JPS6032663B2 - recording medium liquid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording medium liquid for recording by ejecting it from an ejection port provided in a recording head and flying it around as droplets.

The non-impact recording method has the advantage of generating little noise during recording, and has been actively researched recently.

Among these, the so-called inkjet recording method, which enables high-speed recording and can record on so-called plain paper without the need for special fixing processing, is an extremely powerful recording method, and various methods have been used to date. Some methods have been devised, improved and commercialized, and others are still being worked on to put them into practical use. In this inkjet method, a recording medium liquid called ink is formed into droplets.
It is recorded by flying it around as a stream and attaching it to the recording department village.

Such a recording medium liquid is usually prepared by dispersing or dissolving recording agents made of various dyes or pigments in a liquid medium such as water or an organic solvent. Various methods have been proposed for such recording methods, depending on the method of generating droplets of the recording medium liquid or the method of controlling the spraying direction of the direct flow of the recording medium liquid.

In either method, physical properties such as viscosity, surface tension, and electrical conductivity are required for the recording medium liquid used, depending on the method of generating droplets and the method of controlling the direction of droplet flight. be done. As an example of a device used for such a recording method,
For example, FIG. 1 shows an apparatus that performs recording by applying a recording signal to a recording head having a piezo vibrator and generating a droplet flow of recording medium liquid in response to the signal.

In FIG. 1, 1 is a recording head, and a piezo vibrator 2a
, diaphragm 2b, recording medium liquid inlet 3, chamber 4 in the head
and a discharge port (discharge orifice) 5. Incidentally, in order to improve the recording speed, a plurality of recording heads as described above may be provided. A recording medium liquid 7 stored in a storage tank 6 is supplied into the chamber 4 through a supply pipe 8a. In some cases, an intermediate means 9 such as a pump or a filter may be provided in the middle of the supply pipe 8a. A pulse-converted recording signal is applied between the piezo vibrator 2a and the diaphragm 2b by a signal processing means (for example, a pulse converter), and the recording medium liquid in the chamber 4 is A pressure change occurs. As a result, the recording medium liquid 7 is discharged from the discharge orifice 5 in the form of droplets 11, and recording is performed on the surface of the recording member 12. Incidentally, among the apparatuses used in such a recording method, there are various modified types in which the number and shape of the chambers 4 or the installation location of the piezoelectric vibrator 2a is changed. Furthermore, in Fig. 2, recording medium droplets are continuously generated, the droplets are charged according to the recording signal, and then the flying direction is controlled by a deflection electrode (to which a uniform electric field is applied). The device for performing the recording is shown.

Note that in this apparatus, a portion of the recording medium liquid that is not used for recording is collected and reused. In Figure 2, 1
~12 and S symbols indicate the same as in Figure 1, while 8
13 is a pulse oscillator for generating recording medium liquid collection; 14 is an electrode for charging recording medium droplets; 15 is a deflection electrode;
6 is a power supply, 17 is a recording medium droplet used for recording, 18 is a recording medium droplet not used for recording, 19 is a collection gutter,
This is a collection storage tank for two rivers of collected recording medium liquid.
In addition to the above-mentioned system, there is also known an apparatus that generates droplets by applying a recording signal in the form of heat to the recording medium liquid in the recording head. In any of these recording methods, the recording medium liquid is required to have various characteristics in order to perform recording faithfully to the recording signal. That is, first, the recording medium liquid has physical properties (such as viscosity, surface tension,
electrical conductivity, etc.).

The recording medium liquid is required not to change in quality during the storage period or during the recording suspension period. When the recording medium liquid deteriorates, for example, solid matter is generated or physical property values adjusted to desired values at the time of compounding change, which tends to adversely affect ejection stability, responsiveness, and long-term continuous recording performance. Furthermore, in addition to satisfying the above conditions, it is also important that the recorded image formed by the recording medium liquid has high density and has water resistance, light resistance, and abrasion resistance. Alternatively, recording medium liquids are also required to provide high quality recorded images on a wide variety of recording members. Many of the conventional recording media liquids provide high-quality recording for recording members made of specific materials (e.g., highly absorbent paper, high-quality paper, coated paper, plastic, or metal surfaces). However, if the material of the recording member is changed, the quality of the recorded image tends to deteriorate. However, it is quite difficult to obtain a recording medium liquid that meets all of the above conditions, and there is a strong desire to develop a practical recording medium liquid that satisfies all of these conditions.

Therefore, in view of the above points, it is an object of the present invention to provide an excellent recording medium liquid that simultaneously satisfies the above conditions. The present invention, which achieves these objects, is a recording method that uses a liquid medium and a recording agent as its main components, and is used in a recording method in which a liquid medium and a recording agent are ejected from an ejection port provided in a recording head, and the liquid is flung around as a liquid bottle. The recording medium liquid is characterized in that the medium liquid contains latex. however,
Latex is a type of colloidal solution in which components such as rubber and resin are dispersed in water in the form of fine particles (approximately 0.01 to several particles) using an emulsifier.Recording media containing latex in this way The liquid is such that the resulting recorded image exhibits remarkable water resistance, light resistance, and abrasion resistance without degrading storage stability, device maintainability, ejection stability, ejection response, continuous recording performance, etc.

Furthermore, compared to conventional recording medium liquids, high quality recording can be performed on a wider variety of recording members. The recording medium liquid of the present invention is prepared by containing a liquid medium and a recording agent as main components, and containing latex as a resin component.

Hereinafter, specific components used in the present invention will be explained while illustrating them. Liquid Medium The liquid medium used in the recording medium liquid of the present invention may be any liquid medium commonly used in this recording field.

Specifically, water or the following non-aqueous liquid medium may be used. For example, methyl alcohol, ethyl alcohol, n
-Propyl alcohol, isof.

Alkyl having 1 to 10 carbon atoms such as propyl alcohol, n-butyl alcohol, sec-butyl alcohol, te-butyl alcohol, isobutyl alcohol, benzyl alcohol, hexyl alcohol, heptyl alcohol, octyl alcohol, nonyl alcohol, decyl alcohol, etc. Alcohol; For example, hydrocarbon solvents such as hexane, octane, cyclobentane, benzene, toluene, xylol; Halogenated hydrocarbon solvents such as carbon tetrachloride, trichloroethylene, tetrachloroethane, dichlorobenzene; Chyl ether, butyl ether,
Ether solvents such as ethylene glycol diethyl ether and ethylene glycol monoethyl ether; for example, acetone, methyl ethyl ketone, methyl propyl ketone,
Ketone solvents such as methyl amyl ketone and cyclohexanone; Ester solvents such as ethyl formate, methyl acetate, propyl acetate, phenyl acetate, and ethylene glycol monoethyl ether acetate; Alcohol solvents such as diacetone alcohol; petroleum carbonization Examples include hydrogen solvents. These enumerated liquid media are appropriately selected and used so as to satisfy the compatibility with the recording agent and additives used and the above-mentioned properties as a recording medium liquid. If necessary, two or more types may be mixed and used as long as a recording medium liquid having the following characteristics can be prepared.

Further, preferable results can also be obtained by mixing these non-aqueous liquid media with water under the above conditions. In the above liquid medium,
Water/alcohol-based liquid media are preferred in consideration of pollution, ease of availability, and ease of preparation.

Recording agent The recording agent used in the present invention is appropriately selected depending on the recording member to suit the recording conditions thereof, and many conventionally known dyes and pigments can be used. It is valid.

For example, in addition to direct dyes, basic dyes, acid dyes, soluble vat dyes, acidic medium dyes, medium dyes, sulfur dyes, architectural dyes, alcohol twill dyes, oil-soluble dyes, disperse dyes, etc. Dyes, naphthol dyes, reactive dyes, chromium dyes, 1
: Type 2 rust salt dye, 1:1 type rust salt dye, Azozyk dye,
Cationic dyes, etc.

Specifically, the following can be mentioned. Sumilight Splat Red, Violet RL
(C.1.25410) Suminol First Black BR Conch Direct Brilliant
Full RW (C.1.24
280) Suminite Black G Conch
(C.1.35255) Japanol First Black D Conch
(C.1.27700) Direct First
Black B 160% Direct Deep Black XA (and above Sumitomo Chemical) Powerful Splat Orange Book L
(C.1,40215) Kayarasu Spra Violet $L Conch
(C.1.29125) Kayarasu Spra Flu F
FRL (C.1.5
1300) Kayaras Splat Gray VGN
(C.1.25040) Kayaras Black G Conch
(C.1.35255) Power Yak Direct First Black Conch Kayak Direct Deaf.

Black XA Kayaku Direct Subsurface Black AXN (Nippon Kayaku) Diacotton First Black D (C.1
．． 27700) Direct First Black B
160% Direct First Black BR Direct First Black AB
(C.1.35440) Direct First Black Conch (
C. 1.27720) Dialuminos Rubin B
(C.1.2922
5) Dialuminos Brown G Conch
(C.1.36200) Diacapro Green G
(C.1.34040) (Mitsubishi Chemical Industries) Chikara Yasil Yellow GG
(C.1.18965) Powerful Acid Orange D (C
．． 1.15510) Power Yasir Rupee / Rupee 30S
(C.1.17
045) Power Yanor Full BL
(C.1.50315) Kayanor Milling Brown 4GW
(C.1.10410) Kayanor Milling Black Vre G
(C.1.27070) (Nippon Kayaku) Suminol First Yellow R Conch
(C.1.18835) Solar Fast Red ya (C.1.18
050) Suminol First Red B Conch
(C.1.14 Spot 0) Suminol Leveling Red Song L Extra Conch
(C.1.17065) Suminol Leveling
Blue 4GL (C.1
．． 61125) Sumiran Green BL
(C.1.13425
)Assisted Flu Black
(C.1.20470) Diacid
Light Tie o- Book P
(C.1.18900) Diacid First Red Momme 130% (C.1.14
690) Diamond light green GS160
% (C.1.61570) Alizarin Light Brown BLI90%
(C.1.66710) Diamond First Black BR Conch
(C.1.17580) (Mitsubishi Chemical Industries) Acid Violet Yui
(C.1.42640) (Hodogaya Chemical Industry) Orient Solible Blue OBC
(C.1.42755) Orient Nigrosine BR, OZ
(C.1.50420) Water Black
R-455 (Orient Chemical Industry) Crampons Cachiron Yeo- Approximately LH
(C.1.48055) Crampons Cachiron Pink FGH
(C.1.48015) Crampons Malachite Green (C.1.4
2000) (Hodogaya Chemical Industry) Sumia Acrylic Orange G (C
．． 1.48035) Sumia acrylic red string
(C.1.48020
) Methylene Blue Conch
(C.1.52015) Smear acrylic plaque G (C
．． 1.11825) (Sumitomo Chemical Industries) Orient Basic Magenta
(C.1.42510) (orient chemical industry) diacrylic splat red bra one 20 diacrylic black BSL-F (mitsubishi chemical industry) suncromine yellow MD120%
(C.1.14095) Sancromine First Yellow KE Conch
(C.1.1871o) Sunchromine Orange G
R (C.1.26
520) Sancromin Green LG Conch
(C.1.17225) Sancromine Prawn EB Conch
(C.1.20110) Sancromine Black PBB Extra Conch (
C. 1.16505) Sunchrome Black ET
Conch (C.1.1464
5) (Sumitomo Chemical Industries) Mitsui Alizarin B
(C.1.5
8000) Mitsui Chrome Brilliant Violet RX (C.1.43565) Mitsui Anthracene Flue SWGG (
C. 1.5 machine 05) Mitsui Chrome First Brown KE (C.1.1487
0) Mitsui Chrome Full Black BC
(C.1.15705) (and above)
Mitsui Toatsu Chemical) Eisen Chrome Piyua Blue
BH (C.1.43830
) Crampons Chrome Brown PGH
(C.1.17590) Crampons
Chrome Black AH
(C.1.15710) (Hodogaya Chemical Industry) Chikarayaron First Yellow G
(C.1.11855) Chikara Yaron First Orange GR
(C.1.11005) Power Yaron Fast Red R (C.1.112
10) Chikara Yaron First Violet BR
(C.1.62030) Chikara Yaron First Furichi FN
(C.1.61505) Chiyaron Polyester Yellow YLF Paste (C.
1.12790) Power Yaron First Black G
G-Riki Yaron Polyester Orange BF Paste (Nippon Kayaku) Miketon Discharge Yellow (C.1.12770
) Miketon First Scarlet B
(C.1.11110) Miketon First Pink FR (
C. 1.11135) Miketon First Red
Violet R (C.1.6110
0) Miketon First Blue FFB
(C.1.62035) Miketone
polyester brown sphere
(C.1.11100) Miketazole Platz B
SF, Paste (Mitsui Toatsu Chemical) Diaceritone First Orange RM/○ (
C. 1.11080) Diaceritone First Rubin $M/D (C.1.1121
5) (Mitsubishi Kasei and above) Sumikalon Yellow 5G,
Liquid (C.1.1
2790) (Sumitomo Chemical Industries) Procion Brilliant Yellow (C.
1.18972) Mikasion Rubin BS
(C.1.179
65) Mikasion Brilliant Blue-RS
(C.1.61205) Procion Black H-G (Nippon Kayaku) Diamira Golden Yeo-G
(C.1.18852) Mikasion Brilliant Orange GS (
(C.1.17907) (Mitsubishi Kasei) Sumifix Brilliant Blue R
(C.1.61200) (Sumitomo Chemical), etc.

These dyes are appropriately selected as desired and used after being dissolved or dispersed in a liquid medium.

Pigments that can be effectively used in the present invention include many inorganic and organic pigments. Specific examples of such pigments include inorganic pigments such as cadmium sulfide, sulfur, selenium, zinc sulfide, cadmium sulfoselenide, yellow lead, zinc chromate, molybdenum red,
Guinea green, titanium white, zinc hatake, begara, chromium oxide green, red lead, cobalt oxide, barium titanate, titanium yellow, iron black, dark blue, litharge, cadmium red, silver sulfide, lead sulfate, barium sulfate, Examples include ultramarine blue, calcium carbonate, magnesium carbonate, white lead, cobalt violet, cobalt blue, emerald green, and carbon black.

Most of the organic pigments are classified as dyes, which overlap with dyes in many cases, but specifically, the following are preferably used in the present invention.

a Non-fusible azo type (naphthol type) Brilliant Carmine BS, Lake Carmine FB, Brilliant First Scarlet, Lake Red 4R,
Paralleled, Permanent Red R, Fast Stretched FGR, Rake Bolt SB, Vermilion No. 1,
Vermilion No. 2. Toluidine Maroon b Insoluble azo type (anilide type) Diazo Yellow, Fast Yellow G, Fast Yellow 103, Diazo Orange, Vulcan Orange, Pyrazolone Red c Soluble Azo type Lake Orange, Brilliant Carmine 3B, Brilliant Carmine Mother B, Brilliant Scarlet G, Lake Red C, Lake Red D, Lake Red R, Watching Red, Lake Vold-lqB, Bonmaroon L
, Bon Maroon Md Phthalocyanine Flu, First Sky Blue, Phthalocyanine Green e Dye Lake Yellow Lake, Eosin Lake, Rose Lake, Violet Lake, Blue Lake, Green Lake, Sepia Lake f Liang Alizarin Lake, Madder Carmine G Jianliang Industhrene series, First Blue Lake (GGS)
h Basic dye lake system Rhodamine Lake, Malachite Green Lake i Acidic dye lake system Fast Sky Blue, Quinoline Yellow Lake, Quinacridone system, Dioxazine system The content of these recording agents is based on the total weight of the recording medium liquid. , in weight percent from 50% to 0.5%, preferably from 40% to 0.5%, and more preferably from 30% to
It is preferable to set it in the range of 1%.

As the recording agent, it is preferable to use a recording agent that is soluble in the liquid medium, but even if the recording agent is dispersible or soluble in the liquid medium, the particle size of the recording agent when dispersed in the liquid medium may vary. can be used if it is made small enough.

In this case, the grain size of the samurai agent is usually in the range of 3 to 0.01 Buddha, preferably 2 to 0.01 Buddha, and more preferably 1 to 0.01 Buddha. Furthermore, it is preferable that the grain size distribution of the dispersed records be as narrow as possible. Latex The recording medium liquid of the present invention contains latex as a resin component added to the above-mentioned liquid medium and recording agent.

Generally, latex is a type of colloidal solution typified by natural rubber latex, and is formulated so that its total solid content concentration is approximately 30 to 80%. Such latex is classified into natural rubber latex, synthetic rubber latex, and synthetic resin latex depending on the types of components dispersed in water. In the present invention, among the latexes mentioned above, synthetic rubber latex and synthetic resin latex can be preferably used. Specific examples of synthetic rubber latex include the following.

For example, [1'styrene-butadiene copolymer latex (2-acrylonitrile-butadiene copolymer latex'3)
}Polychloroprene latex (4) Pynylpyridine-styrene-butadiene latex (5-butyl rubber latex '6) Polybutadiene latex '7} Polyisoprene latex Shelf polysulfide rubber latex, etc.

On the other hand, examples of synthetic resin latex include the following.

For example, (9) Acrylic ester latex (1■ Styrene-butadiene resin latex (1
1) Henylacetate-based latex, (12) Vinyl chloride-based latex, (13) Vinylidene chloride-based latex, and the like.

Among these latexes, (1), [21,'3},
(5','9}, (11), (12) or (13)
etc. can be preferably used.

These latexes may be used either singly or in combination of two or more selected as desired and added to the mixture consisting of the liquid medium and recording agent described above.

The quantitative relationship of latex in the recording medium liquid in the present invention is as follows:
0.1% to 9% by weight based on the total recording medium liquid
7%, preferably 10% to 80%, more preferably 10%
It is desirable to set it as the range of % to 50%.

The recording medium liquid of the present invention constructed as described above satisfies all the conditions required for this type of recording medium liquid. That is, since it is difficult to generate solid content or change physical property values, it is not only excellent in storage stability and maintainability of the device, but also in ejection stability, responsiveness, and continuous recording performance. In addition, as a result of the latex component effectively acting as a binder for the recording agent, it not only significantly improves the water resistance, light resistance, and abrasion resistance of recorded images, but also improves the water resistance, light resistance, and abrasion resistance of recorded images compared to conventional recording medium liquids. High quality recording can be performed on a wider variety of recording members. The recording medium liquid of the present invention is prepared using the liquid medium, recording agent, and latex as basic components as described above, but various additives may be added as desired in order to provide even more remarkable recording characteristics. May be added. For example, polyalkylene glycol, glycerin, diethylene glycol, or the like may be used as a wetting agent. Also, viscosity modifier, surface tension modifier, PH
A regulator, an electrical conductivity regulator, etc. may be added. or,
The recording medium liquid of the present invention can be applied not only to devices used in recording methods as shown in FIGS. 1 and 2, but also to various inkjet devices by adding appropriate components to give necessary physical properties It may be used in recording devices.

For example, as shown in FIG. 3, there is a device in which the chamber 4 is shaped like a nozzle as a modification of the device in FIG. The present invention may also be used in a recording apparatus that applies a recording signal in the form of heat to a recording medium liquid in a recording head to eject droplets. The present invention will be specifically explained with reference to the following examples.

Example 1 1 Take deionized water 58 acids in a beaker, then emulsify a pinylidene chloride-vinyl chloride copolymer (vinylidene chloride 50%) with a particle size of 0.1 to 0.2 in the water with fatty acid soap. Vinylidene chloride latex (total solids 50%)
) I dripped it on 10 females while worshiping them.

After that, 30 g of ethylene glycol was added and stirred thoroughly, and further 15 g of Sumilite Black G Conch (manufactured by Sumitomo Chemical, C.1.35255) was added and stirred thoroughly.

Next, apply the above mixed solution to a Fluoropore filter with a pore size of 5 mm (
The solution was subjected to pressure filtration to remove solid impurities from the solution to obtain a recording medium liquid (A-1). Next, recording was performed on high-quality paper using the recording medium liquid (A-1) using the recording apparatus shown in FIG. The properties and abrasion resistance were investigated.

As for recording performance, the drive voltage is 200V and the drive frequency is 10V.
The ejection stability, responsiveness, and continuous recording performance were examined when a recording signal was applied under KHz recording conditions.

Regarding the water resistance of the recorded image, water was dropped on the recorded image 10 minutes after recording, and quality was judged based on whether or not the image dots were discolored.

For light resistance, use a fade meter 2. Changes in image density were observed after irradiation for 30 years using a bulb WXe lamp.

Abrasion resistance was determined by repeatedly rubbing the recorded image two ships after the recording was made with a 2 cm square piece of absorbent cotton under a load of 1 kg, and by the number of times the image was rubbed until the image became distorted.

As a result, as shown in Table 1, the recording medium liquid (A
-1) was found to be extremely excellent in recording properties, water resistance, light resistance, and abrasion resistance of recorded images. Next, for comparison, the vinylidene chloride latex was removed from the recording medium liquid (A-1), and using a recording medium liquid (A-2) prepared in the same manner as in (A-1), the above We conducted the same study as in the example above. The results are shown in Table 1. Example 2 1. Take 28 g of deionized water in a beaker, and then add styrene-butadiene copolymer (with a particle size of 0.05 to 0.2 mm).
A styrene-butadiene copolymer latex (total solids content: about 60%) prepared by emulsifying styrene (25% styrene) in water with fatty acid soap was added dropwise to 10 females in increasing frames.

Thereafter, 500 g of diethylene glycol was added to sufficiently dry the mixture, and further, 2 female diacrylic black BSL-F (manufactured by Mitsubishi Kasei) was added to thoroughly harden it.

Next, the above strained mixture was filtered in the same manner as in Example 1 to obtain a recording medium liquid (B-1). The recording medium liquid (B-1) was recorded on coated paper using the recording device shown in FIG. The properties were investigated in the same manner as in Example 1.

The recording conditions are a drive voltage of approximately 60V and a drive frequency of 10K.
It was Hz.

As a result, as shown in Table 1, the recording medium liquid (B-1) was excellent in all properties, particularly in recording performance and abrasion resistance. Example 3 Recording medium liquid (C-
1) was prepared in the same manner as in Example 1.

Thereafter, recording was performed using the recording medium liquid (C-1) on high-quality paper using the apparatus shown in FIG. 2 (discharge orifice size 60 mm), and the same study as in Example 1 was conducted.

The recording conditions were a driving frequency of 5 Hz and a charging voltage of 0.
-300V, deflection voltage unevenness V.

As a result, excellent results were obtained as shown in Table 1. Example
4 A recording medium liquid (D-1) having the following composition was prepared in the same manner as in Example 1, and the same study as in Example 1 was carried out.As shown in Table 1, the medium liquid (D-1) Good results were also obtained.

Example 5 A recording medium liquid (E-1) having the following composition was prepared in the same manner as in Example 1, and then tested in the same manner as in Example 1. As a result, good results were obtained as shown in Table 1. .

Example 6 Instead of the vinyl chloride latex of Example 5, particle size 0
．． The same procedure as Example 5 was used except that an acrylonitrile-butadiene copolymer latex (total solid content 50%) was used, which was obtained by emulsifying a 05-0.2 French acrylonitrile-butadiene copolymer (acrylonitrile 25%) with fatty acid soap. A recording medium liquid (F-1) was prepared in the same manner, and the same study as in Example 5 was conducted.

Good results were obtained as shown in Table 1. Example 7 A recording medium liquid (G-1) having the following composition was prepared in the same manner as in Example 1 and used for recording.

The recording device includes a glass chamber (nozzle) having a discharge orifice (approximately 50A) for discharging recording medium liquid, and an electrothermal converter ( Recording was carried out using a device (ondemaud type) having a recording head (nozzle density: 10 nozzles/sail) consisting of a heating element) and under the conditions of a driving voltage of 15 V and a speed of 200 seconds, as shown in Table 1. Very good results were obtained.

Example 8 Instead of the polyvinyl acetate latex of Example 3, styrene-butadiene copolymer (40% styrene) with a particle size of 0.1 to 0.3 mm was emulsified with fatty acid soap. En resin latex (total solids 48%) 100
The recording medium liquid (
H-1) was prepared.

After that, Example 2 was prepared for the recording medium liquid (H-1).
When similar studies were conducted, good results were obtained as shown in Table 1. Example 9 Recording medium liquids (1-1) having the following compositions were prepared according to the same procedure as in Example 1.

Thereafter, the recording medium liquid (1-1) was examined in the same manner as in Example 3, and as shown in Table 1, good results were obtained.

Example 10 When the recording medium liquid (C-1) was recorded on an acrylic resin in the same manner as in Example 2, the recorded image obtained had excellent water resistance, light resistance, and abrasion resistance. Ta.

The results are shown in Table 2.

Next, for comparison, a recording medium liquid (C-2) was prepared in the same manner as in (C-1) except that the vinyl acetate latex was removed from the recording medium liquid (C-1). The same study as above was conducted using this method. The results are shown in Table 2. Example 11 When recording was performed on an aluminum slope using the recording medium liquid (D-1) in the same manner as in Example 1, good results were obtained as shown in Table 2.

For comparison, the recording medium liquid ((D-2) was prepared in the same manner as in (D-1) except that the latex was removed from the recording medium liquid (D-1).
was prepared, and the same study as above was conducted using the medium solution.

The results are shown in Table 2. Table-1 Table-2 Shibu) 1. Water resistance: ○; no blemish, ×; blemish, astringent) 2.
Light resistance: ○: No change in density, ×: Significant decrease in density *) 3
．． Abrasion resistance: The higher the number of repetitions, the better.

[Brief explanation of drawings]

FIG. 1, FIG. 2, and FIG. 3 are schematic diagrams of the recording device. However, in the figure, 1...recording head, 2a...piezo vibrator, 2b...diaphragm, 3...inlet, 4...
Chamber, 5...Discharge orifice, 6...Storage tank, 7
... Recording medium liquid, 8a ... Supply pipe, 8b ... Recovery pipe, 9 ... Intermediate cutting, 10 ... Signal processing means, 11
...Liquid bottle, 12...Recording unit village, 13...Pulse oscillator, 14...Charging electrode, 15...Deflection electrode, 1
6... Power source, 17... Droplet to be recorded, 18...
Droplets not recorded, 19...Gutter, 20...Recovery storage tank, S...Record signal. Younger brother l figure 2 admiring figure

Claims (1)

[Claims] 1. A recording medium liquid used in a recording method in which recording is performed by ejecting liquid from an ejection port provided in a recording head and making the liquid fly as droplets, which is characterized by containing latex. recording medium liquid. 2. The recording medium liquid according to claim 1, wherein the latex is a synthetic rubber latex. 3. The recording medium liquid according to claim 1, wherein the latex is a synthetic resin latex. 4 The content of the latex relative to the recording medium liquid is
The recording medium liquid according to any one of claims 1 to 3, which has a weight percentage of 0.1% to 97%. 5. The recording medium liquid according to claim 2, wherein the synthetic rubber latex is selected from styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, polychloroprene latex, and butyl rubber latex. 6. The recording medium liquid according to claim 3, wherein the synthetic resin latex is selected from acrylic ester latex, vinyl acetate latex, vinyl chloride latex, and vinylidene chloride latex.