| 摘要 |
<p>PURPOSE:To obtain the title composition which scarcely suffers problems in an actual use on an electronic blackboard and can give a clear copy by mixing a green pigment with an organic solvent and a resin and a release agent both soluble in the solvent and specifying the lightness of its writing. CONSTITUTION:This composition comprises a green pigment (e.g., Phthalocyanine Green, especially, a processed pigment formed by coating the surface of a pigment with a resin), an organic solvent (e.g., ethanol) and a resin (e.g., rosin) and a release agent (e.g., liquid paraffin both of which are soluble in the solvent and is adapted so as to give a writing of a lightness (Y value: %) <=40. In this way, a green ink which scarcely suffers problems in an actual use and can give a clear copy can be obtained.</p> |
