Inkjet ink set, and method for forming image using same

a technology of inkjet ink and image, which is applied in the direction of inks, coatings, applications, etc., can solve the problems of poor image quality of image forming methods using conventional ultraviolet-curable inkjet systems, and achieve high image quality and gloss. , the effect of high gloss
US20150124031A1Active Publication Date: 2015-05-07KONICA MINOLTA INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KONICA MINOLTA INC
Publication Date
2015-05-07

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Abstract

An inkjet ink set comprising: a color ink including a photocurable compound, a photopolymerization initiator, a gelling agent, and a colorant, the color ink undergoing a sol-gel phase transition depending on the temperature; and a clear ink including a photocurable compound, a photopolymerization initiator, and a gelling agent, the clear ink undergoing a sol-gel phase transition depending on the temperature. The viscosity (η) (CL) of the clear ink at 25° C. is less than ½ the viscosity (η) (CO) of the color ink at 25° C., and the viscosity (η) (CL) of the clear ink is 1×103 mPa·s or greater. Provided is an inkjet ink set by which a printed image offering both high image quality and surface gloss can be formed.
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Description

TECHNICAL FIELD

[0001] The present invention relates to an inkjet ink set and an image forming method using the same.BACKGROUND ART

[0002] From the viewpoint of simple and inexpensive image production, inkjet recording has been used in a variety of printing fields. As the inkjet recording method, there is an UV-curable inkjet method wherein droplets of inkjet ink are landed on a recording medium and then cured by irradiation with ultraviolet rays to form an image. Recently, the UV-curable inkjet method has been attracting attention for its capability of forming images having high rubfastness and adhesiveness even on recording media which lack ink absorbing properties.

[0003] However, the image forming methods using the conventional UV-curable inkjet systems have the drawback of poor image quality due to failure to prevent combining of neighboring dots during high-speed recording such as single pass recoding using a line recording head or high speed serial recording. As one of methods for ...

Claims

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