Yellow recording liquid and producing method thereof and the use thereof
First Claim
1. A yellow recording liquid containing yellow pigment particles which are dispersed in a liquid, the yellow pigment particles being rendered hydrophilic at least on their surface, wherein the yellow pigment particles comprise at least two yellow pigment particles having substantially different particle sizes which different particle sizes are observable as two or more peaks.
1 Assignment
0 Petitions
Accused Products
Abstract
In order to provide an yellow recording liquid having superior spray stability, superior preservation stability, and superior water resistance of a recorded image, etc, yellow pigment particles which have been rendered hydrophilic (accepted a sulfonic acid group) at least on the surface (hydrophilic particles) are dispersed in a liquid. In the product yellow recording liquid, the hydrophilic particles are uniformly dispersed and the particles do not aggregate each other. Thus, the uniformly dispersed state of hydrophilic particles as a recording material can be maintained for a long period, thus realizing an yellow recording liquid having a superior spray stability and superior preservation stability. Further, the hydrophilic particles are also hydrophobic by the intrinsic property of the yellow pigment. Thus, the yellow recording liquid has desirable fixability with respect to a surface of a recording medium (recording surface), regardless of whether the recording surface is hydrophilic or hydrophobic.
14 Citations
26 Claims
- 1. A yellow recording liquid containing yellow pigment particles which are dispersed in a liquid, the yellow pigment particles being rendered hydrophilic at least on their surface, wherein the yellow pigment particles comprise at least two yellow pigment particles having substantially different particle sizes which different particle sizes are observable as two or more peaks.
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18. A method of using a yellow recording liquid which contains yellow pigment particles being dispersed in a liquid, the yellow pibment particles being rendered hydrophilic at least on their surface,
wherein the yellow recording liquid is used as a recording liquid of an ink jet recording device or a recording liquid of a writing tool, and wherein the yellow pigment particles comprise at least two yellow pigment particles having substantially different particle sizes which different particle sizes are observable as two or more peaks.
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19. A method for producing an yellow recording liquid, comprising the steps of:
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preparing a solution in which an yellow pigment is dissolved in an acidic liquid;
turning the solution into particles;
bringing the particles into contact with vapor containing water vapor and creating a supersaturated atmosphere of the vapor;
depositing yellow pigment particles which are rendered hydrophilic at least on their surface by allowing water to condense on the surface of the particles; and
dispersing the yellow pigment particles deposited in a liquid. - View Dependent Claims (20, 21)
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24. A yellow recording liquid containing yellow pigment particles which are dispersed in liquid, the yellow pigment particles being rendered hydrophilic at least on their surface, wherein the yellow pigment particles consist essentially of a mixture of hydrophobic particles having particle size “
- a” and
hydrophobic particles having particle size “
b”
, wherein the ratio of particle size “
a”
to particle size “
b”
is between about 1;
2 and about 1;
10.
- a” and
Specification