| 摘要 |
<p>An emulsion type surface protective agent for lithographic printing plate made up of an aqueous phase and an oil phase, wherein the oil phase contains at least one of the oxyethylene addition product of a fatty acid having from 12 to 30 carbon atoms and the oxyethylene addition product of the ester of a fatty acid having from 8 to 30 carbon atoms. The surface protective agent for lithographic printing plate has a high environmental safety, can desensitizing the non-imaging portions of a lithographic printing plate and does not cause blinding even when the surface protective agent is stored for a long period of time. Also, the surface protective agent for lithographic printing plate can be coated on a lithographic printing plate without need of water washing the printing plate after developing the printing plate by, e.g., an automatic processor.</p> |
