| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a penetrative drying type lithographic printing ink which does not change the concentration, when printed, and can easily be operated. <P>SOLUTION: This penetrative drying type lithographic printing ink comprises a colorant, a binder resin, a vegetable oil and/or a vegetable oil ester, a petroleum solvent, and 0.05 to 4.0 wt.% of a non-ionic surfactant having an HLB value (20×mol.wt. of a hydrophilic portion/mol.wt. of the non-ionic surfactant) of 1 to 6. Thereby, the emulsion of the ink on a roller is inhibited to reduce the changes of concentration on a printed paper surface. Since the stable printed paper surface is obtained, alarms in a paper surface tester and the frequency of paper ejection treatments can remarkably be reduced. Additionally, since the frequencies of ink outputs and the adjustment of dampening water supply amounts can be reduced, the loads of an operator can also be reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
