| 摘要 |
PURPOSE:To provide wet offset desensitized ink which has excellent desensitizing effect with balanced hydrophlic and hydrophobic properties by containing as desensitizer high class fatty acid ester of polypropylene glycol ethylene oxide additive. CONSTITUTION:A desensitizer is obtained by partially esterifying PPG-EO additive prepared by adding added with 1-10mol of ethylene oxide (EO) to polypropylene glycol (PPG) of 800-5,000 of mean molecular weight, where the EO molar number ratio of the EO molar number with respect to the total molar number of the propylene oxide (PO) in the PPG is 0.01-0.2, so that the esterification rate of the end OH of the PPG EO additive with high class fatty acid (stearic acid) becomes 1/10-1/2. This desensitizer is incorporated in the ink by using vehicle. EFFECT:Wet offset printing can be performed by a lithographic printing machine. |
