JP2006028490A - Inkjet recording water-based ink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recording water-based ink using C.I. direct yellow 132, by which good long-term storage stability is realized even at the time of water evaporation of an ink and at low temperature. <P>SOLUTION: The inkjet recording water-based ink comprises (a) 0.1 wt.% to 4.0 wt.% C.I. direct yellow 132, (b) 0.5 wt.% or more glycol ether with a melting point of -45°C or less, and (c) an water-soluble organic solvent wherein the solubility of C.I. direct yellow 132 is 5% or higher at 20°C. The inkjet recording water-based ink satisfies conditions of 0.2≤[B/A] and 3≤[C/A], where A denotes the weight of the component (a), B denotes the weight of the component (b), and C denotes the weight of the component (c) contained in the ink. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an aqueous ink for inkjet recording.

  Inkjet recording methods include electrostatic attraction method, a method of applying mechanical vibration or displacement to ink using a piezoelectric element, etc., a method of generating bubbles by heating the ink, and a method of using the pressure at that time In both cases, ink droplets are formed and recorded on a recording material such as paper.

  As an ink used in such an ink jet recording system, an aqueous ink in which various dyes or pigments are dissolved or dispersed in water or a liquid medium composed of water and a water-soluble organic solvent is used.

  In order to obtain a good recorded image over a long period of time in an inkjet recording method, (1) the ink characteristic values (viscosity, surface tension, density, etc.) are appropriate values, (2) the nozzles of the recording device, In order to prevent clogging at the orifice and to obtain ejection stability, there should be no deposits in the ink due to heat, etc., or the physical properties of the ink will not change, (3) the recorded image will be water resistant, light resistant, etc. In addition, (4) In order to achieve good print quality without ink bleeding on plain paper without using inkjet special paper, the nozzle diameter of the recording head of the inkjet printer is reduced. There is a demand to narrow the ink droplets to be discharged and to make them smaller.

  However, if the nozzle diameter of the recording head is reduced, foreign matter may be mixed in or generated in the narrow ink flow path inside the head nozzle and the head when the ink cartridge is left in the ink jet printer for a long period of time and then used again. , The ink cannot pass smoothly, and ejection failure occurs. In particular, as a yellow ink colorant, C.I. I. This problem is likely to occur when direct yellow 132 is used.

  Regarding this problem, C.I. I. By increasing the amount of moisturizing agent such as diethylene glycol added to ink jet recording yellow ink using Direct Yellow 132, preventing dye precipitation at the time of water evaporation and low temperature, or by using benzotriazole It has been proposed to suppress changes in ink physical properties (Patent Document 1).

Japanese Patent No. 3089665

  However, in the conventional water-based ink for ink jet recording, the method of increasing the amount of wetting agent added to prevent the precipitation of the dye increases the viscosity of the ink, and the optimum viscosity cannot be obtained. In addition, at the time of high temperature and drying, there is a problem that the periphery of the nozzle of the ink head is particularly easy to dry, and if the dye is deposited from the ink attached to the periphery of the nozzle, it is not easy to remove. This problem is particularly serious in warm regions. Recent ink jet printers have a wiper that wipes the head surface, but once the dye is deposited and solidifies, it cannot be removed by the wiper. In addition, when the ink cartridge is transported or stored, the cartridge may be placed in a low temperature environment. In such a case, the dye may be precipitated from the ink. In the conventional technique, it is difficult to simultaneously solve the problem of dye precipitation after moisture evaporation and the problem of dye precipitation at a low temperature. That is, it is difficult to prevent dye precipitation at low temperatures even though dye precipitation after moisture evaporation can be prevented. Or, conversely, although dye precipitation at low temperatures can be improved, it is difficult to prevent dye precipitation after evaporation. C. has solved these two problems simultaneously. I. As far as the present inventor is aware, there is no water-based ink for ink-jet recording using Duct Yellow 132.

  The present invention has been made to solve the above-described problems. I. An object of the water-based ink for ink jet recording using the direct yellow 132 is to prevent long-term storage stability without dyes being deposited from the ink even when the ink is evaporated or at low temperatures.

  We have described C.I. I. In the water base ink for inkjet recording using Direct Yellow 132, a specific water-soluble organic solvent and a specific glycol ether are used, and I. It has been found that the above object can be achieved by using a specific weight ratio with respect to Direct Yellow 132.

The following components (a) to (c):
(A) C.I. I. Direct Yellow 132 0.1 wt% to 4.0 wt%;
(B) a glycol ether having a melting point of −45 ° C. or lower, 0.5% by weight or more; and (c) C.I. I. A water-based ink for ink-jet recording containing a water-soluble organic solvent having a solubility of direct yellow 132 of 5% or more, wherein the following (I) and (II)

(In the formula, A represents the composition weight of the component (a) contained in the ink, B represents the composition weight of the component (b), and C represents the composition weight of the component (c). Therefore, [B / A ] Represents the weight ratio of component (b) to component (a) contained in the ink, and [C / A] represents the weight ratio of component (c) to component (a) contained in the ink.)
An aqueous ink for ink-jet recording is provided.

  In the water-based ink for inkjet recording of the present invention, C.I. I. The direct yellow 132 contains glycol ether having a melting point of −45 ° C. or lower at a predetermined ratio, so that the melting point of the ink is lowered. I. Low temperature precipitation of direct yellow 132 can be prevented.

  Furthermore, C.I. I. For direct yellow 132, C.I. I. Since the direct yellow 132 contains a water-soluble organic solvent having a solubility of 5% or more, it is possible to prevent dye precipitation during evaporation of water.

  Therefore, according to the present invention, as a colorant for water-based ink for ink jet recording, C.I. excellent in color reproducibility and color developability in an ink jet recorded image. I. Direct yellow 132 can be used regardless of the environment in which the ink jet printer is used and changes thereof.

  Hereinafter, the present invention will be described in detail.

  The water-based ink for ink-jet recording of the present invention includes C.I. I. Direct yellow 132 is used.

  In the present invention, C.I. I. Direct yellow 132 may be used alone as a colorant, or may be used as a mixture with other colorants.

  C. I. As dyes used in combination with Direct Yellow 132, water-soluble dyes represented by direct dyes, acid dyes, basic dyes, reactive dyes and the like are used, and in particular, sharpness, water solubility, stability, light resistance, etc. From the viewpoint of ink characteristics, for example, yellow dyes include C.I. I. Direct yellow 12, 24, 26, 44, 86, 98, 142; I. Acid Yellow 11, 17, 23, 25, 29, 42, 61, 71 and the like may be mentioned, and a plurality of these may be used in combination.

  Examples of dyes other than yellow include C.I. I. Direct black 17, 19, 32, 51, 71, 108, 146, 154, 168; I. Direct Blue 6, 22, 25, 71, 86, 90, 106, 199; C.I. I. Direct red 1, 4, 17, 28, 83, 227; I. Direct orange 34, 39, 44, 46, 60; I. Direct violet 47, 48; C.I. I. Direct Brown 109; C.I. I. Direct Green 59; C.I. I. Acid Black 2, 7, 24, 26, 31, 52, 63, 112, 118; I. Acid Blue 9, 22, 40, 59, 93, 102, 104, 113, 117, 120, 167, 229, 234; C.I. I. Acid Red 1, 6, 32, 37, 51, 52, 80, 85, 87, 92, 94, 115, 181, 256, 289, 315, 317; I. Acid Orange 7, 19; I. Acid Violet 49; C.I. I. B. Basic Black 2; I. Basic blue 1, 3, 5, 7, 9, 24, 25, 26, 28, 29; C.I. I. B. Basic Red 1, 2, 9, 12, 13, 14, 37; I. C. basic violet 7, 14, 27; I. Food black 1, 2 etc. are mentioned, These may mix and use multiple types.

  Regarding the dye content of the water-based ink for ink-jet recording of the present invention, C.I. I. The direct yellow 132 is 0.1 to 4% by weight based on the total amount of ink. In addition, C.I. I. The total amount of direct yellow 132 and other colorants is preferably 0.1 to 20% by weight based on the total amount of ink.

  The water-based ink for inkjet recording of the present invention contains water. As this water, it is preferable to use high-purity water such as ion-exchanged water or distilled water.

  The content of water in the ink is generally preferably 10 to 98% by weight, more preferably 30 to 97% by weight, and still more preferably 40 to 95% by weight with respect to the total amount of the ink.

  The water-based ink for ink-jet recording of the present invention includes, as an aqueous medium, in addition to water, a glycol ether having a melting point of −45 ° C. or lower (component (b)) and C.I. I. It contains a water-soluble organic solvent (component (c)) having a solubility of direct yellow 132 of 5% or more.

  Since the glycol ether having a melting point of −45 ° C. or less (component (b)) has a very low melting point of glycol ether alone of −45 ° C. or less, it is added to the ink to lower the melting point of the ink. Dye in ink C.I. I. There is an effect of preventing the low temperature precipitation of direct yellow 132.

  C.I. to glycol ether (component (b)) having a melting point of -45 ° C or lower. I. The solubility of direct yellow 132 is preferably higher.

  Examples of glycol ethers having a melting point of −45 ° C. or less (component (b)) include ethylene glycol methyl ether, diethylene glycol methyl ether, polyethylene glycol methyl ether, ethylene glycol isopropyl ether, ethylene glycol butyl ether, diethylene glycol butyl ether, and triethylene glycol butyl ether. , Ethylene glycol isobutyl ether, diethylene glycol isobutyl ether, ethylene glycol hexyl ether, ethylene glycol-2-ethylhexyl ether, diethylene glycol-2-ethylhexyl ether, ethylene glycol allyl ether, ethylene glycol benzyl ether, diethylene glycol benzyl ether, propylene glycol methyl Ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol propyl ether, dipropylene glycol propyl ether, propylene glycol butyl ether, dipropylene glycol butyl ether, tripropylene glycol butyl ether, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether , Diethylene glycol dibutyl ether, dipropylene glycol dimethyl ether and the like. These can be used individually or in mixture of multiple types. Among these, at least one selected from the group consisting of triethylene glycol butyl ether, dipropylene glycol propyl ether and diethylene glycol butyl ether can be preferably used.

  The content of glycol ether having a melting point of −45 ° C. or less (component (b)) is 0.5% by weight or more based on the total amount of the ink, and the following formula (I)

(In the formula, A represents the composition weight of the component (a) contained in the ink, and B represents the composition weight of the component (b).)
The amount that satisfies When the content of the glycol ether of component (b) is less than 0.5% by weight or [B / A] is less than 0.2, the melting point of the ink cannot be lowered sufficiently. I. Low temperature precipitation of direct yellow 132 cannot be sufficiently prevented. From the viewpoint of more surely lowering the melting point of the ink, [B / A] is preferably set to 0.3 or more. The upper limit of the content of the glycol ether of component (b) is preferably 10% by weight or less from the viewpoint of suppressing bleeding. Also, by setting [B / A] to 5 or less, bleeding between the ink of the present invention and the black ink can be suppressed.

  The water-soluble organic solvent of component (c) used in the present invention is C.I. I. Direct yellow 132 can be sufficiently dissolved at 20 ° C., specifically, C.I. I. It is a water-soluble organic solvent having a solubility of direct yellow 132 of 5% or more. Such water-soluble organic solvents include C.I. I. Since the solubility of direct yellow 132 is high, the C.I. I. This has the effect of preventing the precipitation of direct yellow 132.

  Examples of the water-soluble organic solvent of component (c) include those having a solubility of 5% or more even at -20 ° C. I. It is desirable from the viewpoint of preventing low temperature precipitation of direct yellow 132.

  C. at 20 ° C. I. Examples of the water-soluble organic solvent having a solubility of direct yellow 132 of 5% or more include 2-pyrrolidone, polyethylene glycol having a weight average molecular weight of 380 to 420, and the like. Furthermore, C.I. I. Examples of water-soluble organic solvents having a solubility of Direct Yellow 132 of 5% or more and a solubility of 5% or more even at −20 ° C. include diethylene glycol, triethylene glycol, polyethylene glycol having a weight average molecular weight of 190 to 210, and propylene glycol. , Dipropylene glycol, tripropylene glycol, 1,2,6-hexanetriol, N-methyl-2-pyrrolidone, triethanolamine and the like. These can be used individually or in mixture of multiple types. Among these, it is preferable to use at least one selected from the group consisting of diethylene glycol, triethylene glycol, polyethylene glycol having a weight average molecular weight of 190 to 210, and N-methyl-2-pyrrolidone.

  Note that C.I. I. The solubility of the component (c) of direct yellow 132 in water-soluble organic solvent is C.I. I. It can be determined by conducting a test to dissolve the direct yellow 132 by stirring or the like.

  C. of component (c) at 20 ° C. I. The content of the water-soluble organic solvent having a solubility of Direct Yellow 132 of 5% or more is represented by the following formula (II) with respect to the total amount of ink.

(In the formula, A represents the composition weight of the component (a) contained in the ink, and C represents the composition weight of the component (c).)
It is the amount that satisfies. When [C / A] is less than 3, C.A. I. There is a possibility that the direct yellow 132 may not be sufficiently dissolved and may be precipitated. C. I. [C / A] is preferably set to 4 or more from the viewpoint of surely suppressing the precipitation of direct yellow 132. The upper limit of the content of the water-soluble organic solvent of the component (c) in the ink is preferably 40% by weight or less from the viewpoint of suppressing bleeding. Further, by setting [C / A] to 60 or less, more preferably 55 or less, bleeding between the ink of the present invention and the black ink can be suppressed.

  The water-based ink for inkjet recording of the present invention includes glycol ether (component (b)) having a melting point of −45 ° C. or lower and C.I. I. In addition to the water-soluble organic solvent (component (c)) in which the solubility of direct yellow 132 is 5% or more, other aqueous solvents may be used as necessary.

  In addition, the water-based ink for inkjet recording of the present invention contains a surfactant so as to improve the initial ink introduction property, that is, so that the ink can be smoothly introduced into the narrow ink flow path inside the head of the inkjet printer. It is preferable to add.

As the surfactant, those used in conventional water-based inks for ink jet recording can be used. Preferable examples include alkyl ether sulfate ester salts. Among these, as a particularly preferred example, the following formula (1)

(In the formula (1), x is 12 or 13.)
The compound represented by these is mentioned. This compound of the formula (1) is commercially available, and is sold, for example, under the trade name Emar 20C from Kao Co., Ltd., under the trade name Sandet END from Sanyo Chemical Co., Ltd., and Sunnol DL 1430 from Lion Corporation.

  By adding the surfactant of formula (1), the wettability of the ink with respect to the head of the ink jet printer can be further improved. Therefore, even when foreign matter is mixed or generated when ink is introduced into the head of the ink jet printer, the foreign matter can be quickly removed from the head without staying in the head, eliminating the cause of clogging. It becomes easy.

  When the surfactant is blended in the water-based ink for ink jet recording of the present invention, the blending amount is preferably 0.01 to 5% by weight, and preferably 0.01 to 2% by weight with respect to the total amount of the ink. Is more preferable. If it is less than 0.01% by weight, the wettability of the ink with respect to the head of the ink jet printer cannot be sufficiently improved, and it is difficult to obtain the effect of improving the initial ink introduction property. On the other hand, if it exceeds 5% by weight, the ink wets around the nozzles of the head of the ink jet printer unevenly, making it difficult to stably discharge the ink.

  In addition, a viscosity modifier can be added to the water-based ink for inkjet recording of the present invention as necessary. As the viscosity modifier, glycerin or the like can be used. For example, in the case of glycerin, the content of the viscosity modifier is preferably 5 to 30% by weight with respect to the total weight of the ink. Thereby, according to the discharge mechanism of an inkjet printer, the viscosity of an ink can be easily adjusted to 2-5 mPa * s (20 degreeC). This viscosity is a value measured under the conditions of 20 ° C. and 60 rpm using a double cylindrical rotational viscometer.

  The water-based ink for inkjet recording of the present invention may further contain conventionally known additives such as various dispersing agents, surface tension adjusting agents, pH adjusting agents, antiseptic / antifungal agents and the like as necessary.

  Hereinafter, the present invention will be specifically described by way of examples.

Examples 1-9, Comparative Examples 1-7
Inks having the compositions shown in Tables 1 and 2 were prepared. In addition, the numerical value in a table | surface represents weight%. (B) is a glycol ether having a melting point of −45 ° C. or lower, and (c) is a C.I. I. This represents a water-soluble organic solvent having a solubility of Direct Yellow 132 of 5% or more. [B / A] is a composition weight (B) of a glycol ether having a melting point of −45 ° C. or less and C.I. I. The weight ratio of the direct yellow 132 to the composition weight (A), [C / A], is C.I. I. A composition weight (C) of a water-soluble organic solvent having a solubility of Direct Yellow 132 of 5% or more and C.I. I. The weight ratio with the composition weight (A) of direct yellow 132 is represented.

  As the surfactant, a mixture of a surfactant having x = 12 and a surfactant having x = 13 in the formula (1) was used.

  C. of component (a) with respect to water-soluble organic solvent of component (c) used in Examples and Comparative Examples. I. The solubility of direct yellow 132 is as follows. Diethylene glycol, 20% or more; Triethylene glycol, 5% or more; Polyethylene glycol # 200 (trade name (weight average molecular weight 190-210), Lion Corporation), 10% or more; N-methyl-2-pyrrolidone, 5% or more And glycerin, about 0.5%.

  In Comparative Example 5, the formula (2)

(In Formula (2), R is a C14-C15 alkyl group.)
Surfactants were used.

<Evaluation>
For the inks of the examples and comparative examples, (1) dye precipitation test after evaporation test, (2) dye precipitation test after low-temperature storage, (3) initial introduction test, and (4) bleeding evaluation were performed as follows. It was. These results are shown in Tables 1 and 2.

(1) Dye precipitation test after evaporation test Collect about 10 g of ink in a 24 mL glass container (standard bottle No. 2), leave the lid open, and leave it in an environment of temperature 60 ° C and humidity 40% for 3 days or more. After the water was evaporated almost completely (until there was no change in the weight of the ink), it was left at room temperature (about 20 ° C.) for 1 week or longer, and the state of the liquid after evaporation was observed and evaluated according to the following criteria.

Rank Evaluation Criteria ◎: When solid matter (dye) is not generated at all in the ink liquid after water evaporation ◯: When solid material (dye) is very little generated in the ink liquid after water evaporation △: After water evaporation When a small amount of solid matter (dye) precipitates in the ink liquid x: When a large amount of solid matter (dye) precipitates in the ink after evaporation of water

(2) Dye precipitation test after low-temperature storage About 100 g of ink was collected in a 170 mL glass container (standard bottle No. 12) and left in a -20 ° C. constant temperature bath with the lid on. One week later, the glass container was taken out from the thermostatic chamber at room temperature (about 20 ° C.), and the state in which the ink was dissolved was observed and evaluated according to the following criteria.

Rank Evaluation Criteria A: When solid matter (dye) is not generated at the bottom of the glass container immediately after ink dissolution O: When solid matter (dye) is slightly generated at the bottom of the glass container immediately after ink dissolution Δ: Ink When a small amount of solid matter (dye) is generated at the bottom of the glass container immediately after dissolution ×: When a large amount of solid matter (dye) is generated at the bottom of the glass container immediately after dissolution of the ink

(3) Initial introduction property test Place the ink in a pressure-resistant glass container, irradiate ultrasonic waves, use a vacuum pump to evacuate the ink container, degas the gas contained in the ink, and degas The initial introduction test was evaluated with a digital multifunction machine MFC3100C equipped with an inkjet printer manufactured by Brother Industries, Ltd. using the later ink. That is, immediately after the ink cartridge was replaced and purged (ink sucked by the pump of the printer main body) three times, a printing test was performed to determine the ratio of the ejection nozzles to the total number of nozzles, and the evaluation was performed according to the following criteria.

Rank Evaluation Criteria ◎: When the ratio of the discharge nozzle to the total number of nozzles is 100% ◯: When the ratio of the discharge nozzle to the total number of nozzles is 90% or more and less than 100% △: The discharge nozzle to the total number of nozzles When the ratio is 80% or more and less than 90% ×: When the ratio of the discharge nozzle to the total number of nozzles is less than 80%

(4) Bleeding evaluation Images in which the colors were combined so that black and yellow were the background colors were printed, and the blurring of the boundary surface where the colors were mixed and the discrimination of the characters were evaluated. The evaluation control was characters printed with no background for each ink. The characters were set to a font size of 11 points, and printed on recording paper (plain paper (Xerox 4200), Xelox) using a digital multifunction machine MFC3100C equipped with an inkjet printer manufactured by Brother Industries, Ltd. A black ink having the composition shown in Table 3 was used. Further, the evaluation was performed by visually observing how much the characters with the background are blurred compared with the characters without the background, and evaluated according to the following criteria.

Rank Evaluation Criteria 〇: Slight blurring occurs compared to characters without background, but characters are sufficiently distinguishable ×: Slight blurring occurs compared to characters without background, and character interpretation If it was difficult

  From the results of Tables 1 and 2, for the inks of Examples 1 to 9, (1) Dye precipitation test after evaporation test, (2) Dye precipitation test after low temperature storage, (3) Initial introduction test, (4) Bleeding evaluation In particular, when [B / A] is 0.3 or more, no solid matter is precipitated from the ink in the dye precipitation test after low-temperature storage, and [C / A] is 4 In the case of the above, no solid matter was precipitated from the ink in the dye precipitation test after the evaporation test, and good results were obtained. In the inks of Comparative Examples 1 to 5, [B / A] was 0.2. In Comparative Examples 1, 2, and 5 that are less than 3, the results of the dye precipitation test after low-temperature storage are inferior, and in Comparative Examples 1, 3, and 4 in which [C / A] is less than 3, the results of the dye precipitation test after the evaporation test are inferior. I understand that. Further, Comparative Example 6 in which the content of glycol ether (component (b)) in the ink exceeds 10% by weight and Comparison in which the content of the water-soluble organic solvent (component (c)) in the ink exceeds 40% by weight It can be seen that the ink obtained in Example 7 has a poor bleeding evaluation result. Therefore, according to the ink of the embodiment of the present invention, no foreign matter such as a dye is generated from the ink when the water content of the ink is evaporated or at a low temperature, and good long-term storage can be realized, and bleeding can be suppressed. You can see that

  Moreover, by comparing Examples 4 and 7 with other examples, it can be seen that the result of the initial introduction test can be improved by the addition of the surfactant of formula (1).

The water-based ink for ink-jet recording of the present invention includes C.I. I. It is useful as a water-based ink for inkjet recording, which contains direct yellow 132 and has excellent long-term storage stability. In particular, the water-based ink for ink-jet recording of the present invention is suitable for environmental changes such as high-temperature areas, dry areas, and cold areas, which are considered to be inferior use environments for ink-jet printers, and temperature changes during ink transportation and storage. Regardless, C.I. I. Stable use of ink containing direct yellow 132 can be realized.

Claims (10)

The following components (a) to (c):
(A) C.I. I. Direct Yellow 132 0.1 wt% to 4.0 wt%;
(B) a glycol ether having a melting point of −45 ° C. or lower, 0.5% by weight or more; and (c) C.I. I. A water-based ink for ink-jet recording containing a water-soluble organic solvent having a solubility of direct yellow 132 of 5% or more, wherein the following (I) and (II)

(In the formula, A represents the composition weight of the component (a) contained in the ink, B represents the composition weight of the component (b), and C represents the composition weight of the component (c).)
An aqueous ink for inkjet recording, characterized by satisfying   The content of the glycol ether of the component (b) is 10% by weight or less with respect to the total amount of the ink, and the content of the water-soluble organic solvent of the component (c) is 40% by weight or less with respect to the total amount of the ink. The water-based ink for inkjet recording as described.   C. of component (c) with respect to water-soluble organic solvent I. The water-based ink for inkjet recording according to claim 1 or 2, wherein the solubility of direct yellow 132 is 5% or more even at -20 ° C.   The water-based ink for inkjet recording according to any one of claims 1 to 3, having a viscosity of 2 to 5 mPa · s.   The aqueous ink for inkjet recording according to any one of claims 1 to 4, further comprising a surfactant in an amount of 0.01 to 5% by weight based on the total amount of the ink. The surfactant is represented by the formula (1)

(In the formula (1), x is 12 or 13.)
The water-based ink for ink-jet recording according to claim 5, comprising a surfactant.   The inkjet recording according to any one of claims 1 to 6, wherein the glycol ether of component (b) is at least one glycol ether selected from the group consisting of triethylene glycol butyl ether, dipropylene glycol propyl ether and diethylene glycol butyl ether. Water based ink.   The water-soluble organic solvent of component (c) is at least one water-soluble organic solvent selected from the group consisting of diethylene glycol, triethylene glycol, polyethylene glycol having a weight average molecular weight of 190 to 210, and N-methyl-2-pyrrolidone. The water-based ink for inkjet recording according to any one of claims 1 to 7.   Furthermore, C.I. I. The water-based ink for inkjet recording according to any one of claims 1 to 8, further comprising a dye other than direct yellow 132. Furthermore, water-based ink for inkjet recording in any one of Claims 1-9 containing water and glycerol.