Incremental printing of symbolic information – Ink jet – Medium and processing means
Reexamination Certificate
1997-09-05
2001-06-12
Schwartz, Pamela R. (Department: 1774)
Incremental printing of symbolic information
Ink jet
Medium and processing means
C428S156000, C428S195100, C428S209000, C428S409000
Reexamination Certificate
active
06244701
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a recording medium having high gloss including metallic luster, an image-forming method employing the recording medium, and a printed matter obtained by the image-forming method.
2. Related Background Art
Ink-jet recording is a recording method which conducts recording through steps of forming ink droplets, ejecting the ink droplets, and depositing a part or the whole of the ejected ink onto a recording medium such as a paper sheet or a plastic film coated with an ink-receiving layer. The above ink droplets are formed by various methods such as electrostatic attraction, mechanical vibration or displacement by a piezo-electric element, pressure application by bubbling of ink by heating. The ink-jet recording method is attracting attention because of less noise generation, and capability of high speed printing and multi-color printing.
The ink for ink-jet recording system is mainly composed of water in view of safety, and recording characteristics. Frequently, a polyhydric alcohol is added to the ink to prevent clogging in a nozzle, and to improve ejection stability.
The recording medium for the ink-jet recording includes various kinds of paper sheets, OHP films, glossy paper sheets, glossy films, cloth, etc. The method of feeding of the recording medium has developed, and automatic sheet feeding is mainly employed in place of manual sheet feeding.
The recording mediums conventionally employed include recording sheets for an overhead projector (hereinafter referred to as “OHP”) constituted of a polyester film having thereon a hydrophilic film composed of polyvinyl alcohol of saponification degree of 70 mole percent to 90 mole percent as disclosed in Japanese Patent Application Laid-Open No. 60-220750; recording paper sheets constituted of a base paper sheet having a coating layer containing fine powdery silica and water-soluble binder like polyvinyl alcohol as disclosed in Japanese Patent Publication No. 3-26665; glossy paper sheets constituted of an opaque base material like synthetic paper and having thereon a film mainly composed of a water-soluble resin; and so forth. Further, a cast-coated paper sheet for ink-jet recording having a coat layer formed by casting and mainly composed of silica and a binder is disclosed in Japanese Patent Application Laid-Open No. 63-265680.
As the results of improvements in performance of ink-jet recording apparatus such as a higher printing rate, and multi-color printing, more improvements are required for the ink-jet recording medium. The required properties for the ink-jet recording medium include: (1) higher ink absorbency (larger absorption capacity, and shorter absorption time); (2) capability of giving higher optical density of the printed ink dots without blurring at the dot periphery; (3) capability of giving nearly completely circular dots with smoothness of the dot periphery; (4) less change of properties caused by change of temperature and humidity without causing curling of the recording medium; (5) no occurrence of blocking; (6) capability of maintaining printed images stably for a long term (especially under high temperature and high humidity); and (7) stability of the recording medium itself over a long term without deterioration (especially under high temperature and high humidity). Various recording mediums are demanded with the increase of the printing speed, increase of the image density, development of color printing, and diversification of ink.
The ink-jet recording sheet disclosed in Japanese Patent Publication No. 3-26665 has a mat-like surface appearance without gloss. The glossy paper sheet disclosed in Japanese Patent Publication No. 5-36237 does not exhibit sufficient gloss at non-printed portions although it allows image formation with high gloss and high density in comparison with conventional paper.
Conventional recording mediums have had a specular gloss which tends to increase gradually with increase in specular glossiness when measuring it continuously with an angle of from 20° to 75°, and to reach the maximum at 75°. Therefore, the conventional recording mediums are not satisfactory in dynamic representation of color owing to poor contrast of gloss at a non-printed area, and sufficient gloss of the recording medium can be perceived only when the medium is viewed at an oblique angle since the specular glossiness has reached the maximum at 75°.
Conventional printed matters have had a specular gloss which tends to increase gradually with increase in specular glossiness when measuring it continuously with an angle of from 20° to 75°, and to reach the maximum at 75°. Therefore, the conventional printed matters are not satisfactory in dynamic representation of color owing to poor contrast of gloss at a non-printed area, and sufficient gloss of the printed matters can be perceived only when the medium is viewed at an oblique angle since the specular glossiness has reached the maximum at 75°.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a recording medium which has sufficient gloss for decorativeness and is capable of giving dynamic color representation.
Another object of the present invention is to provide a printed matter of yellow, magenta, and cyan colors which has sufficient gloss for decorativeness and is capable of giving dynamic color representation.
A further object of the present invention is to provide an ink-jet recording medium having metallic luster, to provide a printed matter having metallic luster, and to provide a process for production thereof.
According to the present invention, there is provided a recording medium comprising an ink-receiving layer provided on at least one face of a base material, wherein a surface of receiving layer has the maximum specular glossiness within a measurement angle range of from 20° to 60°.
According to the present invention, there is also privided a printed matter printed with ink dots on a recording medium comprising an ink-receiving layer provided on at least one face of a base material, and at least one of solid printed areas of yellow, magenta, and cyan colors has the maximum specular glossiness within a measurement angle range of from 20° to 60°.
According to the present invention, there is further provided a recording medium comprising a metal foil, an ink-intercepting layer formed at least one face of the metal foil, and an ink-receiving layer formed on the ink-intercepting layer.
According to the present invention, there is still provided a recording medium comprising a film having an ink-intercepting effect, vapor-deposited metal on one face of the film, and an ink-receiving layer provided on the reverse face of the film.
According to the present invention, there is still further provided an image-forming method which forms an image by ink-jet recording system on the aforementioned recording medium.
According to the present invention, there is also still provided a process for the production of printed matter comprising forming a printed matter having metallic luster by ink-jet recording system on the aforementioned recording medium.
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Iwata Kazuo
Kashiwazaki Akio
Moriya Kenichi
Sakaki Mamoru
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Schwartz Pamela R.
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