Color emulsion ink for stencil printing
AssigneeRiso Kagaku Corporation
InventorsYoshihiro Hayashi, Hirotoshi Yonekawa
Life of this patent
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Abstract
A color W/O emulsion ink for stencil printing includes a plurality of kinds of chromatic pigments different from each other in hue. The total amount of the chromatic pigments is not smaller than 1% by weight and not larger than 10% by weight of the total weight of the ink. The content of at least one of the chromatic pigments is smaller than 1% by weight and at least one of the chromatic pigments the content of which is smaller than 1% by weight is a specific pigment selected from the group consisting of anthraquinone series pigments, perinone.perylene series pigments, phthalocyanine series pigments, dioxazine series pigments, quinacridone series pigments and isoindolinone series pigments.
Claims6
A color W/O emulsion ink for stencil printing including a water phase and an oil phase and including a plurality of kinds of chromatic pigments different from each other in hue, the total amount of the chromatic pigments being not smaller than 1% by weight and not larger than 10% by weight of the total weight of the ink, wherein the improvement comprises:
- the W/O emulsion ink includes the plurality of chromatic pigments and the content of at least one of the chromatic pigments is smaller than 1% by weight and at least one of the chromatic pigments the content of which is smaller than 1% by weight is a specific pigment selected from the group consisting of anthraquinone series pigments, perinone.perylene series pigments, phthalocyanine series pigments, dioxazine series pigments, quinacridone series pigments and isoindolinone series pigments.
A color W/O emulsion ink for stencil printing including a water phase and an oil phase and including a plurality of kinds of chromatic pigments different from each other in hue, the total amount of the chromatic pigments being not smaller than 1% by weight and not larger than 10% by weight of the total weight of the ink, wherein the improvement comprises:
- the oil phase includes the plurality of chromatic pigments and the content of at least one of the chromatic pigments is smaller than 1% by weight and at least one of the chromatic pigments the content of which is smaller than 1% by weight is a specific pigment selected from the group consisting of anthraquinone series pigments, perinone.perylene series pigments, phthalocyanine series pigments, dioxazine series pigments, quinacridone series pigments and isoindolinone series pigments.
Dependencies are inferred from the claim text.