| 摘要 |
An ink for stencil printing is provided, which is improved in pigment dispersibility, free from pigment aggregation at the time of emulsification, and excellent in emulsion stability during storage. The ink comprises a water-in-oil emulsion having 10 to 50 wt % of an oil phase and 90 to 50 wt % of a water phase, wherein the oil phase contains, as a pigment, at least a copper phthalocyanine pigment treated with a specific copper phthalocyanine derivative. The treated pigment can be contained at a concentration of 0.5 wt % or more based on the total weight of the ink. It is desirable that the copper phthalocyanine pigment is treated with the specific copper phthalocyanine derivative of 0.01 to 50 wt %, preferably 2 to 20 wt % based on the weight of the pigment. The particle size of the primary particles of the pigment is preferably in a range of 40 to 360 nm.
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