| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide carbon black for an ink having a bluish color and also a high degree of black color regarding a black pigment for offset printing in the production of printed materials by performing the offset printing on a low density paper such as a non-coated paper and finely coated paper. <P>SOLUTION: This planographic offset printing ink composition consisting of 5 to 40 wt.% carbon black, 20 to 50 wt.% binder resin and as a solvent component, 20 to 70 wt.% single or a combination of≥2 kinds of plant oil and mineral oil is characterized by having 50 to 80% specific coloring power, 30 to 50 m<SP>2</SP>/g nitrogen adsorption specific surface area and 100 to 140 cm<SP>3</SP>/100 g amount of DBP oil absorption of the carbon black. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
