US6596065B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Black ink set and ink jet recording method using the same
Assignee: Seiko Epson Corp
•
Filing: 2001-07-27
•
Granted: 2003-07-22
•
Expires: 2021-07-27
Abstract
Abstract A black ink set is provided which, in a middle to high lightness region of images, can improve image quality, especially lightfastness and gradation, and can reduce graininess. The black ink set comprises at least a first black ink composition and a second black ink composition, wherein the first black ink composition has a lightness (L*) in the range of 1 to 30 as calculated from the spectral transmittance of a 1000-fold dilution of the first black ink composition and the second black ink composition has an L* value in the range of 35 to 80 as calculated from the spectral transmittance of a 1000-fold dilution of the second black ink composition and contains a compound represented by formula (I) as a colorant:wherein R represents a C1-6 alkyl group, a hydroxyl group, or a group -NR1R2 in which R1 and R2 each independently represent a hydrogen atom or a C1-6 alkyl group; and M represents an alkali metal or a group -NR1R2 in which R1 and R2 each independently represent a hydrogen atom or a C1-6 alkyl group.
Inventors
- 👤 Jun Ito
- 👤 Miharu Kanaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
161 words
An ink set comprising a first black ink composition and a second black ink composition, wherein said first black ink composition has a lightness (L*) in the range of 1 to 30 as calculated from the spectral transmittance of a 1000-fold dilution of said first black ink composition, and said second black ink composition has an L* value in the range of 35 to 80 as calculated from the spectral transmittance of a 1000-fold dilution of said second black ink composition and contains a compound represented by formula (I) as a colorant: wherein R represents a C 1-6 alkyl group, a hydroxyl group, or a group —NR 1 R 2 in which R 1 and R 2 each independently represent a hydrogen atom or a C 1-6 alkyl group; and M represents an alkali metal or a group —NR 1 R 2 in which R 1 and R 2 each independently represent a hydrogen atom or a C 1-6 alkyl group.
Claim 2
Dependent Claim
161 words
An ink set comprising a first black ink composition and a second black ink composition, wherein said first black ink composition has a lightness (L*) in the range of 1 to 30 as calculated from the spectral transmittance of a 1000-fold dilution of said first black ink composition, and said second black ink composition has an L* value in the range of 35 to 80 as calculated from the spectral transmittance of a 1000-fold dilution of said second black ink composition and contains a compound represented by formula (I) as a colorant: wherein R represents a C 1-6 alkyl group, a hydroxyl group, or a group —NR 1 R 2 in which R 1 and R 2 each independently represent a hydrogen atom or a C 1-6 alkyl group; and M represents an alkali metal or a group —NR 1 R 2 in which R 1 and R 2 each independently represent a hydrogen atom or a C 1-6 alkyl group.
Claim 3
Dependent Claim
41 words
The ink set according to claim 1 , wherein said second black ink composition has an L* value in the range of 45 to 65 as calculated from the spectral transmittance of a 1000-fold dilution of said second black ink composition.
Claim 4
Dependent Claim
21 words
The ink set according to claim 1 , wherein the colorant represented by formula (I) is C.I. Sulfur Black 1 .
Claim 5
Dependent Claim
17 words
The ink set according to claim 3 , wherein C.I. Sulfur Black 1 is soluble in water.
Claim 6
Dependent Claim
27 words
The ink set according to claim 3 , wherein the content of said C.I. Sulfur Black 1 is 1to 5% by weight based on the ink composition.
Claim 7
Dependent Claim
24 words
The ink set according to claim 1 , wherein the first and/or second ink composition contains a lower alkyl ether of a glycol compound.
Claim 8
Dependent Claim
45 words
The ink set according to claim 6 , wherein the lower alkyl ether of the glycol compound is at least one member selected from the group consisting of diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, propylene glycol monobutyl ether, and dipropylene glycol monobutyl ether.
Claim 9
Dependent Claim
30 words
The ink set according to claim 6 , wherein the content of the lower alkyl ether of the glycol compound is 3to 30% by weight based on the ink composition.
Claim 10
Dependent Claim
21 words
The ink set according to claim 1 , wherein the first and/or second ink composition contains an acetylene glycol nonionic surfactant.
Claim 11
Dependent Claim
28 words
The ink set according to claim 9 , wherein the content of the acetylene glycol nonionic surfactant is 0.01 to 3% by weight based on the ink composition.
Claim 12
Dependent Claim
15 words
The ink set according to claim 1 , which is used in ink jet recording.
Claim 13
Dependent Claim
34 words
A recording method comprising the step of depositing an ink composition onto a recording medium to perform printing, the ink composition being an ink composition in the ink set according to claim 1 .
Claim 14
Dependent Claim
42 words
An ink jet recording method comprising the steps of: ejecting droplets of an ink composition; and depositing the droplets onto a recording medium to perform printing, the ink composition being an ink composition in the ink set according to claim 1 .
Claim 15
Dependent Claim
12 words
A record produced by the recording method according to claim 12 .
References Cited (Backward Citations)
US5368637A
Cited
US5888284A
Cited
US5725641A
Cited
JPH10130557A
Cited
US6234601B1
Cited
JP2000044851A
Cited
US6481841B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-07-21 | 2007-01-20 | 2007-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-07-21 | 2011-01-20 | 2011-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-07-21 | 2015-01-20 | 2015-07-22 | $7700.00 | Window Closed / Lapsed |