JPS5880366A - Water-base ink composition - Google Patents

Abstract

PURPOSE:To provide the titled compsn. which does not cause clogging of nozzles, gives clear print which is not blurred, and is suitable for use in stamps for printing, writing utensils and recording, containing a water-soluble dye, a compd. having a specified structure and water. CONSTITUTION:A water-soluble dye, a compd. of formulaI(wherein Z1 is a five a six-membered ring-forming atomic group; R1 is H, alkyl, substd. alkyl, phenyl, substd. phenyl) and water are blended together to obtain the titled compsn. The amount of the compd. of formulaI varies depending on the water- soluble dye to be used, and is generally 0.2-60pts.wt. based on the amount of the ink compsn. Pref. expamples of the compd. are those of formula II wherein R2 is H, methyl, ethyl, a 2-6C hydroxyalkyl, -X1-O-(CH2CH2O)n-H group (wherein X1 is a 1-6C alkylene), n is 1-10; R3-6 are each H, methyl, ethyl. An example thereof is a compd. of formula III.

Description

Detailed description of the invention *FXmiui from the present invention, line f%114. f, m total M, X
Water-based ink footwear suitable for p7 printing, more details JII
In order to avoid clogging of the nozzle AIII and provide a clear and non-smearing ink composition, the following is an ink for interjet printing. The present invention will be explained in detail by taking the following as an example.

In the inkjet printing method, ink is ejected as ink droplets from a fine nozzle (normal number of electrons or hundreds of electrons), and each ink droplet is given static electricity of a constant Wr by an electric signal, and is subjected to high-pressure deflection. A method in which characters such as a letter cross are formed on the surface of the printing medium according to a predetermined dot matrix according to a predetermined dot matrix due to the electrostatic unevenness of the electrodes.
A method in which ink droplets are electrostatically drawn out from a high-voltage electrode from a nozzle, accelerated, and electrostatically deflected by a deflection electrode to form a shadow of the figure in the text on the surface of the printed body in accordance with a predetermined drag matrix. A typical method is known in which ink droplets are ejected in response to electrical signals to form characters, figures, and soft characters on the surface of a printing medium according to a predetermined dot matrix.

That is, in Fujiera F mark 11tj, basically, the ink is ejected from the moldy nozzle as an inner part, and the charged ink ili is controlled electrostatically, or
The idea is that ink droplets are ejected from the nozzle of the mold J1i1 in response to an electrical signal, forming the letter G on the surface of the printing medium.

The water-based ink for Infusiera F stamps is made up of nine compositions, including a water base, a hydrophilic organic solvent, a coloring dye, and various other additives as necessary. Metal, paper, cloth, etc.! ! i
It is conveniently used to mark letters, figures, and spears on surfaces.

By the way, the water-based ink vCσ, which is used as an inkjet printing ink, is required to have the following properties.

(1) Necessary e41L for Jb7tJ6, which is ejected from a fine nozzle to obtain uniform ink droplets. (a) The viscosity of the ink is /-10c, p, (at Jo@c).

(b) This happens when the surface tension of the ink is more than 0dyn@/CH1.

(c) The ink is homogeneous and there are no irregular particles.

(21 wrinkle printed font f! Characteristics that are required on the surface.

(a) The ink has good permeability to the printed material, and the drying properties of the ink are good, so that the ink permeates or dries quickly after inkjet printing, and characters, figures, and spears do not collapse.

#P) The ink must be water resistant to the extent that it will not run off even if water adheres to the letters, figures, and - printed on the inkjet print.

(c) Good adhesion to the stamped sttm in the in-in when printing Infusiera F.

(3) Characteristics in the ink necessary to obtain colored gIIt on the surface of the printing medium.

The dye contained in the dye must be at least the color required for the final coloring.

(b) The dyes contained in the ink have LA9 yellow, magenta and cyan spectral properties acceptable for subtractive color methods, absorb in the desired spectral range, and! There should be no side absorption.

(c) The coloring obtained by inkjet printing is sufficiently clear and does not bleed.

(b) The dye σ contained in the ink exhibits high chroma and darkness on the surface of the printing medium, and the hue changes even when it is stored as an ink and after being printed and attached to the surface of the printing medium. It should have no change, high light resistance, and no color fading.

((e) The dye contained in the ink must have a high solubility in water to form an ink with high color saturation; (f) The dye contained in the ink must have a Do not increase the viscosity during 1111K-in.

(g) The dye contained in the ink must have low crystallinity so that it will not crystallize or solidify during preservation or storage as an ink, causing nozzle clogging.

In order to meet these O**at requirements, in order to prevent the IIK inkjet printing price equipment nozzle part 01 from falling, and to prevent the dye from clumping and sedimentation due to the aging of the ink, more than conventional methods are used. Hydrophilic organic solvents are well known.

Alkylene/glycol solvents, which became known during this period, generally have a high viscosity and low vapor pressure. Therefore, water-based ink for inksheet printing blocks containing alkylene glycol solvents is dried and assimilated in the nozzle when jetting is interrupted. However, under severe usage conditions such as jetting for a long time, stopping jetting for about a week or so, and then re-spraying, dyes or dyes may be present in the nozzle. Solid matter precipitates in the ink and ink additives, clogging the nozzle, causing BT, and inhibiting smooth ink jetting. In this case, if the content of the alkylene glycol solvent is increased, the drying assimilation of the ink remaining near the nozzle will be improved to some extent, but it will not be a substantial improvement, and on the other hand, the viscosity of the ink will increase. Therefore, the ink cannot flow through the nozzle at a sufficient speed, and as a result, print irregularities are likely to occur.

In addition, since alkylene glycol alkyl ether solvents generally have low 11-plane tension,
Unlike the adhered ink droplets, on printing materials such as paper and cloth, the ink droplets penetrate from the back at from the insertion. The highest #0 so obtained by doshin on the 11th side is unseen-rc. In addition, because it is a water-soluble dye, its dissolving power is low and sufficient color development cannot be obtained.
Oh, the drawback is that it increases the viscosity of the ink.

Other known hydrophilic organic solvents did not necessarily satisfy the IIII characteristics required for the above-mentioned water-based ink for inkjet printing. .

The first purpose of this product is for printing, marking tools, recording needles,
By providing water-based ink for printing.

A second purpose of overlapping is to provide an improved water-based color ink that does not cause nozzle blockage.

A third object of the present invention is to provide a water-based ink that exhibits excellent stability over time without causing agglomeration or sedimentation of the 4111 material as the ink ages.

A fourth object of the present invention is to provide a water-based ink that has excellent ink permeability into a printing medium, has excellent drying properties, and provides writing performance without bleeding.

The fifth object of the present invention is to have yellow, i-ink, cyan, and other inks that have saturation and color density at the same level on the printing medium, and that do not change in saturation or color density even after being left for a long time. An object of the present invention is to provide a black water-based color ink for inkjet printing.

These objects of the present invention are based on water-soluble dyes of the following general formula (I
) and water-based ink containing water.

General formula (I) 1 1 Medium length, zl is! or represents a 4-membered *S atom, R1 represents a hydrogen atom, an alkyl group, a substituted alkyl group, a phenyl group or a substituted phenyl group, where Z is represented by the general formula (I),
Formed by J:1! Or specific examples of one-membered succinimide, maleic acid indo, daltaric acid imide, 7
Taric acid imide, diglycolic acid imide, hydantoin,
Barbylic acid, uracil, etc., and among these, succinimide, indomaleate, glutarimide, and hydantoin are preferred.

The number of carbon atoms in the alkyl moiety in the substituted alkyl group represented by R1 ranges from 1 to 3. Particularly preferred are methyl group and ethyl group. Examples of the substituents of the substituted alkyl group include hydroxy group, carboxy group, sulfo group, alkoxy group, substituted alkoxy group (substituents include hydroxy group, etc.), cyano group, anno group, acylamino group, carbamoyl group, etc. Among these, a droxy group, a carboxyne group, and a sulfo group are preferred.

Substituents for the substituted phenyl group include carboxy groups, sulfo groups, hydroquine groups, alkyl groups, alkyl moieties, halogen atoms (chlorine atoms, ^ atoms, etc.), and among these, carboxy groups and sulfo groups are preferred. It's so clean.

Compounds used in the present invention v4 that are preferred for IP# are represented by the 6th general formula (I[).

General formula (I[) In formula 8. is a hydrogen atom, a methyl group, an ethyl group, a hydroxyalkyl group (carbon number -~4), or -xl-o→CH2
CH, 0-)TH group (where Xl is an alkylene group (preferably carbon number/%4), El is 7 or more (preferably/
, 10) represents the integer - ",) represents 1, R8, R4
, R5 and R6 may be the same or different and each represents a hydrogen atom, a methyl group or an ethyl group.

Next, specific examples of the compound represented by the general formula (I) used in the present invention will be shown. However, the present invention Kl! The compound represented by the general formula (I), which is limited to only the compound FXt and Rena, is a known compound and is a compound that can be easily synthesized or obtained.
Compound of O
rganic Ch@m1stryJP //JJ
(/919), American Al Patent No. J, Jf., I. It can be easily synthesized.

The compound of general formula (I) is a compound that can be mixed with water in any proportion. ＠The dye used for brightness has a remarkable effect on water saturation and color depth by increasing its ambiguous properties on the printing medium, and has a good moisturizing effect, which significantly prevents the ink from drying out at the nozzle. I understand.

The compound represented by the general formula (1) in the present invention can be mixed with water in any proportion, but since the amount added in IIK of the present invention is for one use, irregularities may occur depending on the type of water-soluble dye. The amount is from 0.2 to 40 parts by weight, preferably from 1 to 10 parts by weight, and more preferably from 1 to 11 parts by weight, based on the weight of gold.
Parts by weight.

The compound represented by the general formula CI) in Book-11 has a low viscosity and a small change in surface tension, so even if the amount added as a heat insulating agent and sS forming agent is changed, the viscosity 1 required for an inkjet ink is maintained. /~tc, p, (koo”
It is a meeting to be held at C>, Sara K u Odyne/
A surface tension of ls or more can be maintained. Therefore, it is a liquid organic solvent suitable for forming ink droplets with a fine particle size at high speed.

In the present invention, the compound represented by the general formula (1) shows remarkable effects as a humectant and a solubilizing agent, but alkylene glycols, alkyl ethers of alkylene glycol, 1. ! -Dialkyl-J-2da silidinones, carmen forged amide derivatives, lactones, dioxyethylene sulfur compounds, alcohol compounds, N-formylcutam derivatives, Corbyloli, tones, sulfolane, -Kasha is dihydric alcohol Even when used in combination with other drugs, these effects do not decrease.

In the present invention, in order to enable continuous and stable jetting for a long period of time, in other words, to prevent JI from drying out due to dyes and other compounds, which is one of the causes of nozzle condensation, a general formula is used as a heat insulating agent. The compound represented by (1) - is added, but another cause of nozzle clogging is thought to be the formation of agglomerates due to a+ and K, and 4 m of a fungicide is added. Mold or bacteria live in all parts of inkjet printing equipment, such as the ink flow path, storage tank, and nozzle, and if nine conditions suitable for growth such as Sakae II source, temperature, and am are met, mold can be eliminated. Bacteria multiply rapidly, forming colonies and forming aggregates that absorb the dye and other compositions, causing clogging.

Cabinet Sufumezuma B on the conventional model.

Dioxine (2, Coke Methyl-6-Arder I) disclosed in US Li Patent No. J7T)
IPV-dioxin-/, J), JP-A @10-de! #0
No. 1 discloses indium omazi/(co/lysine thiol-7-oxide sodium salt), 'I#R
r-quinolitoul citrate as shown in rl19J-Iizyoy No. KNJ, Japanese Patent Publication No. 74<-142413 and 11f1JJ4t-/42 Yumegin 45VC, sodium dehydroacetate and l as disclosed.

It is known to use copenzisothiazoline-3-oneine salt, co(thiazolyl)-benzimidazole, and the like.

In this case, it was due to bacteria! I
If it is necessary to prevent this, the above-mentioned known compound WSt can be added. The amount added to the ink can be within the range that maintains the anti-mildew effect and does not cause problems with inkjet treatment.

Suitable water-soluble dyes used in the present invention include direct dyes, basic dyes, reactive dyes, and acid dyes. Strong color shading of the image [K! will be determined.

The color intensity of Ken is determined by the interaction between the ink and the printing medium, and the amount of these dyes added to the ink is determined in relation to the printing medium.
Mainta, Cyanshi Yohi Platter Ink Style'll1K is 0-color ink, respectively, and III Danku is water-soluble dye of 0.1~/j weight of the total ink composition weight.
The amount is preferably 0.1 to 7 parts by weight for livestock.

Examples of direct dyes, basic dyes, reactive dyes and acid dyes that can be used in this li- include, for example, JP-A-Sho #f-1
fJJ41L, Oka jJ-94101, 12-18
No. 6107, Oka 18-19111, 1l-jJjf
I, Oka 11-#1/JJ, special public Shoj-J/741
It is a good idea to mention dyes from manure in the dyes disclosed in the issue.

CI) Direct I! Brass C, I, Direct Yel Crow OW J
F(C,X,11910)C,1,Dir@ct Y
yellow Kot (C, 1, /9111) C, I, Di
rect YI mouth OW 77 (C01, KotOJe)
C, I, Direct Yellow ItC, 1, D
lrect Yel Demonow ItC,I,D
i rect Yel 10W #4C,I,Dir
@ct Yell breath owia.

C, r, Dl rec t Red 41
ψ φ 77 (C, 1, kojJ
IO) ψ * 79 (C
, I, Koji041)◆ ψ ψ II
(C, 1, jj7rO)su ψ
ψ IJ ((, ', I, koFJko!) ψ
ψ ψ 9tψ
ψ ψ here Oψ ＃
Kokoda ψ ψ ◆ #7 (C, 1, Jt
plo) ψ ψ ψ Reference 1 (C,
1.J? /Jj)ψφsu z
t (e, 1.ko7de.ri ψ ψ
vinegar ? O small φ ψ F−
” ” Blue / (C
,1,Jl4110)◆ ◆ ψ
to 9 φ 7/ (C,
LJ reference dream 0) 4p ψ ψ 74
(e, 1.1411//) ψ
ψ yz (c, r, i'u＊oo)
ψ ◆ t.

Nasu ψ
14 (C,I,7#/II)C,1,D
lrectBlue90 ψ ψ ψ 1114 (C, 1
,j/JOO)e * * /I
II (C0I, j/JJ.) Pregnancy 4p
ψ /JJ (C, 1, J470j) ψ
◆ φ /47 (C, 1, Jsj
6el) 4p ψ *
/41e * Black /f
(C0I, J7Jjj) e e *
1F (C, I, JlJJj),
, -7/ (C, I, J#oIl□)*
* * 7# (C, X, I
II/10) ◆ Conflict ◆ 71
(C, 1, JjF76) ψ #
＃／／J dispute ◆ ◆
l/γ(It) acidic dye C, 1, Acjd Yel ow /7
(C, I, /rf4j)φ # ψ
/? ψ ψ p Jj
(C01,/1111)su φ φ
CoF (C0Ln19110) * e
e Jr (C, I, Jj/7
7) Conflict ψ ψ #tC,I
, Ac1d Yellow jFψ #
ψ 41su ψ
ψ 7 C, I, Ac1d Red
/ (C01,/1010)su φ
Su reference (C, 1, / reference 710) ψ
φ φ r (C, I, / Yume de 00)
ψ ψ JJ (C01, /4
/10)ψsu * JJ (C
,I,/70! j) ψ ◆ Su J San (C, I, /7 (+JQ) Su Su Su
Jl (C01,11061) ψ ψ
Dako (C, 1, /7070)ψ
ψ ψ IJ (C01, #
1100) Su ψ
! 7s * e 12
(C, I, 41201) 4p ψ
//74p ψ ψ
/J/su ψ ψ /JJ (C
01, /7991) ψ ψ φ /II
(C, I, /I/JO) ψ
/16 (C, 1, /It10)ψ ψ
# Jj de (CA, /Ill da) C, 1, Ac
1d Red J7##
◆ ko4j (C,I,/lJ#)C,1,
Ac1d Violet y (C, 1, /
1011) $ * Jar //
(C01,/1040) Su Su a
jJ (C01, /f#7j) ψ ψ
ψ J reference (C01,41710I4ito
o) ψ ψ ψ 7IC
,1,Ac1d Blue Jji (C
, I, ko□114o) ψ ψ ψ
/J441 ψ −J /7/
◆ ψ ψ /71#
S ψ /IJC,1,Ac
1d Black / (C, 1, J (7
$70) ψ ψ J thing (C, I
, ko4J70) # ψ
J4 (C, 1, core 0'IO) ψ ψ φ
Reference 1 (C, 1, 4j#6j) 41#
Conflict jJ (C01, /17//)
ψ ψ ＃jtψ
ψ 4#C, 1, Ac
1d Black 107 Small
ψ 109s φ
Su //Psu ψ
/J／ψsu φ
1n(III) reactive dye C,1,i act+ve Blue
7ψ ◆
l dream ψ fight ψ l! ψ
ψ ψ /lψ
ψ a J/φ
◆ Ko! #
Less l◆
ψ Kona
a ψ Jψ 4p
Su jJ Su
◆ Reference ψ
I! ◆
# 17C11, Rea
ctiv*Red JC,I, Reac Hve Rad 6
ψ dispute //41
Su ψ koJψ 4
p64 Red Reactive6 Viol@t 2su
I'll visit you.
ψ r−su ＃
9 [■] Basic dye C,1,Ba5ic Yeow //ψ
Su ノ＃、−◆ψ
ko ＃ ψ ＃ ３ ◆
Red / ψ dispute ψ ψ tψ
φ ψ lKona φ ψ
/J* Baalc Vi
olet J#4#φ
7C, I, Bas+c Violet
/$C,I,Ba5ic Blue
J The water-based ink used in the method of the present invention contains oxygen a.
Abrasions can also be added. Tokukai Sho is the best oxygen absorber! Cor 7 Tadasan No. 4, same! ! -4/4I/Jll) Sulfites such as sodium sulfite and sodium hydrogen sulfite, the same! D-glubosu, L-ascorbic acid, etc. described in 4-Kotei Santsu No. 2 can be used.

Furthermore, as surface tension adjusting agents, cationic surfactants (e.g. alkylpyridium sulfates), anionic surfactants (e.g. sodium alkyl sulfates), and nonionic surfactants (e.g. diethylene alkyl ether in polio, etc.) Alternatively, amphoteric surfactants can be used.

There is no limit to the percentage of inkjet printers that can use the ink of the present invention, and U.S. Patent No. J,-91
．． Charge control method as described in OJO issue,
It is also possible to use a pressure canolus method as described in U.S. Pat. No. 1,7, No. 7, 120.

In addition, the printing materials used for inkjet printing using the ink of the present invention include paper, cloth, and fill paper, but there is no limit to the H% of paper, and in general, inkjet printing is possible. Any paper that is commonly used can be used, but it is preferable to use %
This is so-called coated paper, which is made by applying a tm cloth such as a clay layer on top of the paper. When it comes to coated paper, Confucianism is the way to go! j-／＃＃
You can refer to the descriptions in the /7 issue and the Okazz-tubtr issue.

Book II with examples of Kll theory below! Shizuku t more @-.

In the examples, "parts" and "h" indicate weight st.

Example L (yellow ink of the present invention-1) C0! ,
Mucid Yel Seal ow/7
, Ko1, Jl-1i (lrio Flavine
JG/r011CIBA-GIIGYII) Compound-(1) JG, 0 parts water
77. Contain more than J parts! After stirring for 1 hour while heating 08CK, it was subjected to pressure-filtering (JKp/cxa2) using a microfilter FM type (manufactured by Fuji Photo Film ■) with an average pore diameter of o, rμ, and a diameter of -7. I got some ink.

In the same manner, the ink of the present invention and the comparative ink tlI were prepared using the following formulations.

Example ! (Yellow inky coco of the present invention) C, I,
Ac1d Ye eyesow 4jl 3.0 parts (Ka
yanol Yel low NFG manufactured by Nippon Kayaku ■) Compound (2) 10.0 volumes Triethanol - 0 parts Water
7! , 0 copy Example L (Magenta key of the present invention/) C, 1, Ac
1d red 11 J, 47 parts (8 parts minor Lava order ng Br1ll 1mn1R
ad 8JB Sumitomo Chemical @) Compound (3) 10.0 parts diethylene glycol ethythyl ether /, 0 @ triethanolamine 1.1 parts water
Part 7, Part 3 Examples (Magenta ink key of the present invention-1) C, I, Ac1d
red 12 2.0 parts (Diacld A
xarlne RubinolFJQ JOO44 Mitsubishi Kasei 111@l1l) Compound (4)
J 4.0 parts diethylene glycol monoethyl ether k O, 1 part triethanolamine J, 0 parts water
6t, 1 part example &(
Cyan ink of the present invention-7) C, 1, Dlract
Blue 14 J, Division (Llonol
Blue G8 Toyo Ink Manufacturing ■) Compound (1) Jo, 0 parts thiodiglycol! , 0@triethanolamine 1.1 parts water
if, 7@Example &(
Black ink of the present invention - I) C, 1, Dlrect
Black/de J, 0 parts (Kaymrus
Black Q conc Nippon Kayaku ■) Compound a field /! , 0 parts J-
Methyl sulfolane 10.0 parts Diethylene glycol monoethyl ether Co, jIl Triethanolaone J, 0 @ water
6! , 1 part comparative example L(
Comparative ink-1) C, I, Ac1d Yal-ow/7 Co, j part N, N-di [β-hydroxyethyl)-formamide 20.0 parts (in Japanese Patent Application Laid-open No. Shosan F-974-0 Disclosed Compound) Water
77, j part Hijun I'm
l Comparative amount inkyco) CJ, INrect Black /f
J, 0 parts N-hydroxyethyl-copyrrolidone 4.0@(41
1 Kaishoj/-jt/27-oddly disclosed compound-) diethyle/
Glycol monoether ether 2.3 parts Triethanolamine 7.0156 Water
6j, 1 part ratio w example &
(Innoky J for comparison) C, I, Direct Blue r & Thiodiglycol Ethylene Oxai V adduct Jn, o @ (Compound shown in 411 Kaisho J/-J Ha No. 1 Kll) Triethanolamine 1.1 parts Water
Viscosity change and surface tension tm constant of the obtained ink - results shown in 1st IE were obtained. Furthermore, average hole @o, r voice m1 voice value 1 immediately after reference 2 black filter F
'M type pressure filtration (711/ffi'')
l Ink tone development Naoki and ink in the refrigerator (Da@C) yc
/ After preserving Yuzuki, I paid tribute and checked whether I could make P-yu without adding I.

In addition, in order to check the drying condition at the tip of the nozzle of an inkjet printer, we applied each ink to the inkjet printer "Jet Point" (Sharp ■K), left it at room temperature for 10 days, and then operated the printer to confirm that the nozzle was clogged. I checked whether it was or not. The obtained results were summarized in the first @K.

Furthermore, the characteristics of recording paper 1jilK, which was produced by inkjet printing of recording paper-I & rP-TiK made with the following formulation using the ink of the present invention and the comparative ink, were investigated. The results obtained are summarized in Table 1.

Creation of recording paper-■ LBKP (broad-leaved exposed kraft pulp) 10omt
Beat the water to RP water level and add 1 part of Merck, 1 part of saponified rosin, and sulfuric acid band Jllt to make the basis weight 10.
The base paper of 077/wag was made into second paper using a Fourdrinier paper machine. During paper making, J j /
ml I! I cloth 7t.

Synthetic A 2nd Ito 70 @, 5 parts of synthetic alkaline silicate, 5 parts of JO, 0 parts of sodium hequinametaphosphate. J Iku, Kaiinno0@s
70 parts of sticine-zotadiene copolymer latex, Tara 2 It/II and polyethylene glycol part
ll I mwi minutes J0 regretful armor *tgi housing.

The above-mentioned base paper was coated with a Takumi air knife coater so that the coated amount was 10 px1 on one side, dried, and then coated with 1 currenmeter of soot to prepare a recording paper.

Creation of Record - Paper - ■ A piece of base paper with a basis weight of 001/2 and a cob size of Jul/3 (wK basic polymer (dicyandiamide condensate C Sanyo Chemical @ Nanfitasu 70)) t! Weight %, gelatin weight type and synthetic aluminum silicate! Water that has a weight sound **t* dry lll1i 1 minute, 19/vm
As is clear from Table 1, the ink of the present invention does not clog immediately after preparation and after storage in the refrigerator. This shows that there is no change in the ink over time, and it was possible to draw without clogging sound even after leaving it for JO days with a medium weight inkjet printer.

Furthermore, as is clear from Table 1, the inks of the present invention h, **
High speed and no smearing at the end of the paper,
I gave a clear record-ii*.

Patent Applicant Fuji Photo Film Co., Ltd. Procedural Amendments Showa HW Togetsu 7++ Commissioner of the Patent Office Shima 1) Haruki Tono 1, Indication of Case Showa J. R. Special) (1 No. 17)
7 DetBn□ 2. Invention) Name Water-based ink composition 3. Relationship with the case of the person making the amendment Patent applicant Address 210-4 Nakanuma, Minamiashigara City, Kanagawa Prefecture Subject of amendment "Detailed description of the invention" in the specification Column 5, Statement of Contents of Amendment The amendments will be made as follows.

IJ/Page 4, φth line, ``Small'' is fixed as ``Small''.

2) /r negative/Correct to "addition amount Jt-r addition amount" on the 7th line.

3) "C, I, Acid Yel" on the tjjtth line
low4'JFJ t rC,I, Ac1d Ye eyesow Hiro9'' is corrected.

4) Correct "maze ink" in line l# of page R to "maze/tink". ◎ 5) Correct Jt member to "on which Jtr record on brass paper" in line.

Claims (1)

[Scope of Claims] A water-based ink composition containing a water-soluble dye, a compound represented by the following general formula (I), and water. General formula (1) In the formula, z represents an I or Fs 4-membered concentrated atomic group, and 8□ represents a water bulk atom 1 alkyl #! ! -Substituted alkyl group, phenyl group Xflt substituted phenyl at.