報Japanese Patent Publication No. 52-44103

本発明は、前記水変色性被筆記体の不具合を解消しようとするものであって、乾燥状態における質感を向上させると共に、水付着具の適用により筆跡等の明瞭な像を繰り返し現出させることができ、しかも、シミが目立つことのない水変色性被筆記体及びそれを用いた水変色性被筆記体セットを提供しようとするものである。 The present invention is intended to solve the problems of the water discolorable writing material, improve the texture in a dry state, and repeatedly show a clear image such as handwriting by applying a water adhesion tool. The present invention is intended to provide a water-discoloring writing material and a water-discoloring writing material set using the same, in which stains are not noticeable.

本発明は、着色支持体上に、低屈折率顔料をバインダー樹脂に分散状態に固着させた、吸液状態と非吸液状態で透明性が異なる連続した多孔質像と、前記多孔質像を部分的に覆う非変色性着色像を多孔質像上の全面に亘って設けてなり、前記多孔質像中に非変色性着色剤を含有してなり、前記多孔質像が吸液状態で視認される着色支持体の色と非変色性着色剤の色が混色となった色と、非変色性着色像の色が同一又は同系色であることを特徴とする水変色性被筆記体を要件とする。
更には、前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）が４５以下であり、且つ、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）が１０以上であること、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比が１ｃｍ２あたり１：９９〜３０：７０であること、前記着色支持体が基材上に着色層を設けた支持体であること、前記着色支持体が可撓性を有する支持体であること、前記可撓性を有する支持体が合成樹脂又は布帛であること、前記多孔質像の面積が０．５ｍ２以上であり、多孔質像の最短径が０．５ｍ以上であること等を要件とする。
更には、水変色性被筆記体と水付着具とからなる水変色性被筆記体セットを要件とする。 The present invention, on a colored support, a low refractive index pigment fixed to a binder resin in a dispersed state, a continuous porous image with different transparency in a liquid absorbing state and a non-liquid absorbing state, and the porous image. A non-discoloring colored image that partially covers is provided over the entire surface of the porous image, and the non-discoloring coloring agent is contained in the porous image , and the porous image is visually recognized in a liquid absorbing state. Require a water discolorable writing material characterized in that the color of the colored support and the color of the non-color-changing colorant are mixed and the color of the non-color-changing colored image is the same or similar. And
Furthermore, the color difference (ΔE * ab ) between the color of the porous image visually recognized in the liquid absorbing state and the color of the non-discoloring colored image is 45 or less, and the porous image is visually recognized in the dry state. Color difference (ΔE * ab ) between the color of the non-discoloring colored image and the area where the non-discoloring colored image is formed and the area where the non-discoloring colored image is not formed. The ratio is 1:99 to 30:70 per cm 2 , the colored support is a support provided with a colored layer on a substrate, and the colored support is a flexible support. That the flexible support is a synthetic resin or cloth, the area of the porous image is 0.5 m 2 or more, and the shortest diameter of the porous image is 0.5 m or more. As a requirement.
Furthermore, a water-discoloring writing material set comprising a water-discoloring writing material and a water-adhering tool is required.

本発明は、乾燥状態における質感に富み、水付着具の適用により筆跡等の明瞭な像を繰り返し現出させることができると共に、シミが目立つことのない実用性を有する水変色性被筆記体及びそれを用いた水変色性被筆記体セットを提供することができる。 The present invention is rich in texture in a dry state, can repeatedly reveal a clear image such as a handwriting by applying a water-adhering tool, and a water-discoloring writing material having practicality with no visible stains and It is possible to provide a water discolorable writing system set using the same.

本発明水変色性被筆記体の一参考例を示す説明図である。It is explanatory drawing which shows one reference example of the water discoloration writing material of this invention. 本発明水変色性被筆記体に水付着具を用いて像を現出させた状態を示す説明図である。It is explanatory drawing which shows the state which made the image appear on the water discoloration writing material of this invention using a water attachment tool.

前記着色支持体は着色された基材であれば全て有効であり、例えば、紙、合成紙、織物、編物、組物、不織布等の布帛、天然又は合成皮革、プラスチック、ガラス、陶磁器、金属、木材、石材等が用いられ、可撓性を有する合成樹脂、布帛等の基材が折り曲げ易く実用性に優れる。又、形状としては平面状のものが好ましいが、凹凸状の形態であってもよい。
前記着色支持体は、基材自体が着色されたものであってもよいし、基材上に着色層を設けたものであってもよい。 The colored support is all effective as long as it is a colored substrate, for example, paper, synthetic paper, woven fabric, knitted fabric, braid, non-woven fabric, natural or synthetic leather, plastic, glass, ceramics, metal, Wood, stone, etc. are used, and flexible base materials such as synthetic resin and cloth are easily bendable and excellent in practicality. Further, the shape is preferably flat, but may be uneven.
The colored support may be one in which the base material itself is colored, or one in which a colored layer is provided on the base material.

前記着色支持体上に設けられる多孔質像は、低屈折率顔料をバインダー樹脂と共に分散状態に固着させた像であり、乾燥状態と吸液状態で透明性が異なる像である。
前記低屈折率顔料としては、珪酸及びその塩、バライト粉、硫酸バリウム、炭酸バリウム、炭酸カルシウム、石膏、クレー、タルク、アルミナホワイト、炭酸マグネシウム等が挙げられ、これらは屈折率が１．４〜１．８の範囲にあり、水を吸液すると良好な透明性を示すものである。
なお、前記珪酸の塩としては、珪酸アルミニウム、珪酸アルミニウムカリウム、珪酸アルミニウムナトリウム、珪酸アルミニウムカルシウム、珪酸カリウム、珪酸カルシウム、珪酸カルシウムナトリウム、珪酸ナトリウム、珪酸マグネシウム、珪酸マグネシウムカリウム等が挙げられる。
又、前記低屈折率顔料は２種以上を併用することもできる。
前記低屈折率顔料の粒径は特に限定されるものではないが、０．０３〜１０．０μｍのものが好適に用いられる。
尚、好適に用いられる低屈折率顔料としては珪酸が挙げられる。
前記珪酸は、乾式法により製造させる珪酸であってもよいが、湿式法により製造される珪酸（以下、湿式法珪酸と称する）が特に効果的であり、この点を説明すると、珪酸は非晶質の無定形珪酸として製造され、その製造方法により、四塩化ケイ素等のハロゲン化ケイ素の熱分解等の気相反応を用いる乾式法によるもの（以下、乾式法珪酸と称する）と、ケイ酸ナトリウム等の酸による分解等の液相反応を用いる湿式法によるものとに大別され、乾式法珪酸と湿式法珪酸とでは構造が異なり、前記乾式法珪酸は珪酸が密に結合した三次元構造を形成するのに対して、湿式法珪酸は、珪酸が縮合して長い分子配列を形成した、所謂、二次元構造部分を有している。
従って、前記乾式法珪酸と比較して分子構造が粗になるため、湿式法珪酸を多孔質像に適用した場合、乾式法珪酸を用いる系と比較して乾燥状態における光の乱反射性に優れ、よって、常態での隠蔽性が大きくなるものと推察される。
又、前記多孔質像においては、水を吸液させるものであるから、湿式法珪酸は乾式法珪酸に比べて粒子表面にシラノール基として存在する水酸基が多く、親水性の度合いが大であり、好適に用いられる。
尚、前記多孔質像の常態での隠蔽性と吸液状態での透明性を調整するために、湿式法珪酸と共に、他の汎用の低屈折率顔料を併用することもできる。 The porous image provided on the colored support is an image in which a low-refractive-index pigment is fixed in a dispersed state together with a binder resin, and is an image having different transparency between a dry state and a liquid absorbing state.
Examples of the low refractive index pigment include silicic acid and salts thereof, barite powder, barium sulfate, barium carbonate, calcium carbonate, gypsum, clay, talc, alumina white, magnesium carbonate, and the like, and these have a refractive index of 1.4 to It is in the range of 1.8 and exhibits good transparency when absorbing water.
Examples of the salt of silicic acid include aluminum silicate, aluminum potassium silicate, sodium aluminum silicate, calcium aluminum silicate, potassium silicate, calcium silicate, calcium sodium silicate, sodium silicate, magnesium silicate, magnesium potassium silicate and the like.
Further, two or more kinds of the low refractive index pigments may be used in combination.
The particle size of the low refractive index pigment is not particularly limited, but a particle size of 0.03 to 10.0 μm is preferably used.
In addition, silicic acid is mentioned as a low refractive index pigment used suitably.
The silicic acid may be a silicic acid produced by a dry method, but a silicic acid produced by a wet method (hereinafter referred to as a wet method silicic acid) is particularly effective. To explain this point, the silicic acid is amorphous. Produced as high quality amorphous silicic acid, by the dry method using a gas phase reaction such as thermal decomposition of silicon halide such as silicon tetrachloride (hereinafter referred to as dry method silicic acid) and sodium silicate It is roughly classified into a wet method using a liquid phase reaction such as decomposition with an acid, etc., and the structure is different between dry method silicic acid and wet method silicic acid, and the dry method silicic acid has a three-dimensional structure in which silicic acid is tightly bound. On the other hand, wet-process silicic acid has a so-called two-dimensional structure portion in which silicic acid is condensed to form a long molecular array.
Therefore, since the molecular structure becomes coarser as compared with the dry method silicic acid, when the wet method silicic acid is applied to a porous image, it is excellent in diffused reflection of light in a dry state as compared with a system using the dry method silicic acid, Therefore, it is presumed that the hiding power in the normal state is increased.
Further, in the porous image, since it absorbs water, the wet method silicic acid has more hydroxyl groups present as silanol groups on the particle surface than the dry method silicic acid, and the degree of hydrophilicity is large, It is preferably used.
In addition, in order to adjust the hiding property of the porous image in the normal state and the transparency in the liquid absorbing state, other general-purpose low refractive index pigments may be used together with the wet process silicic acid.

前記多孔質像中の低屈折率顔料は、粒子径、比表面積、吸油量等の性状に左右されるが、常態での隠蔽性と吸液状態での透明性を共に満足するためには、塗布量が１〜３０ｇ／ｍ２であることが好ましく、より好ましくは、５〜２０ｇ／ｍ２である。１ｇ／ｍ２未満では、常態で十分な隠蔽性を得ることが困難であり、又、３０ｇ／ｍ２を越えると吸液時に十分な透明性を得ることが困難である。
前記低屈折率顔料はバインダー樹脂を結合剤として含むビヒクル中に分散され、支持体に塗布した後、揮発分を乾燥させて多孔質像を形成する。
前記バインダー樹脂としては、ウレタン系樹脂、ナイロン樹脂、酢酸ビニル樹脂、アクリル酸エステル樹脂、アクリル酸エステル共重合樹脂、アクリルポリオール樹脂、塩化ビニル−酢酸ビニル共重合樹脂、マレイン酸樹脂、ポリエステル樹脂、スチレン樹脂、スチレン共重合樹脂、ポリエチレン樹脂、ポリカーボネート樹脂、エポキシ樹脂、スチレン−ブタジエン共重合樹脂、アクリロニトリル−ブタジエン共重合樹脂、メタクリル酸メチル−ブタジエン共重合樹脂、ブタジエン樹脂、クロロプレン樹脂、メラミン樹脂、及び前記各樹脂エマルジョン、カゼイン、澱粉、セルロース誘導体、ポリビニルアルコール、尿素樹脂、フェノール樹脂等が挙げられる。
前記低屈折率顔料とこれらのバインダー樹脂の混合比率は、低屈折率顔料の種類及び性状に左右されるが、好ましくは、低屈折率顔料１質量部に対してバインダー樹脂固形分０．５〜２質量部であり、より好ましくは、０．８〜１．５質量部である。低屈折率顔料１質量部に対してバインダー樹脂固形分が０．５質量部未満の場合には、前記多孔質像の実用的な皮膜強度を得ることが困難であり、２質量部を越える場合には、前記多孔質層内部への水の浸透性が悪くなる。
前記多孔質層は、一般的な塗膜と比較して着色剤に対するバインダー樹脂の混合比率が小さいため、十分な皮膜強度が得られ難い。そこで、耐擦過強度を高めるために、前記のバインダー樹脂のうち、ナイロン樹脂又はウレタン系樹脂を用いると効果的である。
前記ウレタン系樹脂としては、ポリエステル系ウレタン樹脂、ポリカーボネート系ウレタン樹脂、ポリエーテル系ウレタン樹脂等があり、２種以上を併用することもできる。又、前記樹脂が水に乳化分散したウレタン系エマルジョン樹脂や、イオン性を有するウレタン樹脂（ウレタンアイオノマー）自体のイオン基により乳化剤を必要とすることなく自己乳化して、水中に溶解乃至分散したコロイド分散型（アイオノマー型）ウレタン樹脂を用いることもできる。
尚、前記ウレタン系樹脂は水性ウレタン系樹脂又は油性ウレタン系樹脂のいずれを用いることもできるが、本発明においては水性ウレタン系樹脂、殊に、ウレタン系エマルジョン樹脂やコロイド分散型ウレタン系樹脂が好適に用いられる。
前記ウレタン系樹脂は単独で用いることもできるが、支持体の種類や皮膜に必要とされる性能に応じて、他のバインダー樹脂を併用することもできる。ウレタン系樹脂以外のバインダー樹脂を併用する場合、実用的な皮膜強度を得るためには、前記多孔質層のバインダー樹脂中にウレタン系樹脂を固形分質量比率で３０％以上含有させることが好ましい。
前記バインダー樹脂において、架橋性のものは任意の架橋剤を添加して架橋させることにより、さらに皮膜強度を向上させることができる。
前記バインダー樹脂には、水との親和性に大小が存在するが、これらを組み合わせることにより、多孔質像中への浸透時間、浸透度合い、浸透後の乾燥の遅速を調整することができる。更には、適宜分散剤や界面活性剤を添加して前記調整をコントロールすることができる。 The low refractive index pigment in the porous image depends on properties such as particle diameter, specific surface area and oil absorption amount, but in order to satisfy both the hiding property in the normal state and the transparency in the liquid absorbing state, preferably the coating amount is 1 to 30 g / m 2, more preferably 5 to 20 g / m 2. If it is less than 1 g/m 2 , it is difficult to obtain sufficient hiding power under normal conditions, and if it exceeds 30 g/m 2 , it is difficult to obtain sufficient transparency when absorbing liquid.
The low refractive index pigment is dispersed in a vehicle containing a binder resin as a binder, coated on a support, and then volatile components are dried to form a porous image.
Examples of the binder resin include urethane resins, nylon resins, vinyl acetate resins, acrylic ester resins, acrylic ester copolymer resins, acrylic polyol resins, vinyl chloride-vinyl acetate copolymer resins, maleic acid resins, polyester resins, styrene. Resin, styrene copolymer resin, polyethylene resin, polycarbonate resin, epoxy resin, styrene-butadiene copolymer resin, acrylonitrile-butadiene copolymer resin, methyl methacrylate-butadiene copolymer resin, butadiene resin, chloroprene resin, melamine resin, and the above. Examples include resin emulsions, casein, starch, cellulose derivatives, polyvinyl alcohol, urea resins, phenol resins and the like.
The mixing ratio of the low-refractive-index pigment and the binder resin depends on the type and properties of the low-refractive-index pigment. 2 parts by mass, and more preferably 0.8 to 1.5 parts by mass. When the binder resin solid content is less than 0.5 parts by mass relative to 1 part by mass of the low refractive index pigment, it is difficult to obtain a practical film strength of the porous image, and when it exceeds 2 parts by mass. In addition, the permeability of water into the porous layer becomes poor.
The porous layer has a small mixing ratio of the binder resin to the colorant as compared with a general coating film, and thus it is difficult to obtain sufficient film strength. Therefore, in order to increase the abrasion resistance, it is effective to use nylon resin or urethane resin among the above binder resins.
Examples of the urethane-based resin include polyester-based urethane resin, polycarbonate-based urethane resin, and polyether-based urethane resin, and two or more kinds of them can be used in combination. Further, a urethane emulsion resin in which the above resin is emulsified and dispersed in water, or a colloid which is self-emulsified by an ionic group of the urethane resin (urethane ionomer) itself having ionicity without the need for an emulsifier and is dissolved or dispersed in water A dispersion type (ionomer type) urethane resin can also be used.
The urethane-based resin may be either an aqueous urethane-based resin or an oil-based urethane-based resin, but in the present invention, an aqueous urethane-based resin, particularly a urethane-based emulsion resin or a colloid-dispersed urethane-based resin is preferable. Used for.
The urethane-based resin may be used alone, or may be used in combination with another binder resin depending on the type of support and the performance required for the film. When a binder resin other than the urethane resin is used in combination, it is preferable that the binder resin of the porous layer contains the urethane resin in a solid content mass ratio of 30% or more in order to obtain practical film strength.
In the binder resin, a crosslinkable resin can be further improved in film strength by adding an arbitrary crosslinking agent to effect crosslinking.
The binder resin has different degrees of affinity with water, but by combining these, the penetration time into the porous image, the degree of penetration, and the slowness of drying after penetration can be adjusted. Furthermore, the above-mentioned adjustment can be controlled by appropriately adding a dispersant or a surfactant.

前記多孔質像は、スクリーン印刷、オフセット印刷、グラビヤ印刷、コーター、タンポ印刷、転写等の印刷手段、刷毛塗り、スプレー塗装、静電塗装、電着塗装、流し塗り、ローラー塗り、浸漬塗装等により着色支持体上に形成される。
前記多孔質像としては、支持体の形状に合わせた円形、楕円形、正方形、長方形等の像であってもよいが、各種文字、記号、図形、模様の他、人、動物、植物、果実、食料品、乗物、建物、天体等の像でもよい。
前記多孔質像の面積が０．５ｍ２以上、好ましくは１．０ｍ２以上、より好ましくは１．０ｍ２以上１００ｍ２以下であり、多孔質像の最短径が０．５ｍ以上、好ましくは０．７５ｍ以上、より好ましくは０．７５ｍ以上１．５ｍ以下であることにより、使用者は伸び伸びと筆記でき、観察者は筆跡を視認し易い比較的大面積の水変色性被筆記体が得られ、壁面やテーブル等に固定して筆記板として用いる構成に適した水変色性被筆記体とすることができる。
なお、前記壁面等に固定する用途に適した水変色性被筆記体の多孔質像の形状は特に限定されるものではないが、長方形や楕円形が好ましい。 The porous image is formed by screen printing, offset printing, gravure printing, coater, tampo printing, printing means such as transfer, brush coating, spray coating, electrostatic coating, electrodeposition coating, flow coating, roller coating, dip coating, etc. It is formed on a colored support.
The porous image may be an image of a circle, an ellipse, a square, a rectangle or the like according to the shape of the support, but various characters, symbols, figures, patterns, humans, animals, plants, fruits, etc. , Food items, vehicles, buildings, celestial bodies, etc.
The area of the porous image 0.5 m 2 or more, preferably 1.0 m 2 or more, more preferably 1.0 m 2 or more 100 m 2 or less, the minimum diameter of the porous image than 0.5 m, preferably 0 Since it is 0.75 m or more, and more preferably 0.75 m or more and 1.5 m or less, the user can write with elongation and elongation, and a relatively large area water-discolorable writing material that allows the observer to easily see the handwriting can be obtained. A water-discoloring writing material suitable for a structure fixed to a wall surface or a table and used as a writing plate can be obtained.
The shape of the porous image of the water-discoloring writing material suitable for fixing to the wall surface or the like is not particularly limited, but a rectangular shape or an elliptical shape is preferable.

前記多孔質像上に設けられる非変色性着色像は、多孔質像上の全面に亘って設けてなり、水変色性被筆記体の質感を高めることができる。
更に、水付着具等の適用により多孔質像及び非変色性着色像に水を付着させると、前記多孔質像は吸液により透明化して着色支持体の色の像を形成することができるが、前記像の色と非変色性着色像の色は同一又は同系色であることにより、像の一部が非変色性着色像を構成していても像は全体として均一な色の像として視認されるため、使用者及び観察者は明瞭な像を視認することができる。
また、多孔質像は、吸液時に付着した汚れや、像中の成分が偏在してシミができることがあるが、非変色性着色像が多孔質像上の全面に亘って設けられているため、シミが目立ち難くなる。
なお、前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）は４５以下、好ましくは４０以下であり、且つ、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）が１０以上、好ましくは２０以上であることにより、乾燥状態における非変色性着色像の視認性を高めて水変色性被筆記体の質感をより高めることができると共に、吸液状態で視認される明瞭な像（着色支持体の色の像と非変色性着色像の一部から構成される像）を視認することができる。
また、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比が１ｃｍ２あたり１：９９〜３０：７０、好ましくは３：９７〜２０：８０であることにより、多孔質像上の全面に亘って適度に設けられて乾燥状態における水変色性被筆記体の質感をより高めることができると共に、吸液状態における明瞭な像を視認することができ、しかも、シミを目立ち難くすることができる。 The non-discoloring colored image provided on the porous image is provided over the entire surface of the porous image, and the texture of the water-discoloring writing material can be enhanced.
Further, when water is attached to the porous image and the non-discoloring colored image by applying a water-adhering tool, the porous image can be made transparent by liquid absorption to form an image of the color of the colored support. , The color of the image and the color of the non-color-changing colored image are the same or similar colors, so that the image is visually recognized as a uniform color image as a whole even if a part of the image constitutes the non-color-changing colored image. Therefore, the user and the observer can visually recognize a clear image.
Further, the porous image may have stains adhering at the time of absorbing liquid or stains due to uneven distribution of components in the image, but since the non-discoloring colored image is provided over the entire surface of the porous image. , Stains are less noticeable.
The color difference (ΔE * ab ) between the color visually recognized in the liquid absorbing state and the color of the non-discoloring colored image is 45 or less, preferably 40 or less, and the porous image is dried. The color difference (ΔE * ab ) between the color visually recognized in the dry state and the color of the non-color-changing colored image is 10 or more, preferably 20 or more, whereby the visibility of the non-color-changing colored image in the dry state is enhanced and water The texture of the discolorable writing material can be further enhanced, and a clear image (image composed of the color image of the colored support and a part of the non-discoloration colored image) visually recognized in the liquid absorbing state can be visually recognized. can do.
Further, the area ratio of the portion where the non-color-changing colored image is formed and the portion where the non-color-changing colored image is not formed is 1:99 to 30:70, preferably 3:97 to 20:80 per cm 2. As a result, the texture of the water-discoloring writing material in a dried state can be more appropriately provided over the entire surface of the porous image, and a clear image can be visually recognized in a liquid absorbing state. Moreover, the stain can be made inconspicuous.

前記非変色性着色像は、非変色性着色剤をビヒクル中に混合して、塗料や印刷インキ等の液状組成物を調製し、多孔質像と同様の手段により形成される。
前記非変色性着色剤としては、汎用の染料、顔料、金属光沢顔料、パール顔料等が挙げられる。
前記非変色性像としては、各種文字、記号、図形、模様の他、人、動物、植物、果実、食料品、乗物、建物、天体等が挙げられる。なお、前記模様は水玉模様等のそれぞれ独立した非連続模様であってもよいし、格子模様等の部分的に連結した連続模様であってもよい。 The non-discoloring colored image is formed by mixing a non-discoloring coloring agent in a vehicle to prepare a liquid composition such as a paint or a printing ink, and using the same means as for the porous image.
Examples of the non-discoloring colorant include general-purpose dyes, pigments, metallic luster pigments and pearl pigments.
Examples of the non-color-changing image include various characters, symbols, figures, and patterns, as well as people, animals, plants, fruits, food products, vehicles, buildings, astronomical objects, and the like. The patterns may be independent and continuous patterns such as polka dots, or may be partially connected continuous patterns such as a lattice pattern.

前記多孔質像に水を付着させる手段としては、手や指を水で濡らして接触させる他、先端部に筆穂や繊維ペン体等を有する筆記又は塗布具により水を塗布させたり、容器内に水を収容し、且つ、容器内の水を導出する繊維体や刷毛を設けた筆記具又は塗布具により水を塗布する水付着具や、スタンプやローラー形態の水付着具を用いることができる。
前記水付着具と、水変色性被筆記体とを組み合わせて水変色性被筆記体セットが得られる。
なお、好ましい水付着具としては、連続気孔を有するプラスチック多孔体又は繊維加工体をペン先部材として適用した筆記具又は塗布具であり、筆記像を簡便に形成でき、実用性を高めることができる。
前記における連続気孔を有するプラスチック多孔体又は繊維加工体は、水を適宜量、吸収し、吐出させるものであればよく、ポリオレフィン系、ポリウレタン系、その他各種プラスチックの連続気孔体や繊維を集束させた毛筆状のもの、繊維の樹脂加工又は熱溶着加工によるもの、フェルト、不織布形態のものを挙げることができ、形状、寸法は目的に応じて任意に設定できる。
筆記具又は塗布具の適用により多孔質像に形成される筆跡幅は、０．３〜３ｃｍ、好ましくは０．５〜２ｃｍ、より好ましくは０．５〜１ｃｍである。
更に、前記水を付着させる筆記具又は塗布具と共に、ステンシルを備えることによって、簡便に像を形成することができる。 As means for adhering water to the porous image, the hand or finger is wetted with water and brought into contact with it, or water is applied by a writing or applicator having a brush tip, a fiber pen body or the like at the tip, or in a container. It is possible to use a water applicator that stores water in the container and applies the water with a writing tool or an applicator that is provided with a fibrous body or a brush for drawing out the water in the container, or a water adhering tool in the form of a stamp or a roller.
The water-discoloring writing material set is obtained by combining the water-adhering tool and the water-discoloring writing material.
The preferable water-adhering tool is a writing tool or an applicator to which a plastic porous body having continuous pores or a fiber-processed body is applied as a pen tip member, and a writing image can be easily formed, and the practicality can be improved.
The plastic porous body or the fiber processed body having continuous pores in the above may be one that absorbs and discharges water in an appropriate amount, and is a continuous pore body or fiber of polyolefin-based, polyurethane-based or other various plastics bundled. Examples thereof include a brush-like one, a resin-treated or heat-welded fiber, a felt, and a non-woven fabric. The shape and dimensions can be arbitrarily set according to the purpose.
The handwriting width formed on the porous image by applying a writing implement or an applicator is 0.3 to 3 cm, preferably 0.5 to 2 cm, and more preferably 0.5 to 1 cm.
Further, an image can be easily formed by providing a stencil together with the writing instrument or the applicator to which the water is attached.

以下に実施例を示すが、本発明は実施例に限定されない。尚、実施例中の部は質量部を示す。
参考例１（図１、２参照）
水変色性被筆記体の作製
支持体として目付量５５ｇ／ｍ２の白色ポリエステルタフタ生地上面に、青色の非変色性インキを用いて１５０メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて着色層を形成して着色支持体２を得た。
前記着色支持体上に、湿式法珪酸〔商品名：ニップシールＥ−２００、日本シリカ工業（株）製〕１５部、ウレタンエマルジョン〔商品名：ハイドランＨＷ−９３０、大日本インキ化学工業（株）製、固形分５０％〕３０部、水４０部、シリコーン系消泡剤０．５部、水系インキ用増粘剤３部、エチレングリコール１部、ブロックイソシアネート系架橋剤３部を均一に混合、攪拌してなる白色スクリーン印刷用インキを用いて、１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて短辺（最短径）の長さが０．７５ｍであり、面積が０．７５ｍ２の長方形状の多孔質像３を形成した。
次いで、前記多孔質像上に、青色の非変色性インキを用いて１５０メッシュのスクリーン版にて水玉模様を印刷し、乾燥させて非変色性着色像４を形成して水変色性被筆記体１を得た。
なお、非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比は、１ｃｍ２あたり１０：９０であった。
前記水変色性被筆記体は、乾燥状態では多孔質像による白地に、非変色性着色像による青色の水玉模様が視認され、多孔質像による白地のみでは得られない質感を有しており、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）をコニカミノルタ製蛍光分光濃度計、品番：ＦＤ−７を用いて測定すると６５．６であった。
前記水変色性被筆記体の多孔質像上に水を充填した筆記具形態の水付着具を適用するとその部分の多孔質像は透明化して、青色の像（筆跡）が現出し、前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）は９．７であって同系色であるため、像の一部が非変色性着色像を構成していても像は全体として均一な色の像として視認され、使用者及び観察者は明瞭な像を視認することができた。
前記多孔質像は、繰り返しの使用により吸液時に付着した汚れや、像中の成分が偏在してシミができても非変色性着色像が多孔質像上の全面に亘って設けられているため、シミが目立ち難いものであった。 Examples will be shown below, but the present invention is not limited to the examples. In addition, the part in an Example shows a mass part.
Reference example 1 (see FIGS. 1 and 2)
Preparation of Water Discolorable Writing Material A solid polyester taffeta material having a basis weight of 55 g/m 2 was solidly printed on the entire surface with a 150-mesh screen plate using a blue non-discoloring ink, and dried on a top surface of a white polyester taffeta material. A colored layer was formed to obtain a colored support 2.
On the colored support, 15 parts of wet-process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.], urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink and Chemicals Co., Ltd.] , Solid content 50%] 30 parts, water 40 parts, silicone-based defoamer 0.5 part, water-based ink thickener 3 parts, ethylene glycol 1 part, blocked isocyanate-based crosslinking agent 3 parts are uniformly mixed and stirred. Using the white screen printing ink obtained as above, solid printing is performed on the entire surface with a screen plate of 100 mesh and dried to have a short side (shortest diameter) of 0.75 m 2 and an area of 0.75 m 2. The rectangular porous image 3 was formed.
Then, a polka dot pattern is printed on the porous image with a screen plate of 150 mesh using a blue non-discoloring ink and dried to form a non-discoloring colored image 4 to form a water-discoloring writing object. Got 1.
The area ratio of the part where the non-discoloring colored image was formed and the part where the non-discoloring colored image was not formed was 10:90 per cm 2 .
The water-discoloring writing material, in a dry state on a white background by a porous image, a blue polka dot pattern by a non-color-changing colored image is visually recognized, and has a texture that cannot be obtained only on a white background by a porous image, The color difference (ΔE * ab ) between the color visually perceived in the dry state of the porous image and the color of the non-discoloring colored image was measured using a Konica Minolta fluorescence spectrodensitometer, product number: FD-7. Met.
When a water-applying tool in the form of a writing tool filled with water is applied to the porous image of the water-discoloring writing object, the porous image in that portion becomes transparent, and a blue image (handwriting) appears, Since the color difference (ΔE * ab ) between the color of the image visually recognized in the liquid absorbing state and the color of the non-color-changing colored image is 9.7, which is a similar color, a part of the image may not change to the non-color-changing colored image. Even with the structure, the image was visually recognized as an image of uniform color as a whole, and the user and the observer could visually recognize the clear image.
The porous image is provided with a non-discoloring colored image over the entire surface of the porous image even if stains adhered when absorbing liquid due to repeated use or stains are generated due to uneven distribution of components in the image. Therefore, the stains were inconspicuous.

参考例２（図２参照）
水変色性被筆記体セットの作製
参考例１の水変色性被筆記体１と、水付着具５として先端部にナイロン樹脂からなる繊維ペン体を有し、軸筒内に水を収容可能に構成した筆記具とを組み合わせて水変色性被筆記体セットを得た。
前記水変色性被筆記体セットは、多孔質像に水を収容した前記筆記具を用いて筆記すると、１．５ｃｍ幅の青色の像（筆跡）が視認される。
更に、多孔質像が乾燥するにつれて青色の像は視認されなくなり、再び多孔質像に水を付着させると青色の像が視認される。 Reference example 2 (see FIG. 2)
Preparation of water discoloration cursive set
Water discoloration by combining the water-discoloring writing object 1 of Reference Example 1 and a writing tool having a fiber pen body made of nylon resin at the tip as the water-adhering tool 5 and configured to be able to store water in the barrel. A sex cursive set was obtained.
When the water-discoloring writing object set is written using the writing instrument in which water is contained in a porous image, a blue image (handwriting) having a width of 1.5 cm is visually recognized.
Furthermore, as the porous image dries, the blue image becomes invisible, and when water is attached again to the porous image, the blue image becomes visible.

参考例３
水変色性被筆記体の作製
支持体として目付量１３０ｇ／ｍ２の白色の合成紙上面に、ピンク色の非変色性インキを用いて１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥硬化させて着色層を形成して着色支持体を得た。
前記着色支持体上に、湿式法珪酸〔商品名：ニップシールＥ−２００、日本シリカ工業（株）製〕１５部、ウレタンエマルジョン〔商品名：ハイドランＨＷ−９３０、大日本インキ化学工業（株）製、固形分５０％〕３０部、水４０部、シリコーン系消泡剤０．５部、水系インキ用増粘剤３部、エチレングリコール１部、ブロックイソシアネート系架橋剤３部を混合した白色スクリーン印刷用インキを用いて、１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて短辺（最短径）の長さが０．８ｍであり、面積が１．０ｍ２の長方形状の多孔質像を形成した。
次いで、前記多孔質像上に、ピンク色の非変色性インキを用いて１００メッシュのスクリーン版にて格子模様を印刷し、乾燥させて非変色性着色像を形成して水変色性被筆記体を得た。
なお、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比は、１ｃｍ２あたり２０：８０であった。
前記水変色性被筆記体は、乾燥状態では多孔質像による白地に、非変色性着色像によるピンク色の格子模様が視認され、多孔質像による白地のみでは得られない質感を有しており、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）をコニカミノルタ製蛍光分光濃度計、品番：ＦＤ−７を用いて測定すると４７．０であった。
前記水変色性被筆記体の多孔質像上に水を充填した筆記具形態の水付着具を適用するとその部分の多孔質像は透明化して、ピンク色の像（筆跡）が現出し、前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）は１４．３であって同系色であるため、像の一部が非変色性着色像を構成していても像は全体として均一な色の像として視認され、使用者及び観察者は明瞭な像を視認することができた。
前記多孔質像は、繰り返しの使用により吸液時に付着した汚れや、像中の成分が偏在してシミができても非変色性着色像が多孔質像上の全面に亘って設けられているため、シミが目立ち難いものであった。 Reference example 3
Manufacture of water-discolorable writing material A solid synthetic paper with a basis weight of 130 g/m 2 was used as a support, and a non-discoloring pink ink was used for solid printing on a 100 mesh screen plate, followed by drying and curing. Then, a colored layer was formed to obtain a colored support.
On the colored support, 15 parts of wet-process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.], urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink and Chemicals Co., Ltd.] , Solid content 50%] 30 parts, water 40 parts, silicone-based defoamer 0.5 part, water-based ink thickener 3 parts, ethylene glycol 1 part, blocked isocyanate-based crosslinking agent 3 parts mixed white screen printing Solid ink is printed on the entire surface using a 100-mesh screen plate using a printing ink, and dried to form a rectangular porous film having a short side (shortest diameter) length of 0.8 m and an area of 1.0 m 2. An image was formed.
Then, a grid pattern is printed on the porous image with a 100-mesh screen plate using a pink non-color-changing ink and dried to form a non-color-changing colored image to form a water-color-changing writing object. Got
The area ratio of the portion where the non-color-changing colored image was formed and the portion where the non-color-changing colored image was not formed was 20:80 per cm 2 .
The water-discolorable writing material has a texture that cannot be obtained only on a white background due to a porous image because a pink lattice pattern due to a non-discoloring colored image is visually recognized on a white background due to a porous image in a dry state. When the color difference (ΔE * ab ) between the color of the porous image visually recognized in a dry state and the color of the non-discoloring colored image was measured using a fluorescence spectrodensitometer manufactured by Konica Minolta, part number: FD-7. It was 0.
When a water-applying tool in the form of a writing instrument filled with water is applied to the porous image of the water-discoloring writing object, the porous image in that portion becomes transparent, and a pink image (handwriting) appears, Since the color difference (ΔE * ab ) between the color where the quality image is visually recognized in the liquid absorbing state and the color of the non-discoloring colored image is 14.3, which are similar colors, part of the image is a non-discoloring colored image. However, the image was visually recognized as a uniform color image as a whole, and the user and the observer could visually recognize a clear image.
The porous image is provided with a non-discoloring colored image over the entire surface of the porous image even if stains adhered when absorbing liquid due to repeated use or stains are generated due to uneven distribution of components in the image. Therefore, the stains were inconspicuous.

参考例４
水変色性被筆記体セットの作製
参考例３の水変色性被筆記体と、水付着具として先端部にナイロン樹脂からなる繊維ペン体を有し、軸筒内に水を収容可能に構成した筆記具とを組み合わせて水変色性被筆記体セットを得た。
前記水変色性被筆記体セットは、多孔質像に水を収容した前記筆記具を用いて筆記すると、１．０ｃｍ幅のピンク色の像（筆跡）が視認される。
更に、多孔質像が乾燥するにつれてピンク色の像は視認されなくなり、再び多孔質像に水を付着させるとピンク色の像が視認される。 Reference example 4
Preparation of water discoloration cursive set
The water-discoloring writing material of Reference Example 3 was combined with a water-discoloring writing material having a fiber pen made of nylon resin at the tip as a water-adhering tool and capable of containing water in the barrel. I got a cursive set.
When the water-discoloring writing object set is written using the writing instrument in which water is contained in a porous image, a pink image (handwriting) having a width of 1.0 cm is visually recognized.
Furthermore, the porous image image pink color as drying is no longer visible, is visible again when water was adhered to the porous image pink image.

実施例１
水変色性被筆記体の作製
支持体として白色のＡＢＳ製樹脂板上面に、蛍光ピンク色の非変色性インキを用いて１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて着色層を形成して着色支持体を得た。
前記着色支持体上に、湿式法珪酸〔商品名：ニップシールＥ−２００、日本シリカ工業（株）製〕１５部、青色水分散顔料〔商品名：サンダイスーパーブルーＦ７０７−Ｅ、山陽色素（株）製〕０．７部、ウレタンエマルジョン〔商品名：ハイドランＨＷ−９３０、大日本インキ化学工業（株）製、固形分５０％〕３０部、水４０部、シリコーン系消泡剤０．５部、水系インキ用増粘剤３部、エチレングリコール１部、ブロックイソシアネート系架橋剤３部を均一に混合、攪拌してなる白色スクリーン印刷用インキを用いて、１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて短辺（最短径）の長さが０．５ｍであり、面積が０．５ｍ２の楕円形状の多孔質像を形成した。
次いで、前記多孔質像上に、紫色の非変色性インキを用いて１００メッシュのスクリーン版にて×模様を印刷し、乾燥させて非変色性着色像を形成して水変色性被筆記体を得た。
なお、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比は、１ｃｍ２あたり５：９５であった。
前記水変色性被筆記体は、乾燥状態では多孔質像による淡青色に、非変色性着色像による紫色の×模様が視認され、多孔質像による淡青色のみでは得られない質感を有しており、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）をコニカミノルタ製蛍光分光濃度計、品番：ＦＤ−７を用いて測定すると６３．３であった。
前記水変色性被筆記体の多孔質像上に水を充填した筆記具形態の水付着具を適用するとその部分の多孔質像は透明化して、青色と下地ピンク色との混色である紫色の像（筆跡）が現出し、前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）は１４．０であって同系色であるため、像の一部が非変色性着色像を構成していても像は全体として均一な色の像として視認され、使用者及び観察者は明瞭な像を視認することができた。
前記多孔質像は、繰り返しの使用により吸液時に付着した汚れや、像中の成分が偏在してシミができても非変色性着色像が多孔質像上の全面に亘って設けられているため、シミが目立ち難いものであった。 Example 1
Preparation of Water-Discolorable Writing Material On the upper surface of a white ABS resin plate as a support, a non-discoloring ink of fluorescent pink was used for solid printing on a 100 mesh screen plate, followed by drying to form a colored layer. Formed to give a colored support.
On the colored support, 15 parts of wet-process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.], blue water-dispersed pigment [trade name: Sundai Super Blue F707-E, Sanyo Dye Co., Ltd.] Made] 0.7 parts, urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink and Chemicals, Inc., solid content 50%] 30 parts, water 40 parts, silicone antifoaming agent 0.5 part, Solid-print on the entire surface with a 100-mesh screen plate using a white screen printing ink that is prepared by uniformly mixing 3 parts of a thickener for water-based ink, 1 part of ethylene glycol, and 3 parts of a blocked isocyanate cross-linking agent and stirring. Then, it was dried to form an elliptical porous image having a short side (shortest diameter) length of 0.5 m and an area of 0.5 m 2 .
Then, a x pattern is printed on the porous image with a 100-mesh screen plate using a purple non-discoloring ink, and dried to form a non-discoloring colored image to form a water-discoloring writing material. Obtained.
The area ratio of the portion where the non-color-changing colored image was formed and the portion where the non-color-changing colored image was not formed was 5:95 per cm 2 .
The water-discoloring writing material has a texture that cannot be obtained by only the pale blue color due to the porous image, because the pale x color due to the non-discoloring colored image is visible in the pale blue color due to the porous image in the dry state. When the color difference (ΔE * ab ) between the color of the porous image visually recognized in a dry state and the color of the non-discoloring colored image was measured using a fluorescence spectrodensitometer manufactured by Konica Minolta, product number: FD-7, 63 It was .3.
When a water-applying tool in the form of a writing instrument filled with water is applied to the porous image of the water-discoloring writing object, the porous image in that portion becomes transparent, and a purple image which is a mixed color of blue and pink background (Handwriting) appears, and the color difference (ΔE * ab ) between the color visually recognized in the liquid absorbing state of the porous image and the color of the non-discoloring colored image is 14.0, which is a similar color. Even if a part of the image formed a non-discoloring colored image, the image was visually recognized as an image of uniform color as a whole, and the user and the observer could visually recognize a clear image.
The porous image is provided with a non-discoloring colored image over the entire surface of the porous image even if stains adhered when absorbing liquid due to repeated use or stains are generated due to uneven distribution of components in the image. Therefore, the stains were inconspicuous.

実施例２
水変色性被筆記体セットの作製
実施例１の水変色性被筆記体と、水付着具として先端部にポリエステル樹脂からなる繊維ペン体を有し、軸筒内に水を収容可能に構成した筆記具とを組み合わせて水変色性被筆記体セットを得た。
前記水変色性被筆記体セットは、多孔質像に水を収容した前記筆記具を用いて筆記すると、２．０ｃｍ幅の紫色の像（筆跡）が視認される。
更に、多孔質像が乾燥するにつれて紫色の像は視認されなくなり、再び多孔質像に水を付着させると紫色の像が視認される。 Example 2
Manufacture of Water-Discoloring Writing Material Set The water-discoloring writing material of Example 1 and a fiber pen made of polyester resin at the tip as a water-adhering tool were provided so that water could be stored in the barrel. A writing instrument set was combined with a writing instrument to obtain a water-discoloring writing set.
When the water-discolorable writing object set is written using the writing tool in which water is contained in the porous image, a purple image (handwriting) having a width of 2.0 cm is visually recognized.
Furthermore, the porous image image of purple as drying is no longer visible, is visible again when the the porous image adhere water purple image.

実施例３
水変色性被筆記体の作製
支持体として透明な軟質ＰＶＣ樹脂を白色のポリエステルタフタ生地表面にコートした目付量１１０ｇ／ｍ２の加工生地上面に、青色の非変色性インキを用いて１００メッシュのロータリースクリーン版にて全面にベタ印刷し、乾燥させて着色層を形成して着色支持体を得た。
前記着色支持体上に、湿式法珪酸〔商品名：ニップシールＥ−２００、日本シリカ工業（株）製〕１５部、ピンク色蛍光顔料〔商品名：エポカラーＦＰ１０、（株）日本触媒製〕３．０部、ウレタンエマルジョン〔商品名：ハイドランＨＷ−９３０、大日本インキ化学工業（株）製、固形分５０％〕３０部、水４０部、シリコーン系消泡剤０．５部、水系インキ用増粘剤３部、エチレングリコール１部、ブロックイソシアネート系架橋剤３部を均一に混合、攪拌してなる白色スクリーン印刷用インキを用いて、１００メッシュのロータリースクリーン版にて全面にベタ印刷し、乾燥させて短辺（最短径）の長さが１．０ｍであり、面積が１００ｍ２の長方形の多孔質像を形成した。
次いで、前記多孔質像上に、紫色の非変色性インキを用いて１００メッシュのスクリーン版にて線画のハート模様を印刷し、乾燥させて非変色性着色像を形成し、１００ｍの連続したロール状に巻き取って水変色性被筆記体を得た。
なお、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比は、１ｃｍ２あたり３：９７であった。
前記水変色性被筆記体は、乾燥状態では多孔質像による淡ピンク色に、非変色性着色像による紫色の線画のハート模様は視認され、多孔質像による淡ピンク色のみでは得られない質感を有しており、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）をコニカミノルタ製蛍光分光濃度計、品番：ＦＤ−７を用いて測定すると７５．０であった。
前記水変色性被筆記体の多孔質像上に水を充填した筆記具形態の水付着具を適用するとその部分の多孔質像が透明化して、ピンク色と下地青色との混色である紫色の像（筆跡）が現出し、前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）は３３．５であって同系色であるため、像の一部が非変色性着色像を構成していても像は全体として均一な色の像として視認され、使用者及び観察者は明瞭な像を視認することができた。
前記多孔質像は、繰り返しの使用により吸液時に付着した汚れや、像中の成分が偏在してシミができても非変色性着色像が多孔質像上の全面に亘って設けられているため、シミが目立ち難いものであった。 Example 3
Preparation of Water Discolorable Writing Material A transparent soft PVC resin was coated on the surface of a white polyester taffeta cloth as a support, and a 100 mesh mesh using a blue non-discoloring ink on the upper surface of the processed cloth having a basis weight of 110 g/m 2 . Solid printing was performed on the entire surface with a rotary screen plate and dried to form a colored layer to obtain a colored support.
2. 15 parts of wet-process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.] and pink fluorescent pigment [trade name: Epocolor FP10, manufactured by Nippon Shokubai Co., Ltd.] on the colored support. 0 parts, urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink and Chemicals, Inc., solid content 50%] 30 parts, water 40 parts, silicone antifoaming agent 0.5 parts, water-based ink addition Using 3 parts of viscous agent, 1 part of ethylene glycol, and 3 parts of blocked isocyanate cross-linking agent, and uniformly stirring the mixture, a white screen printing ink was used to perform solid printing on a 100 mesh rotary screen plate, followed by drying. Thus, a rectangular porous image having a short side (shortest diameter) of 1.0 m and an area of 100 m 2 was formed.
Then, a heart pattern of a line drawing was printed on the porous image with a 100-mesh screen plate using a purple non-discoloring ink, and dried to form a non-discoloring colored image, and a continuous roll of 100 m. It was wound into a strip to obtain a water-discoloring writing material.
The area ratio of the portion where the non-discoloring colored image was formed and the portion where the non-discoloring colored image was not formed was 3:97 per cm 2 .
In the dry state, the water-discoloring writing material has a light pink color due to the porous image, and the heart pattern of the purple line drawing due to the non-color-changing colored image is visually recognized, and the texture cannot be obtained only with the light pink color due to the porous image. The color difference (ΔE * ab ) between the color of the porous image visually recognized in a dry state and the color of the non-discoloring colored image is measured using a Konica Minolta fluorescence spectrodensitometer, product number: FD-7. It was 75.0.
When a water-applying tool in the form of a writing instrument filled with water is applied to the porous image of the water-discoloring writing object, the porous image in that portion becomes transparent, and a purple image that is a color mixture of pink and blue background. (Handwriting) appears, and the color difference (ΔE * ab ) between the color in which the porous image is visually recognized in the liquid-absorbed state and the color of the non-discoloring colored image is 33.5, which is a similar color. Even if a part of the image formed a non-discoloring colored image, the image was visually recognized as an image of uniform color as a whole, and the user and the observer could visually recognize a clear image.
The porous image is provided with a non-discoloring colored image over the entire surface of the porous image even if stains adhered when absorbing liquid due to repeated use or stains are generated due to uneven distribution of components in the image. Therefore, the stains were inconspicuous.

実施例４
水変色性被筆記体セットの作製
実施例３の水変色性被筆記体を５ｍの長さでカットした多孔質像の面積が５．０ｍ２との水変色性被筆記体と、水付着具として先端部が毛筆からなるペン体を有し、軸筒内に水を収容可能に構成した筆記具とを組み合わせて水変色性被筆記体セットを得た。
前記水変色性被筆記体セットは、多孔質像に水を収容した前記筆記具を用いて筆記すると、３．０ｃｍ幅の紫色の像（筆跡）が視認される。
更に、多孔質像が乾燥するにつれて紫色の像は視認されなくなり、再び多孔質像に水を付着させると紫色の像が視認される。 Example 4
Preparation of Water-Discoloring Writing Material Set A water-discoloring writing material having a porous image area of 5.0 m 2 obtained by cutting the water-discoloring writing material of Example 3 with a length of 5 m, and a water-adhering tool. As a result, a writing instrument set having water discoloration was obtained by combining with a writing instrument having a pen body having a writing brush at its tip and capable of containing water in the barrel.
When the water-discoloring writing object set is written using the writing tool in which water is contained in the porous image, a purple image (handwriting) having a width of 3.0 cm is visually recognized.
Furthermore, as the porous image dries, the purple image becomes invisible, and when water is attached again to the porous image, the purple image becomes visible.

参考例５
水変色性被筆記体の作製
支持体として透明な軟質ＰＶＣ樹脂を白色のポリエステルタフタ生地表面にコートした目付量１１０ｇ／ｍ２の加工生地上面に、青色の非変色性インキを用いて１００メッシュのロータリースクリーン版にて全面にベタ印刷し、乾燥させて着色層を形成して着色支持体を得た。
前記着色支持体上に、湿式法珪酸〔商品名：ニップシールＥ−２００、日本シリカ工業（株）製〕１５部、ウレタンエマルジョン〔商品名：ハイドランＨＷ−９３０、大日本インキ化学工業（株）製、固形分５０％〕３０部、水４０部、シリコーン系消泡剤０．５部、水系インキ用増粘剤３部、エチレングリコール１部、ブロックイソシアネート系架橋剤３部を均一に混合、攪拌してなる白色スクリーン印刷用インキを用いて、１００メッシュのロータリースクリーン版にて全面にベタ印刷し、乾燥させて短辺（最短径）の長さが１．０ｍであり、面積が１００ｍ２の長方形の多孔質像を形成した。
次いで、前記多孔質像上に、青色の非変色性インキを用いて１５０メッシュのスクリーン版にて線画の雪の結晶模様を印刷し、乾燥させて非変色性着色像を形成し、１００ｍの連続したロール状に巻き取って水変色性被筆記体を得た。
なお、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比は、１ｃｍ２あたり１５：８５であった。
前記水変色性被筆記体は、乾燥状態では多孔質像による白色上に、非変色性着色像による青色の雪の結晶模様が視認され、多孔質像による白色のみでは得られない質感を有しており、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）をコニカミノルタ製蛍光分光濃度計、品番：ＦＤ−７を用いて測定すると２５．３であった。
前記水変色性被筆記体の多孔質像上に水を充填した筆記具形態の水付着具を適用するとその部分の多孔質像が透明化して、下地青色の像（筆跡）が現出し、前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）は１８．３であって同系色であるため、像の一部が非変色性着色像を構成していても像は全体として均一な色の像として視認され、使用者及び観察者は明瞭な像を視認することができた。
前記多孔質像は、繰り返しの使用により吸液時に付着した汚れや、像中の成分が偏在してシミができても非変色性着色像が多孔質像上の全面に亘って設けられているため、シミが目立ち難いものであった。 Reference example 5
Preparation of Water Discolorable Writing Material A transparent soft PVC resin was coated on the surface of a white polyester taffeta cloth as a support, and a 100 mesh mesh using a blue non-discoloring ink on the upper surface of the processed cloth having a basis weight of 110 g/m 2 . Solid printing was performed on the entire surface with a rotary screen plate and dried to form a colored layer to obtain a colored support.
On the colored support, 15 parts of wet-process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.], urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink and Chemicals Co., Ltd.] , Solid content 50%] 30 parts, water 40 parts, silicone-based defoamer 0.5 part, water-based ink thickener 3 parts, ethylene glycol 1 part, blocked isocyanate-based crosslinking agent 3 parts are uniformly mixed and stirred. Using a white screen printing ink obtained by the above, solid printing is performed on the entire surface with a 100-mesh rotary screen plate, and dried to have a short side (shortest diameter) length of 1.0 m and an area of 100 m 2 . A rectangular porous image was formed.
Then, a snowflake pattern of a line drawing was printed on the porous image with a screen plate of 150 mesh using a blue non-color-changing ink, and dried to form a non-color-changing colored image, which was continuous for 100 m. It was wound into a roll to obtain a water discoloring writing material.
The area ratio of the portion where the non-color-changing colored image was formed and the portion where the non-color-changing colored image was not formed was 15:85 per cm 2 .
In the dry state, the water-discoloring writing material has a texture that cannot be obtained only by the white color of the porous image, because the blue snowflake pattern of the non-color-changing colored image is visually recognized on the white color of the porous image. And the color difference (ΔE * ab ) between the color in which the porous image is visually recognized in a dry state and the color of the non-discoloring colored image is measured using a fluorescence spectrodensitometer manufactured by Konica Minolta, product number: FD-7. It was 25.3.
When a water-applying tool in the form of a writing instrument filled with water is applied to the porous image of the water-discoloring writing object, the porous image of that portion becomes transparent, and a blue background image (handwriting) appears, Since the color difference (ΔE * ab ) between the color where the quality image is visually recognized in the liquid absorbing state and the color of the non-discoloring colored image is 18.3, which are similar colors, a part of the image is a non-discoloring colored image. However, the image was visually recognized as a uniform color image as a whole, and the user and the observer could visually recognize a clear image.
The porous image is provided with a non-discoloring colored image over the entire surface of the porous image even if stains adhered when absorbing liquid due to repeated use or stains are generated due to uneven distribution of components in the image. Therefore, the stains were inconspicuous.

参考例６
水変色性被筆記体セットの作製
参考例５の水変色性被筆記体を２ｍの長さでカットトした多孔質像の面積が２．０ｍ２の水変色性被筆記体と、水付着具として先端部にナイロン樹脂からなる繊維ペン体を有し、軸筒内に水を収容可能に構成した筆記具とを組み合わせて水変色性被筆記体セットを得た。
前記水変色性描画玩具セットは、多孔質像に水を収容した前記筆記具を用いて筆記すると、１．５ｃｍ幅の青色の像（筆跡）が視認される。
更に、多孔質像が乾燥するにつれて青色の像は視認されなくなり、再び多孔質像に水を付着させると青色の像が視認される。 Reference example 6
Preparation of water discoloration cursive set
A water-discoloring writing material having a porous image area of 2.0 m 2 obtained by cutting the water-discoloring writing material of Reference Example 5 with a length of 2 m, and a fiber pen made of nylon resin at the tip as a water-adhering tool. A water-discoloring writing material set was obtained by combining with a writing instrument having a body and configured to be able to store water in the barrel.
When the water-discoloring drawing toy set is written using the writing instrument containing water in a porous image, a blue image (handwriting) having a width of 1.5 cm is visually recognized.
Furthermore, as the porous image dries, the blue image becomes invisible, and when water is attached again to the porous image, the blue image becomes visible.

比較例１
水変色性被筆記体の作製
支持体として白色のＡＢＳ製樹脂板上面に、蛍光ピンク色の非変色性インキを用いて１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて着色層を形成して着色支持体を得た。
前記着色支持体上に、湿式法珪酸〔商品名：ニップシールＥ−２００、日本シリカ工業（株）製〕１５部、青色水分散顔料〔商品名：サンダイスーパーブルーＦ７０７−Ｅ、山陽色素（株）製〕０．７部、ウレタンエマルジョン〔商品名：ハイドランＨＷ−９３０、大日本インキ化学工業（株）製、固形分５０％〕３０部、水４０部、シリコーン系消泡剤０．５部、水系インキ用増粘剤３部、エチレングリコール１部、ブロックイソシアネート系架橋剤３部を均一に混合、攪拌してなる白色スクリーン印刷用インキを用いて、１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて長方形の多孔質像を形成した。
次いで、前記多孔質像上に、淡青色の非変色性インキを用いて１００メッシュのスクリーン版にて×模様を印刷し、乾燥させて非変色性着色像を形成して水変色性被筆記体を得た。
なお、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比は、１ｃｍ２あたり３５：６５であった。
前記水変色性被筆記体は、乾燥状態では多孔質像による淡青色と非変色性着色像による淡青色の×模様が同色のため、全面ベタの淡青色として視認され、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）をコニカミノルタ製蛍光分光濃度計、品番：ＦＤ−７を用いて測定すると２．６であり、質感に乏しかった。
前記水変色性被筆記体の多孔質像上に水を充填した筆記具形態の水付着具を適用するとその部分の多孔質像は透明化して、青色と下地ピンク色との混色である紫色の像（筆跡）が現出し、前記多孔質像が吸液状態で視認される紫色と、非変色性着色像の淡青色の色差（ΔＥ＊ ａｂ）は６７．１であり、色調が異なるため非変色着色像が明瞭に視認され、使用者及び観察者は水を充填した筆記具で描いた像を明瞭に視認することはできなかった。
前記多孔質像は、乾燥状態において非変色性着色像が視認されないため、繰り返しの使用により吸液時に付着した汚れや、像中の成分が偏在して発生するシミが目立つ傾向にあった。 Comparative Example 1
Preparation of Water-Discolorable Writing Material On the upper surface of a white ABS resin plate as a support, a non-discoloring ink of fluorescent pink was used for solid printing on a 100 mesh screen plate, followed by drying to form a colored layer. Formed to give a colored support.
On the colored support, 15 parts of wet-process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.], blue water-dispersed pigment [trade name: Sundai Super Blue F707-E, Sanyo Dye Co., Ltd.] Made] 0.7 parts, urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink and Chemicals, Inc., solid content 50%] 30 parts, water 40 parts, silicone antifoaming agent 0.5 part, Solid-print on the entire surface with a 100-mesh screen plate using a white screen printing ink that is prepared by uniformly mixing 3 parts of a thickener for water-based ink, 1 part of ethylene glycol, and 3 parts of a blocked isocyanate cross-linking agent and stirring. And dried to form a rectangular porous image.
Next, a water-discoloring writing material is formed by printing a X pattern on the porous image with a 100-mesh screen plate using a light blue non-discoloring ink and drying it to form a non-discoloring colored image. Got
The area ratio of the portion where the non-color-changing colored image was formed and the portion where the non-color-changing colored image was not formed was 35:65 per cm 2 .
In the dry state, the water-discoloring writing material is visually perceived as a solid light blue color because the light blue x-pattern of the porous image and the light blue x-pattern of the non-color-changing colored image are the same color, and the porous image is dried. The color difference (ΔE * ab ) between the color visually recognized in the state and the color of the non-discoloring colored image was 2.6 using a Konica Minolta fluorescence spectrophotometer, product number: FD-7, and the texture was poor. It was
When a water-applying tool in the form of a writing instrument filled with water is applied to the porous image of the water-discoloring writing object, the porous image in that portion becomes transparent, and a purple image which is a mixed color of blue and pink background (Handwriting) appears, and the color difference (ΔE * ab ) between the purple color in which the porous image is visually recognized in a liquid-absorbing state and the light blue color in the non-discoloring colored image is 67.1, and the color tone is different, and thus the non-discoloring The colored image was clearly visible, and the user and the observer could not clearly see the image drawn with the writing instrument filled with water.
Since the non-discoloring colored image is not visually recognized in the dry state in the porous image, stains adhered during liquid absorption by repeated use and stains caused by uneven distribution of components in the image tended to be conspicuous.

比較例２
水変色性被筆記体の作製
支持体として透明な軟質ＰＶＣ樹脂を白色のポリエステルタフタ生地表面にコートした生地上面に、青色の非変色性インキを用いて１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて着色層を形成して着色支持体を得た。
前記着色支持体上に、湿式法珪酸〔商品名：ニップシールＥ−２００、日本シリカ工業（株）製〕１５部、ピンク色蛍光顔料〔商品名：エポカラーＦＰ１０、（株）日本触媒製〕３．０部、ウレタンエマルジョン〔商品名：ハイドランＨＷ−９３０、大日本インキ化学工業（株）製、固形分５０％〕３０部、水４０部、シリコーン系消泡剤０．５部、水系インキ用増粘剤３部、エチレングリコール１部、ブロックイソシアネート系架橋剤３部を均一に混合、攪拌してなる白色スクリーン印刷用インキを用いて、１００メッシュのスクリーン版にて全面にベタ印刷し、乾燥させて長方形の多孔質像を形成した。
次いで、前記多孔質像上に、淡ピンク色の非変色性インキを用いて１００メッシュのスクリーン版にて線画のハート模様を印刷し、乾燥させて非変色性着色像を形成して水変色性被筆記体を得た。
なお、前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比は、１ｃｍ２あたり０．５：９９．５であった。
前記水変色性被筆記体は、乾燥状態では、多孔質像による淡ピンク色と非変色性着色像による淡ピンク色の線画のハート模様が同色のため、全面ベタの淡ピンク色として視認され、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）をコニカミノルタ製蛍光分光濃度計、品番：ＦＤ−７を用いて測定すると６．１であり、質感に乏しかった。
前記水変色性被筆記体の多孔質像上に水を充填した筆記具形態の水付着具を適用するとその部分の多孔質像は透明化して、ピンク色と下地青色との混色である紫色の像（筆跡）が現出し、前記多孔質像が吸液状態で視認される紫色と、非変色性着色像の淡ピンク色の色差（ΔＥ＊ ａｂ）は４７．１であり、色調が異なるために非変色着色像が明瞭に視認された。
前記多孔質像は、乾燥状態において非変色性着色像が視認されないため、繰り返しの使用により吸液時に付着した汚れや、像中の成分が偏在して発生するシミが目立つ傾向にあった。 Comparative example 2
Preparation of water discolorable writing material Solid polyester is printed on the entire surface with a 100 mesh screen plate using blue non-discoloring ink on the surface of a white polyester taffeta cloth coated with a transparent soft PVC resin as a support. Then, it was dried to form a colored layer to obtain a colored support.
2. 15 parts of wet-process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.] and pink fluorescent pigment [trade name: Epocolor FP10, manufactured by Nippon Shokubai Co., Ltd.] on the colored support. 0 parts, urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink and Chemicals, Inc., solid content 50%] 30 parts, water 40 parts, silicone antifoaming agent 0.5 parts, water-based ink addition Using 3 parts of viscous agent, 1 part of ethylene glycol, and 3 parts of blocked isocyanate-based cross-linking agent uniformly, and stirring the mixture, a white screen printing ink is used to perform solid printing on a 100 mesh screen plate and dry it. To form a rectangular porous image.
Then, a heart pattern of a line drawing is printed on the porous image with a 100-mesh screen plate using a light pink non-color-changing ink, and dried to form a non-color-changing colored image and water discoloration. A cursive body was obtained.
The area ratio of the portion where the non-discoloring colored image was formed and the portion where the non-discoloring colored image was not formed was 0.5:99.5 per cm 2 .
In the dry state, the water-discoloring writing material is perceived as a light solid pink color on the whole surface because the light pink line drawing of the porous image and the light pink line drawing heart pattern of the non-color-changing colored image have the same color. The color difference (ΔE * ab ) between the color of the porous image visually recognized in a dry state and the color of the non-discoloring colored image was measured by using a fluorescence spectrodensitometer manufactured by Konica Minolta, product number: FD-7. And the texture was poor.
Porous image of that portion Applying water attachment member of the writing instrument form filled with water on the porous image of the water-discoloring the cursive and transparent, violet is a mixture of the pink color and the background blue The image (handwriting) appears, and the color difference (ΔE * ab ) between the purple color in which the porous image is visually recognized in a liquid-absorbing state and the light pink color in the non-discoloring colored image is 47.1, and the color tones are different. A non-discolored colored image was clearly visible.
Since the non-discoloring colored image is not visually recognized in the dry state in the porous image, stains adhered during liquid absorption by repeated use and stains caused by uneven distribution of components in the image tended to be conspicuous.

１ 水変色性被筆記体
２ 着色支持体
３ 多孔質像
４ 非変色性着色像
５ 水付着具 1 Water-discolorable writing material 2 Colored support 3 Porous image 4 Non-discoloration colored image 5 Water-adhering tool

Claims (10)

着色支持体上に、低屈折率顔料をバインダー樹脂に分散状態に固着させた、吸液状態と非吸液状態で透明性が異なる連続した多孔質像と、前記多孔質像を部分的に覆う非変色性着色像を多孔質像上の全面に亘って設けてなり、前記多孔質像中に非変色性着色剤を含有してなり、前記多孔質像が吸液状態で視認される着色支持体の色と非変色性着色剤の色が混色となった色と、非変色性着色像の色が同一又は同系色であることを特徴とする水変色性被筆記体。 On a colored support, a low refractive index pigment is fixed to a binder resin in a dispersed state, a continuous porous image having different transparency in a liquid absorbing state and a non-liquid absorbing state, and the porous image is partially covered. the non-color-changing colored image becomes disposed over the entire surface of the porous image, and also contains a non-color-changing colorant in the porous image, colored supporting said porous image is visually recognized in a liquid absorption state A water-discolorable writing material characterized in that the color of the body and the color of the non-color-changing colorant are mixed, and the color of the non-color-changing colored image is the same or similar. 前記多孔質像が吸液状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）が４５以下であり、且つ、前記多孔質像が乾燥状態で視認される色と、非変色性着色像の色の色差（ΔＥ＊ ａｂ）が１０以上である請求項１記載の水変色性被筆記体。 The color difference (ΔE * ab ) between the color of the porous image visually perceived in the liquid absorbing state and the color of the non-discoloring colored image is 45 or less, and the color of the porous image visually observable in the dry state. The water discolorable writing material according to claim 1, wherein the color difference (ΔE * ab ) of the color of the non-discolorable colored image is 10 or more. 前記非変色性着色像を形成した部分と、非変色性着色像を形成していない部分の面積比が１ｃｍ２あたり１：９９〜３０：７０である請求項１又は２記載の水変色性被筆記体。 The water discolorable coating according to claim 1 or 2, wherein an area ratio of a portion where the non-discolorable colored image is formed and an area where the non-discolorable colored image is not formed is 1:99 to 30:70 per cm 2. Cursive. 前記着色支持体が基材上に着色層を設けた支持体である請求項１乃至３のいずれか一項に記載の水変色性被筆記体。The water-discolorable writing material according to any one of claims 1 to 3, wherein the colored support is a support having a colored layer provided on a substrate. 前記着色支持体が可撓性を有する支持体である請求項１乃至４のいずれか一項に記載の水変色性被筆記体。The water discolorable writing material according to any one of claims 1 to 4, wherein the colored support is a flexible support. 前記可撓性を有する支持体が合成樹脂又は布帛である請求項５記載の水変色性被筆記体。The water discolorable writing material according to claim 5, wherein the flexible support is a synthetic resin or a cloth. 前記多孔質像の面積が０．５ｍThe area of the porous image is 0.5 m ２Two 以上であり、多孔質像の最短径が０．５ｍ以上である請求項１乃至６のいずれか一項に記載の水変色性被筆記体。It is above, and the shortest diameter of a porous image is 0.5 m or more, The water discoloration writing material according to any one of claims 1 to 6. 請求項１乃至７のいずれか一項に記載の水変色性被筆記体と水付着具とからなる水変色性被筆記体セット。A water-discoloring writing material set comprising the water-discoloring writing material according to any one of claims 1 to 7 and a water-adhering tool. 前記水付着具が筆記具又は塗布具形態の水付着具である請求項８記載の水変色性被筆記体セット。The water discolorable writing set according to claim 8, wherein the water-adhering tool is a writing tool or a water-adhering tool in the form of an applicator. 前記筆記具又は塗布具形態の水付着具により形成される筆跡幅が０．５〜３ｃｍの範囲にある請求項９記載の水変色性被筆記体セット。The water discolorable writing set according to claim 9, wherein a handwriting width formed by the writing implement or the water applicator in the form of an applicator is in a range of 0.5 to 3 cm.
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