JP2007246889A5

JP2007246889A5 -

Info

Publication number: JP2007246889A5
Application number: JP2007034015A
Authority: JP
Filing date: 2007-02-14
Publication date: 2010-03-25
Anticipated expiration: 2027-02-14

Description

前記の目的は、下記の本発明によって達成される。すなわち、本発明のインクは、熱エネルギーの作用により記録ヘッドからインクを吐出するインクジェット記録方法に用いる、顔料、樹脂、及び水溶性有機溶剤を含有してなる水性インクであって、前記顔料は、親水性度δｍが、２１．５以上２３．５以下の範囲にある、Ｃ．Ｉ．ピグメントバイオレット２３であり、かつ、前記水溶性有機溶剤のインク中における含有量が、インク全質量を基準として、５．０質量％以上１７．５質量％以下であることを特徴とする。 The above object is achieved by the present invention described below. That is, the ink of the present invention is a water-based ink containing a pigment, a resin, and a water-soluble organic solvent, which is used in an inkjet recording method in which ink is ejected from a recording head by the action of thermal energy . hydrophilicity δm is, area by near 21.5 or 23.5 or less, C. I. Pigment Violet 23 der is, and the amount contained in the ink of the water-soluble organic solvent, based on the total mass of the ink, and equal to or less than 17.5 mass% 5.0 mass% or more.

Claims

A water-based ink containing a pigment, a resin, and a water-soluble organic solvent used in an ink jet recording method for discharging ink from a recording head by the action of thermal energy,
The pigment, hydrophilicity δm is, area by near 21.5 or 23.5 or less, C. I. Pigment Violet 23 der is,
The water-based ink is characterized in that the content of the water-soluble organic solvent in the ink is 5.0% by mass or more and 17.5% by mass or less based on the total mass of the ink.

The water-based ink according to claim 1, wherein the resin has a weight average molecular weight of 2,000 or more and 5,000 or less.

The water-based ink according to claim 1, wherein the water-soluble organic solvent contains polyethylene glycol having a weight average molecular weight of 1,000 or more.

A water-based ink containing a pigment, a resin, and a water-soluble organic solvent used in an ink jet recording method for discharging ink from a recording head by the action of thermal energy,
The pigment is C.I. I. Pigment violet 23,
The water-based ink is characterized in that the content of the water-soluble organic solvent in the ink is 5.0% by mass or more and 17.5% by mass or less based on the total mass of the ink.

A water-based ink containing a pigment and a resin used in an ink jet recording method for discharging ink from a recording head by the action of thermal energy,
The pigment is C.I. I. Pigment violet 23,
In addition, the light absorption characteristics of the ink each have a maximum absorption wavelength in a wavelength range of 530 nm to 540 nm and a wavelength range of 550 nm to 570 nm.
The relationship between the absorbance (A) at the maximum absorption wavelength in the range of 530 nm to 540 nm and the absorbance (B) at the maximum absorption wavelength in the range of 550 nm to 570 nm is the condition of the following formula (1): An aqueous ink characterized by satisfying the requirements.

The light absorption characteristics of the ink further have a maximum absorption wavelength in a wavelength range of 530 nm to 540 nm and a wavelength range of 620 nm to 630 nm,
The relationship between the absorbance (A) at the maximum absorption wavelength in the range of 530 nm to 540 nm and the absorbance (C) at the maximum absorption wavelength in the range of 620 nm to 630 nm satisfies the condition of the following formula (2). The aqueous ink according to claim 5, which is filled.

C. above. I. The water-based ink according to claim 5 or 6 , wherein the pigment violet 23 has a hydrophilicity δm in the range of 21.5 to 23.5.

The water-based ink according to any one of claims 5 to 7 , wherein the resin has a weight average molecular weight of 2,000 or more and 5,000 or less.

Furthermore it contains a water-soluble organic solvent, the water-soluble content in the ink of the organic solvent, based on the total mass of the ink, according to claim 5 or 8 or less 17.5 wt% 5.0 wt% or more The water-based ink according to any one of the above.

The water-based ink according to any one of claims 5 to 9 , wherein the water-soluble organic solvent contains polyethylene glycol having a weight average molecular weight of 1,000 or more.

In the ink jet recording method for recording on a recording medium by ejecting ink by action of thermal energy, the ink-jet recording in which the ink is characterized in that it is a water-based ink according to any one of claims 1 to 1 0 Method.

In the ink cartridge including an ink storage portion for storing ink, an ink cartridge in which the ink is characterized in that it is a water-based ink according to any one of claims 1 to 1 0.

An ink storage portion for storing ink, a recording unit and a recording head for ejecting the ink by action of thermal energy, the ink is the aqueous ink according to any one of claims 1 to 1 0 Recording unit characterized by being.

In the ink jet recording apparatus comprising an ink storage portion for storing ink and a recording head for ejecting the ink by action of thermal energy, the ink is aqueous according to any one of claims 1 to 1 0 An ink jet recording apparatus comprising ink.