Ink set, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus and aqueous ink
An inkjet recording method and water-based ink technology, which are applied in the field of complete ink sets, inkjet recording, ink cartridges, recording units, inkjet recording equipment and water-based ink, and can solve the problems of ink bleeding and inability to accurately control ink coating Problems such as the surface area of the recording medium, to achieve the effect of improving shades and maintaining color uniformity
Inactive Publication Date: 2008-11-12
CANON KK
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Problems solved by technology
On the contrary, when the area of the single dot is large, a plurality of dots tend to be connected to each other, so that even when the amount of ink applied per unit area is increased or decreased, it may not be possible to accurately control the amount of ink coated. The surface area of the recording medium
In addition, a plurality of dots tend to be linked to each other, so sometimes blurring of ink tends to occur on the recording medium.
Method used
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[0152] Hereinafter, the present invention is described in more detail by way of examples and comparative examples. However, the present invention is not limited to the following examples as long as it does not depart from the gist of the present invention. The terms "part" and "%" are by mass unless otherwise specified.
[0153] (HLB value and structure of surfactant)
[0154] Determination of the HLB value of the surfactant. Specifically, the HLB value of the main component of each surfactant was calculated by using Griffin's method (the following equation (1)). Table 1 shows the results.
[0155] HLB=20×(the formula weight of the hydrophilic group of the surfactant) / (the molecular weight of the surfactant) (1)
[0156] In addition, table 1 collectively shows the structure of the main component of each surfactant, and when the structure of the surfactant corresponds to general formula (1) or general formula (2), m, n, a and The value of m+n or the value of x, y, b and x+...
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Abstract
An ink set is provided which can suppress bleeding irrespective of the type of recording medium. The ink set includes a plurality of aqueous inks each containing a dye, and has at least a first aqueous ink containing a dye, wherein the difference between the dynamic surface tension of the first aqueous ink at a lifetime of 50 milliseconds and the dynamic surface tension of the first aqueous ink at a lifetime of 500 milliseconds is 7 mN / m or more; and, between the first aqueous ink and at least one type of aqueous ink except the first aqueous ink included in the ink set, dynamic surface tension gammaa (mN / m) of an ink A having relatively higher lightness at a lifetime of 500 milliseconds and dynamic surface tension gammab (mN / m) of an ink B having relatively lower lightness at a lifetime of 500 milliseconds satisfy -5<=(gammaa-gammab)<=3.
Description
technical field [0001] The present invention relates to an aqueous ink, an ink set, an inkjet recording method, an ink cartridge, a recording unit, and an inkjet recording apparatus. Background technique [0002] In recent years, it has been required to improve the quality of images formed by inkjet recording methods on recording media, especially plain paper, specifically, the gradation or color uniformity of images. For example, gradation can be improved by reducing the area of a single dot formed of ink on a recording medium. On the contrary, when the area of the single dot is large, a plurality of dots tend to be connected to each other, so even when the amount of ink applied per unit area is increased or decreased, it may not be possible to accurately control the amount of ink coated. The surface area of the recording medium. In addition, a plurality of dots tend to be joined to each other, so sometimes blurring of ink tends to occur on the recording medium. ...
Claims
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IPC IPC(8): C09D11/00B41J2/01B41M5/00C09D11/328C09D11/38C09D11/40
Inventor 森部镰志工藤智真田干雄山上英树
Owner CANON KK