| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a printing method which uses ink of process four colors capable of widening a color rendering range (gamut) more than the case in which a Japan color standard ink of the ISO standard is printed, and by which the color range boundlessly nearer to the color reproduction range of RGB than a printed matter using the Japan color standard ink can be reproduced. <P>SOLUTION: The lithographic ink printing method uses inks consisting of a combination of three color lithographic inks of yellow, rouge and indigo, and a black ink. The three colors of the yellow, the rouge and the indigo comprise a combination of the lithographic inks of the yellow ink containing a disazo yellow-based compound as a coloring component, the rouge ink containing a metal lake compound of a rhodamine-based dye as a coloring component, and the indigo ink containing a phthalocyanine-based compound as a coloring component. The black ink contains carbon black and 4-10 wt.% alkali blue lake compound based on the whole weight of the ink. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
