Solid-ink printing original plate and a process for producing the same
AssigneeHitachi Koki Co., Ltd.
InventorsAtsushi Kakuta, Masatoshi Sakata, Yasuo Takano, Shigenori Suematsu, Yutaka Shoji
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Abstract
A solid-ink printing original plate which comprises a substrate and an image comprising ink dots formed on the substrate, and which is produced by a process comprising the steps of: melting a solid ink that is a solid at a room temperature; and jetting the melt of the solid ink onto a substrate to form ink dots, wherein the solid ink has a penetration index of not more than 5 at a room temperature. Also disclosed is a process for producing the solid-ink printing original plate.
Claims31
A solid-ink printing original plate which comprises a substrate and an image comprising ink dots formed on said substrate, and which is produced by a process comprising:
- melting a solid ink that is a solid at a room temperature;
- and
- jetting a melt of said ink onto said substrate to form ink dots,
- wherein said solid ink has a penetration index of not more than 5 at a room temperature, and
- wherein said ink dots that have solidified on said substrate have a contact angle of between 15° and 45° with respect to said substrate, a height of at least 5 μm, and an aspect ratio of ink dot height to a minor axis size between 0.025 to 1.0.
A process for producing a solid-ink printing original plate comprising:
- melting a solid ink that is solid at room temperature;
- and
- jetting a melt of said solid ink onto a substrate to form ink dots,
- wherein said solid ink has a penetration index of not more than 5 at room temperature,
- wherein said solid ink has a melt viscosity of from 10 to 30 mPa•s upon jetting,
- wherein said ink dots that have solidified on said substrate have a contact angle of between 15° and 45° with respect to said substrate, a height of at least 5 μm, and an aspect ratio of ink dot height to a minor axis size between 0.025 to 1.0.
A solid-ink printing original plate which comprises a substrate and an image comprising ink dots formed on said substrate, and which is produced by a process comprising:
- melting a solid ink that is a solid at a room temperature;
- jetting a melt of said solid ink onto an intermediate medium to form an image of ink dots, and
- transferring said image from said intermediate medium onto a substrate,
- wherein said solid ink has a penetration index of not more than 5 at a room temperature, and
- wherein said ink dots that have solidified have a contact angle of at least 15°.
Dependencies are inferred from the claim text.