JPS6330284A - Method for reproducing erased image and material used therein - Google Patents
Method for reproducing erased image and material used thereinInfo
- Publication number
- JPS6330284A JPS6330284A JP61174901A JP17490186A JPS6330284A JP S6330284 A JPS6330284 A JP S6330284A JP 61174901 A JP61174901 A JP 61174901A JP 17490186 A JP17490186 A JP 17490186A JP S6330284 A JPS6330284 A JP S6330284A
- Authority
- JP
- Japan
- Prior art keywords
- image
- acid
- erased
- alkali
- ink
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000000463 material Substances 0.000 title claims description 7
- 239000001018 xanthene dye Substances 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 7
- 238000010306 acid treatment Methods 0.000 claims abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000007864 aqueous solution Substances 0.000 abstract description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000344 soap Substances 0.000 abstract description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 abstract description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 125000003277 amino group Chemical group 0.000 abstract description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract description 2
- 239000000920 calcium hydroxide Substances 0.000 abstract description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 2
- 235000014113 dietary fatty acids Nutrition 0.000 abstract description 2
- 239000000194 fatty acid Substances 0.000 abstract description 2
- 229930195729 fatty acid Natural products 0.000 abstract description 2
- 229910052736 halogen Inorganic materials 0.000 abstract description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 abstract description 2
- 239000000347 magnesium hydroxide Substances 0.000 abstract description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 abstract description 2
- 125000001834 xanthenyl group Chemical group C1=CC=CC=2OC3=CC=CC=C3C(C12)* 0.000 abstract description 2
- 150000001447 alkali salts Chemical class 0.000 abstract 1
- 150000004665 fatty acids Chemical class 0.000 abstract 1
- 150000002367 halogens Chemical class 0.000 abstract 1
- 239000001384 succinic acid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 239000004744 fabric Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 238000004040 coloring Methods 0.000 description 3
- GVKCHTBDSMQENH-UHFFFAOYSA-L phloxine B Chemical compound [Na+].[Na+].[O-]C(=O)C1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C([O-])=C(Br)C=C21 GVKCHTBDSMQENH-UHFFFAOYSA-L 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- -1 carboxyphenyl group Chemical group 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- IICCLYANAQEHCI-UHFFFAOYSA-N 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound O1C(=O)C(C(=C(Cl)C(Cl)=C2Cl)Cl)=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 IICCLYANAQEHCI-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000004826 Synthetic adhesive Substances 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- IINNWAYUJNWZRM-UHFFFAOYSA-L erythrosin B Chemical compound [Na+].[Na+].[O-]C(=O)C1=CC=CC=C1C1=C2C=C(I)C(=O)C(I)=C2OC2=C(I)C([O-])=C(I)C=C21 IINNWAYUJNWZRM-UHFFFAOYSA-L 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229930187593 rose bengal Natural products 0.000 description 1
- 229940081623 rose bengal Drugs 0.000 description 1
- STRXNPAVPKGJQR-UHFFFAOYSA-N rose bengal A Natural products O1C(=O)C(C(=CC=C2Cl)Cl)=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 STRXNPAVPKGJQR-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
- B41M5/132—Chemical colour-forming components; Additives or binders therefor
- B41M5/136—Organic colour formers, e.g. leuco dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Toys (AREA)
- Color Printing (AREA)
- Coloring (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、画像支持体上に形成した消色画像を再現する
方法及びそれに用いる材料に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for reproducing a decolorized image formed on an image support and a material used therein.
従来、インクで記載した画像を消色する技術は種々知ら
れており、消色性ラインマーカー等として応用されてい
る。このようなインク消色技術は。Conventionally, various techniques for erasing images written with ink have been known, and have been applied as erasable line markers and the like. This kind of ink erasing technology.
−度記載した画像を消色させ得る点で、子供達にとって
興味あるものであるが、消色した画像を再び再現させ得
れば、さらに興味深い画像の消色−再現システムが得ら
れる。This is interesting for children because it is possible to erase a previously written image, but if the erased image can be reproduced again, an even more interesting image erasing and reproduction system can be obtained.
〔目 的〕 、
本発明はこのような観点からなされたものであり、新規
な画像の消色−再現システムを提供することを目的とす
る。[Objective] The present invention has been made from this viewpoint, and it is an object of the present invention to provide a novel image erasing and reproducing system.
本発明によれば、画像支持体上にキサンテン系染料を主
成分とするインクで画像を形成し、次いでその画像を酸
処理して消色させた後、その消色画像上をアルカリ処理
して消色画像を再現させることを特徴とする消色画像の
再現方法が提供される。According to the present invention, an image is formed on an image support with an ink containing a xanthene dye as a main component, and then the image is treated with an acid to decolor it, and then the decolorized image is treated with an alkali. A method for reproducing a decolorized image is provided, which is characterized by reproducing a decolorized image.
本発明において用いるインクとしては、キサンテン系染
料を含むものが用いられるが、このキサンテン系染料は
次の一般式で表わされるキサンテン環を基本骨格構造と
して有するものであり、種々の誘導体が包含される。The ink used in the present invention contains a xanthene dye, and the xanthene dye has a xanthene ring represented by the following general formula as a basic skeleton structure, and includes various derivatives. .
（式中、Ｒは置換基、たとえばハロゲン、水酸基、アミ
ノ基などを表わす）
本発明で用いる好ましいキサンテン系染料は、オルト−
カルボキシフェニル基を９位に持つオキシキサンテン染
料であり、エオシン、エリスロシン、フロキシン、ロー
ズベンガル等の使用が好適である。(In the formula, R represents a substituent such as halogen, hydroxyl group, amino group, etc.)
It is an oxyxanthene dye having a carboxyphenyl group at the 9-position, and eosin, erythrosin, phloxine, rose bengal, etc. are preferably used.
本発明で用いるインクにおいて、そのインク成分として
用いるキサンテン系染料のインク中濃度は０．１〜１５
重量％、通常０．２〜１０重量％重量％布分である。こ
のインクには、慣用の補助成分を添加することができ、
例えば、染料の画像支持体上への付着性を高めるために
、カルボキシメチルセルロース、デンプン、合成接着剤
等のバインダー成分や、インクの乾燥を防止するために
、グリセリン、ポリエチレングリコール等の乾燥防止剤
を添加することができる。In the ink used in the present invention, the concentration of the xanthene dye used as an ink component in the ink is 0.1 to 15
% by weight, usually 0.2-10% by weight distribution. Conventional auxiliary ingredients can be added to this ink,
For example, binder components such as carboxymethylcellulose, starch, and synthetic adhesives are used to improve the adhesion of dyes to the image support, and drying inhibitors such as glycerin and polyethylene glycol are used to prevent ink from drying. Can be added.
本発明においては、画像支持体上に前記インクを用いて
画像を形成する。この場合、画像支持体としては、固体
表面を有するもの、例えば、紙、布、木板等が用いられ
る。また、この場合の画像は、手書きや、印刷機を用い
て行うことができる。In the present invention, an image is formed on an image support using the ink. In this case, the image support used is one having a solid surface, such as paper, cloth, wooden board, etc. Further, the image in this case can be created by hand or by using a printing machine.
なお、本明細書で言う画像とは広く解釈されるものとし
、文字や、図案等の画線を意味するものとする。Note that the term "image" used in this specification is broadly interpreted to mean characters, drawing lines of designs, etc.
このようにして支持体上に形成された画像は、酸処理す
ることによって消色される。この場合、酸処理は、クエ
ン酸や、コハク酸等の有機酸や、硫酸等の無機酸を含む
酸性水溶液が用いられるが、硫酸の水溶液の使用が好ま
しい。水溶液中の酸濃度は、０．１〜２０重量％、通常
、０．３〜１０重量％で充分である。この酸処理により
、キサンテン系染料の画像は消色する。The image thus formed on the support is decolorized by acid treatment. In this case, for the acid treatment, an acidic aqueous solution containing an organic acid such as citric acid or succinic acid, or an inorganic acid such as sulfuric acid is used, and it is preferable to use an aqueous solution of sulfuric acid. The acid concentration in the aqueous solution is preferably 0.1 to 20% by weight, usually 0.3 to 10% by weight. This acid treatment erases the color of the xanthene dye image.
前記のようにして消色された画像は、その消色状態を継
続するが、この消色画像は、必要に応じて、アルカリ処
理することによって再現させることができる。アルカリ
処理は、消色画像上にアルカリ性物質を接触させること
により行われるが、この場合、アルカリ性物質としては
、水酸化アルカリのような強アルカリであることは必要
とされず、炭酸アルカリ塩や、高級脂酸アルカリ塩（石
けん）、水酸化カルシウム、水酸化マグネシウム等の弱
アルカリで充分である。また、消色画像の再現に用いる
アルカリ性物質は、水溶液として使用される他、粘土や
、シリカ、アルミナ等のフィラーと混合した固体状で用
いることもできるし、さらに、紙や、布等に含浸させて
用いることができる。The image decolored as described above continues to be in its decolored state, but this decolored image can be reproduced by alkali treatment, if necessary. Alkaline processing is performed by bringing an alkaline substance into contact with the decolorized image, but in this case, the alkaline substance does not need to be a strong alkali such as alkali hydroxide, but an alkaline carbonate, Weak alkalis such as higher fatty acid alkali salts (soap), calcium hydroxide, and magnesium hydroxide are sufficient. In addition, the alkaline substance used to reproduce the erased image can be used in the form of an aqueous solution, or in the solid form mixed with fillers such as clay, silica, or alumina, or it can be impregnated into paper, cloth, etc. It can be used with
本発明によれば、画像支持体上にキサンテン系染料を主
成分とするインクで画像を形成した後。According to the present invention, after forming an image on an image support with an ink containing a xanthene dye as a main component.
その画像を酸処理して消色させた消色画像を有する支持
体と、アルカリ性物質とからなる画像再現用材料が提供
される。このような材料は、商品のような材料は、商品
として販売され、ユーザーによって消色画像は再現され
る。本発明による好ましい実施態様によれば、１枚の紙
や布の一方の部分に消色画像を形成し、他方の部分にア
ルカリ性物質を含浸支持させた消色画像再現用材料が提
供される。このような材料は、これに水を加えて揉み、
その消色画像部にアルカル性物質を接触させることによ
り、その消色画像を再現させることができる。An image reproducing material is provided which includes a support having a decolorized image obtained by decolorizing the image by acid treatment, and an alkaline substance. Such materials are sold as commercial products, and the erased images are reproduced by users. According to a preferred embodiment of the present invention, a material for reproducing a colorless image is provided, in which a colorless image is formed on one part of a sheet of paper or cloth, and the other part is impregnated and supported with an alkaline substance. For such materials, add water to it and knead it.
By bringing an alkaline substance into contact with the decolorized image area, the decolorized image can be reproduced.
本発明は、前記構成であり、支持体上に形成した画像を
単に消色させるだけでなく、その消色画像を必要に応じ
て再現することができるので、子供達の遊戯方法や遊戯
具等として有利に利用される。The present invention has the above-mentioned configuration, and can not only erase the color of the image formed on the support, but also reproduce the erased image as needed. be used advantageously as
次に本発明を実施例によってさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
実施例１
水１００ｍ Ｑにフロキシン１ｇを加え溶解し桃色のイ
ンクを作成した。別に水１００ｍＱに濃硫酸（９５重量
％）３ｍ Ｑを加えて消色液を作成した。また、更に水
１００ｍ Ｑに炭酸ナトリウムを５ｇ加えて溶解させ、
発色液を作成した。Example 1 1 g of phloxine was added and dissolved in 100 m of water to prepare a pink ink. Separately, a decolorizing solution was prepared by adding 3 mQ of concentrated sulfuric acid (95% by weight) to 100 mQ of water. In addition, add 5 g of sodium carbonate to 100 m of water and dissolve it.
A coloring solution was created.
次に、木綿布に上記のインクで文字を記載し、次にその
上を消色液をもって拭き、文字を消色させた。更に炭酸
ナトリウム水溶液からなる発色液でその上を塗布すると
、桃色のインクで書いた文字が呈色し、再現された。Next, letters were written on a cotton cloth using the above ink, and then the letters were wiped with an erasing liquid to erase the letters. When a coloring liquid made from an aqueous sodium carbonate solution was applied over it, the letters written in pink ink changed color and were reproduced.
実施例２
水１００＋ａｆｌにフロキシン２ｇを加えて溶解させ、
更にこれに０．５重量％のカルボキシメチルセルロース
水溶液を１ｇ加え桃色のインクを作成した。別に水１０
０ＩＩＱの濃硫酸（９５重量％）２ＩＩｍを加えて消色
液を作成した。不織布に上記の桃色のインクで文字を書
き、次にその上を消色液を用いて文字髪消去させた。Example 2 Add and dissolve 2 g of Phloxine in 100+ afl of water,
Further, 1 g of a 0.5% by weight aqueous carboxymethylcellulose solution was added to prepare a pink ink. Separately 10 liters of water
A decoloring solution was prepared by adding 2IIm of concentrated sulfuric acid (95% by weight) of 0IIQ. Letters were written on the nonwoven fabric using the pink ink described above, and then the letters were erased using an erasing liquid.
次に、この上に固形のステアリン酸ナトリウムを主成分
とする石けんを塗布し、これに水を加えて揉むとインク
が呈色し、文字は再現した。Next, a soap containing solid sodium stearate as the main ingredient was applied onto the ink, and when water was added and rubbed, the ink changed color and the letters were reproduced.
実施例３
水１００ｍ Ｑにエオシン２ｇを溶解させて赤色インク
を作成した。別に水１００ｍΩに濃硫酸（９５重量％）
１＋ｎＱを加えて消色液を作成した。また、更に水１０
０ｍｆｌに炭酸ナトリウムを３ｇ溶解させて、発色液を
作成した。Example 3 A red ink was prepared by dissolving 2 g of eosin in 100 m of water. Separately, concentrate sulfuric acid (95% by weight) in 100 mΩ of water.
A decoloring solution was prepared by adding 1+nQ. Also, 10 more water
A coloring solution was prepared by dissolving 3 g of sodium carbonate in 0 mfl.
次に、紙に上記のインクで文字を記載し、次にその」二
を消色液を用いて拭き、文字を消色させた。Next, letters were written on the paper using the above ink, and then the letters were wiped with a color erasing liquid to erase the color.
更に炭酸ナトリウム水溶液でその上を塗布すると、赤色
のインクで書いた文字が呈色し、再現された。When an aqueous solution of sodium carbonate was applied over it, the letters written in red ink changed color and were reproduced.
Claims (2)
インクで画像を形成し、次いでその画像を酸処理して消
色させた後、その消色画像上をアルカリ処理して消色画
像を再現させることを特徴とする消色画像の再現方法。(1) An image is formed on an image support with an ink containing xanthene dye as a main component, and then the image is treated with an acid to decolor, and then the decolorized image is treated with an alkali to form a decolorized image. A method for reproducing a decolorized image, characterized by reproducing a colorless image.
インクで画像を形成した後、その画像を酸処理して消色
させた消色画像を有する支持体と、アルカリ性物質とか
らなる画像再現材料。(2) An image made of an alkaline substance and a support having a decolorized image formed by forming an image on the support with an ink containing xanthene dye as a main component and decolorizing the image by acid treatment. reproduction material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61174901A JPS6330284A (en) | 1986-07-25 | 1986-07-25 | Method for reproducing erased image and material used therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61174901A JPS6330284A (en) | 1986-07-25 | 1986-07-25 | Method for reproducing erased image and material used therein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6330284A true JPS6330284A (en) | 1988-02-08 |
| JPH0336672B2 JPH0336672B2 (en) | 1991-06-03 |
Family
ID=15986670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61174901A Granted JPS6330284A (en) | 1986-07-25 | 1986-07-25 | Method for reproducing erased image and material used therein |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6330284A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54115907A (en) * | 1977-12-02 | 1979-09-08 | Barry Graham Charles | Thin sheet printed with transparent ink* and developer eraser for said ink |
-
1986
- 1986-07-25 JP JP61174901A patent/JPS6330284A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54115907A (en) * | 1977-12-02 | 1979-09-08 | Barry Graham Charles | Thin sheet printed with transparent ink* and developer eraser for said ink |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0336672B2 (en) | 1991-06-03 |
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