| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a printing method which uses 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 is expressed by carrying out the printing with five-color ink by further adding purple ink. <P>SOLUTION: The lithographic ink printing method uses inks selected from five color inks by combining a combination of four color lithographic inks of yellow, rouge, indigo and black, with an ink containing a pigment having a specific purple hue in the lithographic ink printing method using inks selected from the yellow, rouge, indigo and black inks. With respect to three colors excluding black, the yellow ink contains a disazo yellow-based compound as a coloring component, the rouge ink contains a metal lake compound of a rhodamine-based dye as a coloring component, and the indigo ink contains a phthalocyanine-based compound as a coloring component. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
