JPH0885250A - Notice sheet, notice display and manufacture - Google Patents

Abstract

PURPOSE: To obtain a highly durable, sharp and highly fine pattern by applying a cationic substance to a sheet material composed of a plastic substrate and an ink receptor layer after ink jet recording is effected. CONSTITUTION: A necessary picture is formed on an ink receptor layer of a recording sheet by means of an ink jet system so that a cationic substance is applied on a surface thereof. The cationic substance used is preferably a cationic polymer such as polyallylamine hydrochloride, polyaminesulfone hydrochloride, polyvinylamine hydrochloride, chitosan acetate and the like. Since a pattern is directly transmitted as an image signal to an ink jet recording head from a control device of the ink jet recording head to be recorded to be formed, even patterns of original design in a small lot can be simply provided at a low cost to have an image durability equivalent to that of prior art patterns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-sized bulletin board for the purpose of posting information for a long period of time indoors and outdoors such as signboards, illuminated advertisements, banners, posters and interiors.
In particular, the present invention relates to a notice sheet having a clear and high-definition pattern. The present invention also relates to a manufacturing method for providing the above-mentioned notice sheet simply and at low cost.

[0002]

2. Description of the Related Art Conventionally, in fields where natural images and multicolor printing are required, bulletin boards are produced by printing images on glass, film, paper, etc., or by using a silver salt photographic method. It had been. For this reason, a large-scale manufacturing apparatus is required, a plate-making process and a developing process are required, and the manufacturing process is complicated. Therefore, there are problems that the manufacturing cost is high, it is difficult to cope with small-lot production, and once the design is decided, it cannot be easily changed.

On the other hand, the ink jet recording system has attracted attention because it has a small system and can directly and easily print the output from a computer, and it is particularly easy to form a full color image. If it is possible to produce a bulletin board sheet by using an inkjet recording method, there is an advantage that the above problems are solved and the degree of freedom of expression is increased.

[0004]

The problem in forming a notice sheet by using the ink jet recording system is that the ink jet recording system uses a water-soluble dye as a recording agent, and therefore it has a problem in comparison with the conventional system. The image robustness is somewhat inferior. For example, when a coated paper having a porous surface as disclosed in JP-A-59-35977 is used as an image forming recording medium to form an image by inkjet recording, the attached dye is recorded. Since it is directly exposed to the air even after that, it is easy to cause fading of the image.

In a sheet material having a coating layer made of a water-soluble resin on a PET substrate as described in JP-A-61-110483, the dye after recording is contained in the coating layer, so that the image is formed. However, since the coat layer is formed of a water-soluble resin, the image lacks water resistance. In a recording sheet (hereinafter referred to as BPF) disclosed in JP-A-62-280068, the ink applied from the porous layer permeates the porous layer and is contained in the resin layer thereunder, It is designed to be viewed from the PET film side, which is the material. Such a recording sheet has excellent image clarity,
Also, it does not cause discoloration and has excellent water resistance. A problem with this recording sheet is that the impermeable dye remaining in the porous layer bleeds when placed in a high humidity environment.

Therefore, an object of the present invention is to provide a bulletin board sheet, particularly a bulletin board sheet having a clear and high-definition pattern. Still another object of the present invention is to provide a method for inexpensively producing a posting sheet having an original design picture even in a small amount. Another object of the present invention is to provide a notice sheet using an inkjet recording system.

[0007]

The above objects can be achieved by the present invention described below. That is, the present invention is a sheet for displaying, a plastic substrate and an ink receiving layer, which is characterized in that a cationic material is applied to a sheet material comprising a plastic substrate and an ink receiving layer after inkjet recording. A method for producing a bulletin board sheet, which comprises applying a cationic substance to the sheet material after ink jet recording, and supporting the bulletin board sheet with glass, plastic or a building material. It is a characteristic display for bulletin boards.

[0008]

According to the present invention, after the ink-jet recording, a cationic substance is applied to the recording surface to insolubilize the dye in the sheet material after the recording, so that it is equal to or more than the conventional printing or silver salt photographic method. There is provided a posting sheet having an image having the same sharpness and resolution as that of the prior art, while having water resistance and moisture resistance equivalent to those of the prior art. Further, as a preferred embodiment of the present invention, by combining with BPF as a recording sheet, fading of a recorded image does not occur,
Further, a notice sheet having excellent water resistance and moisture resistance is provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to preferred embodiments. The posting sheet of the present invention is
A sheet material composed of a plastic substrate and an ink receiving layer is characterized by being subjected to inkjet recording and then having a cationic substance applied to its recording surface.

Examples of the plastic substrate constituting the recording sheet used in the present invention include polyester resins, diacetate resins, triacetate resins, polyolefin resins such as polyethylene and polypropylene,
Polystyrene resin, acrylic resin, polycarbonate resin, polyvinyl chloride resin, polyimide resin,
Films or plates such as cellophane and celluloid can be used. The thickness of these plastic substrates is not particularly limited, but is generally about 10 μm to 5,000 μm.

The ink-receiving layer formed on the plastic substrate is formed of a water-soluble or hydrophilic polymer so that the ink used is generally a water-based ink so that these inks can be absorbed and retained. Examples of useful polymers include albumin, gelatin, casein, starch, cationic starch, gum arabic, natural resin such as sodium alginate, carboxymethyl cellulose, hydroxyethyl cellulose, polyamide, polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, and quaternized polyvinyl. Pyrrolidone, polyvinylpyridylium halide, melamine resin, phenol resin, alkyd resin,
Synthetic resins such as polyurethane, polyvinyl alcohol, ion-modified polyvinyl alcohol, polyester, and sodium polyacrylate, as well as hydrophilic polymers made by cross-linking these polymers to make them water-insoluble, and hydrophilic and water composed of two or more polymers. Examples thereof include insoluble polymer complexes and hydrophilic and water-insoluble polymers having hydrophilic segments.

As a method for forming the ink receiving layer on the plastic substrate, a coating solution is prepared by dissolving or dispersing a mixture containing the above-mentioned polymer or suitable additives in a suitable solvent. Is coated on a plastic substrate by a known method such as a roll coating method, a rod bar coating method, a spray coating method, an air knife coating method, and then a method of rapidly drying or hot-melt coating of the above materials. Methods and the like. The ink receiving layer thus formed is
Usually, the thickness is about 5 to 100 μm.

A particularly preferable recording sheet material in the present invention has a constitution in which an ink holding layer and an ink transport layer are sequentially laminated on a polyethylene terephthalate film as a transparent plastic substrate to form an ink receiving layer. The ink transport layer is an opaque porous layer formed mainly of particles that are non-dyeable to the dye in the ink and a binder resin. The ink holding layer is a transparent resin layer formed mainly of a hydrophilic resin. The ink jet recording image is formed by the fact that most of the ink droplets applied by the ink jet recording method from the surface of the ink transport layer penetrate the ink transport layer and are retained in the ink retaining layer. An example of an inkjet recording medium composed of such a plastic substrate, an ink holding layer and an ink transport layer is described in, for example, JP-A-62-280068.

Next, the ink jet recording system for forming the picture on the notice sheet of the present invention will be described below. As the ink itself for ink jet recording, a known ink can be used without any problem. As the ink recording agent, a direct dye, an acid dye, a basic dye, and a water-soluble dye represented by an edible pigment can be used, and any ordinary ink-jet recording agent can be used without particular limitation. I can. A particularly preferred dye is a water-soluble dye having an anionic group. Such a recording agent is generally used in a conventional ink in a proportion of about 0.1 to 20% by weight, and the same may be applied to the present invention.

The solvent used for the water-based ink used in the present invention is water or a mixed solvent of water and a water-soluble organic solvent, and particularly preferable is a mixed solvent of water, a water-soluble organic solvent and water-soluble organic solvent. It contains a polyhydric alcohol having an effect of preventing the ink from drying as an organic solvent. In the present invention, in the method of ejecting the cationic substance from the recording head, the same one as described above can be used as a solvent for the cationic substance.

The ink jet recording method for recording by applying the above-mentioned ink may be any method as long as it can effectively separate the ink from the nozzle and apply the ink to the recording sheet as a range. . In particular, JP-A-54
In the method described in JP-A-59936, an ink jet method in which ink subjected to the action of thermal energy causes a rapid volume change, and the action force due to this state change ejects the ink from a nozzle is effectively used. Can be done.

Examples of preferred ink jet recording heads that can be used in the present invention are shown in FIGS. 1, 2 and 3. The head 13 is adhered to a heating head 15 (a head is shown in the drawing, but not limited to this) used for heat-sensitive recording, such as glass, ceramics or a plastic plate having a groove 14 through which ink passes. Obtained. The heating head 15 has a protective film 1 formed of silicon oxide or the like.
6, an aluminum electrode 17-1, 17-2, a heating resistor layer 18 made of nichrome, a heat storage layer 19, and a substrate 20 having a good heat dissipation property such as alumina.

The ink 21 has a discharge orifice (fine pore) 2
2, the meniscus 23 is formed by the pressure P. Now, when an electric signal is applied to the electrodes 17-1 and 17-2, the area indicated by n of the heat generation head 15 rapidly generates heat, and bubbles are generated in the ink 21 in contact with the area, and the meniscus 23 is generated by the pressure. Is ejected, the ink 21 is ejected,
The recording droplets 24 are formed from the orifice 22 and fly toward the recording sheet 25. FIG. 3 shows an external view of a multi-head in which many heads shown in FIG. 1 are arranged. The multi-head is manufactured by closely contacting a glass plate 27 having a multi-groove 26 and a heating head 28 similar to that described in FIG. Incidentally, FIG. 3 is a cross-sectional view of the head 13 along the ink flow path.

In the present invention, the necessary image is formed on the ink receiving layer of the recording sheet by the ink jet method as described above, and the cationic substance is applied to the surface of the image. The cationic substance used in the present invention is more preferably a cationic polymer substance. Examples of these cationic polymer substances include, but are not limited to, polyallylamine hydrochloride, polyamine sulfone hydrochloride, polyvinylamine hydrochloride, chitosan acetate and the like. Further, it is not limited to the hydrochloride type and the acetate type. Further, a part of the nonionic polymer substance may be cationized.

Specific examples thereof include a copolymer of vinylpyrrolidone and a quaternary salt of aminoalkyl acrylate and a copolymer of a quaternary salt of acrylic amide and aminomethyl acrylic amide. Of course, these compounds It goes without saying that it is not limited to. The cationic polymer substance is satisfactory if it is water-soluble, but it may be a dispersion such as a latex or an emulsion. or,
The cationic substance used in the present invention has a molecular weight of 1,0.
When a low molecular weight substance having a molecular weight of 00 or less is used, by using a high molecular weight substance together with these, a more excellent effect of water resistance and moisture resistance of the image can be exhibited as compared with the case of using the above compound.

Specific examples of the low molecular weight cationic substance include primary to secondary to tertiary amine salt type compounds such as laurylamine, coconut amine and stearylamine.
A quaternary ammonium salt type compound such as a hydrochloride salt such as rosinamine, an acetate salt, etc., specifically, lauryltrimethylammonium chloride, lauryldimethylbenzylammonium chloride, benzyltributylammonium chloride, benzalkonium chloride, a pyridinium salt type compound, Specifically, cetylpyridinium chloride, cetylpyridinium bromide and the like, imidazoline type cationic compounds, specifically 2-heptadecenyl-hydroxyethylimidazoline and the like, ethylene oxide adducts of higher alkylamines, specifically dihydroxyethylstearylamine and the like. Can be mentioned.

Further, in the present invention, an amphoteric surfactant having a cationic property in a certain pH range can be used. More specifically, an amino acid type amphoteric surfactant, R-NH-CH ₂ -CH ₂ -C
OOH type compounds, betaine type compounds, specifically stearyl dimethyl betaine, carboxylic acid salt type amphoteric surfactants such as lauryl dihydroxyethyl betaine, and also amphoteric types such as sulfate ester type, sulfonic acid type and phosphoric acid ester type Examples thereof include surfactants. It goes without saying that the compounds that can be used in the present invention are not necessarily limited to these.

Specific examples of the polymeric substance that can be used in combination with the low molecular weight cationic substance include water-soluble polymers such as polyacrylic amide, polyvinylpyrrolidone and water-soluble cellulose, specifically carboxymethyl cellulose and hydroxymethyl cellulose. Examples include hydroxypropyl cellulose, polyvinyl methyl ether, polyvinyl acetal, polyvinyl alcohol, and the like, but it goes without saying that they are not limited thereto.

The method of applying the above-mentioned cationic substance to the image recording surface may be any method, but the following method is preferable. The first method is a method using a recording apparatus equipped with an inkjet recording head that discharges the above-mentioned cationic substance solution, and has an advantage that inkjet recording and application of the cationic substance can be performed at the same time. Furthermore, when this method is used, the cation substance is applied only to the pixels on which recording is performed, so that it is possible to minimize the amount of the cation substance used. Side effects such as yellowing can be minimized.

The second method is a method of applying an adhesive and / or a pressure-sensitive adhesive containing a cationic substance to the recording surface, in order to apply the cationic substance and to attach the notice sheet to the support. There is an advantage that the processing steps can be done at once. As the above-mentioned adhesive and / or adhesive, usable are starch paste and glue, which are conventionally known materials,
Or natural rubber type, modified rubber type, synthetic rubber type, polyacrylic ester type, cellulose type, polyvinyl acetate type, polyvinylpyrrolidone type, polyester type, polyvinyl ether, polyvinyl butyral, urethane type, acrylic type, epoxy type, Examples include silicon-based, melamine-based, and urea-based materials. In the present invention, these materials may be mixed with the above-mentioned cationic substance, or one of the above compounds having a cationic property may be used.

Particularly in the case of BPF, in the method of mixing a cationic compound in the coating liquid for forming the ink transport layer in advance by a conventionally known method, the ink droplets adhering to the ink transport layer are transferred to the ink holding layer side. There is a problem in that an image having a sufficient image density cannot be obtained when the image is observed from the surface of the base material as a result of not being sufficiently transmitted. In the present invention, such a problem does not occur. Is most effective.

The notice sheet of the present invention can be used as it is when it is used as a banner or a poster. When it is used for a signboard, an advertising tower, etc., it is used by being supported by glass, a plastic plate, or a building material. Examples of the method of supporting include a method of sandwiching between two acrylic plates and the like, and a method of attaching to the above-mentioned support. In particular, the one in which a cationic sizing agent is applied to the ink transport surface using BPF and attached to the support is
Since the dye itself is completely contained in the sheet material, it is the most preferable embodiment of the present invention in which the fading of the image and the flow due to water drops do not occur, and the dye does not exude.

[0028]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. In the text, “part” is based on weight unless otherwise specified. Example 1 A transparent polyethylene terephthalate film (thickness 100 μm; manufactured by Toray) was used as a substrate, and the following coating composition A was coated on the film with a blade coater so that the dry film thickness was 8 μm. Then, it was dried in a drying oven at 140 ° C. for 5 minutes. Further, the following coating composition B was applied thereto by using a blade coater so that the dry film thickness was 25 μm, and dried in a drying oven at 140 ° C. for 2 minutes to form an ink holding layer on the film. An ink receiving layer including an ink transport layer was formed.

Composition A Cationized polyvinyl alcohol (PVA-CM-318 manufactured by Kuraray) 1 part Blocked polyisocyanate (Elastron BN-5 manufactured by Dai-ichi Kogyo Seiyaku) 15 parts Reaction catalyst (Elastron Catalyst 64 manufactured by Dai-ichi Kogyo Seiyaku) ) 1 part water 1,000 parts

Composition B Urea formalin resin particles (Nippon Kasei) 100 parts Polyvinyl acetal (S-REC BX-1 Sekisui Chemical Co., Ltd.) 15 parts Block polyisocyanate (Elastron BN-5 Daiichi Kogyo Seiyaku Co., Ltd.) 3 parts Reaction catalyst (Elastron) Catalyst 64 manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd. 0.1 part Surfactant (Surflon 104 manufactured by Nisshin Chemical Co., Ltd.) 0.3 part Water / isopropyl alcohol mixture 800 parts

The following inks and cationic substance solutions were prepared and used for ink jet recording. The following components are mixed, and further filtered under pressure with a membrane filter (trade name; Fluoropore filter, manufactured by Sumitomo Electric Industries) having a pore size of 0.22 μm, and yellow, magenta, cyan and black inks (1) -Y, (1) -M, (1) -C,
(1) -K and a cationic substance solution were obtained.

(1) -Y C. I. Direct Yellow 86 2 parts Thiodiglycol 10 parts Acetylenol EH 0.05 parts Water balance (1) -M dye was added to C.I. I. Same composition as Example (1) -Y except that 2.5 parts of Acid Red-289 was used. (1) -C dye was used as C.I. I. Same composition as Example (1) -Y except that 2.5 parts of Acid Blue 9 was used. (1) -K dye was used as C.I. I. Same composition as Example (1) -Y except that it was replaced with 3 parts of Food Black-2. Cationic substance solution In place of the dye having the above ink composition, 1.5 parts of a cationic compound (benzyltributylammonium chloride, trade name BTBAC, manufactured by Sanyo Kasei) and a polymer compound (polyacrylamide, trade name Sunflock N-50) are used.
0.05 part (manufactured by Sanyo Kasei Co., Ltd.).

Next, using the sheet material and the ink obtained as described above, five ink jet type recording heads for ejecting ink droplets by the action of heat having recording nozzles at a rate of 14 per 1 mm are mounted. A color image was formed by the recording device. The four recording heads discharge the above ink, and the remaining one discharges the cationic substance solution. The apparatus used for recording is controlled so as to apply small droplets of the cationic substance solution to all the pixels to which each ink is applied. As described above, the bulletin board sheet 1 of the present invention was formed.

Example 2 A notice sheet 2 of the present invention was formed in the same manner as in Example 1 except that the following materials were used.
C. as raw material pulp S. F. To a mixture of 80 parts LBKP and 20 parts NBKP beaten to 430 ml, 10 parts kaolin (manufactured by Tsuchiya Kaolin), cationized starch 0.
4 parts, 0.2 parts of polyacrylamide (manufactured by Harima Kasei),
Further, 0.25 part of a neutral rosin sizing agent (Size Pine NT, manufactured by Arakawa Chemical Co., Ltd.) was blended, and weighed 130 g /
A recording base paper of m ² was produced. The following coating composition was applied to each of the above recording base papers by a bar coater method so that the dry coating amount would be 8 g / m ² to prepare a sheet material. Coating liquid composition Fine powder silica (Mizukasil P-78D, manufactured by Mizusawa Chemical Co., Ltd.) 15 parts Polyvinyl alcohol (PVA105, manufactured by Kuraray Co., Ltd.) 5 parts Water 80 parts

Example 3 After forming an image on the sheet material of Example 1 by ink jet recording, the following cationic substance solution was applied to the ink transport layer surface by air spray. Both sides of the obtained posting sheet were sandwiched between transparent acrylic plates having a thickness of 0.5 mm to obtain a posting display of the present invention. Solution composition Polyallylamine hydrochloride (trade name; PAA-HCl-10L, Nitto Boseki) 10 parts Water 90 parts

Example 4 After forming an image on the sheet material of Example 1 by ink jet recording, a mixture of the conventionally known acrylic adhesive and the cationic substance solution used in Example 1 was peeled off. After being applied to the release treated surface of the process paper and dried at room temperature, the pressure sensitive adhesive and the ink transport layer surface were thermocompression bonded, and the release paper was peeled off to apply the pressure sensitive adhesive to the ink transport layer surface. The above-mentioned sheet was attached to a transparent acrylic plate having a thickness of 2 mm by utilizing the sizing agent surface of the obtained posting sheet to obtain a posting display of the present invention. Comparative Example 1 A sheet for comparative example was prepared by forming an image on the sheet material of Example 1 by inkjet recording.

Comparative Example 2 A comparative notice sheet was obtained in the same manner as in Example 1 except that the following coating composition B was used. Composition B'Urea formalin resin particles (Nippon Kasei) 100 parts Polyvinyl acetal (S-REC BX-1 Sekisui Chemical Co., Ltd.) 8 parts Polyallylamine hydrochloride (trade name; PAA-HCl-10L, Nitto Koh) 6 parts Block poly Isocyanate (Elastron BN-5 manufactured by Dai-ichi Kogyo Seiyaku) 3 parts Reaction catalyst (Elastron Catalyst 64 manufactured by Dai-ichi Kogyo Seiyaku) 0.1 part Surfactant (Surflon 104 manufactured by Nisshin Chemical Co., Ltd.) 0.3 part Water / isopropyl alcohol 800 parts of mixture

The recorded image was evaluated by the following method. 1. Image density A solid image with a duty of 100% was formed with black ink, and the reflection densitometer after standing for 12 hours was measured with a reflection densitometer Macbeth RD-918 (manufactured by Macbeth). 2. Water resistance A drop of water was dropped on a character of 100% duty with a dropper, and the sample was naturally dried and visually evaluated. The case where the image flow did not occur but the characters were thickened was marked with ◯. In particular, ⊚ indicates that the flow of images does not occur and the characters do not become thick. Other levels were marked as x.

3. Moisture resistance The printed matter was left in an environment of 35 ° C / 90% RH for 14 days, and the image after standing was visually evaluated. Characters that were thick but were legible were marked with a circle. In particular, those with no thickening of letters are marked with ⊚. In addition, when the character weight was extremely unreadable, it was marked with x. 4. Lightfastness Printing a magenta solid image using the recording device,
As an accelerated test for evaluating the light resistance of the printed matter, a xenon lamp light was set to 1 using an Atlas Fade Meter Ci-35.
The ratio between the image density after irradiation of the printed matter for 00 hours and the image density before irradiation was determined. The larger the ratio, the better the light resistance.

Table 1

[0041]

According to the present invention as described above, there is provided a notice sheet having a clear and high-definition pattern for forming a pattern by using a color ink jet recording system.
Further, according to the present invention, since the pattern is formed by transmitting the image signal from the controller of the ink jet recording head directly to the recording head to perform recording, even if the pattern is an original design of a small lot, It can be provided simply and at low cost. Further, the posting sheet of the present invention has image fastness equivalent to that of a conventional sheet.

[0042]

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a head of an inkjet recording apparatus.

FIG. 2 is a cross-sectional view of a head of an inkjet recording device.

FIG. 3 is an external perspective view of a head in which the head shown in FIG. 1 is multi-headed.

[Explanation of symbols]

 13: Head 14: Ink Groove 15: Heating Head 16: Protective Film 17: Aluminum Electrode 18: Heating Resistor Layer 19: Heat Storage Layer 20: Substrate 21: Ink 22: Discharge Orifice (Fine Hole) 23: Meniscus 24: Recording Liquid Droplet 25: Recording material 26: Multi-groove 27: Glass plate 28: Heating head

Front page continued (72) Inventor, Eiichi Suzuki, 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Masato Katayama, 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (9)

[Claims] 1. A bulletin board sheet comprising a sheet material comprising a plastic base material and an ink receiving layer, and a cationic substance applied thereto after ink jet recording. 2. The posting sheet according to claim 1, wherein the sheet material is a sheet material including a transparent ink holding layer and an opaque ink transport layer which are sequentially provided on a base material. 3. The bulletin board sheet according to claim 1, wherein after the ink jet recording, a pressure-sensitive adhesive and / or an adhesive containing a cationic substance is applied to the recording surface. 4. A sheet material comprising a plastic base material and an ink receiving layer, after ink jet recording is carried out,
A method for producing a posting sheet, which comprises adding a cationic substance. 5. The method for producing a posting sheet according to claim 4, wherein the sheet material is a sheet material including a transparent ink holding layer and an opaque ink transport layer which are sequentially provided on a base material. 6. A recording device equipped with a recording head for ejecting a solution of a cationic substance in addition to the recording head for ejecting the ink, and after applying a small droplet of the ink to the sheet material, the cationic substance is further added. 5. A droplet of solution is applied.
The manufacturing method of the bulletin board of any one of--5. 7. The method for producing a posting sheet according to claim 4, wherein after the ink jet recording is performed, a pressure-sensitive adhesive and / or an adhesive containing a cationic substance is applied to the recording surface. 8. The method of producing a bulletin board sheet according to claim 4, wherein the ink jet recording method is to apply an ink containing a water-soluble dye containing at least an anionic group. 9. The notice sheet according to claim 1,
A display for posts, which is supported by glass, plastic or building material.