Interleaving paper for radiation sensitive planographic printing plates

摘要

An interleaving paper for laser exposable radiation sensitive planographic printing plate precursors having a radiation sensitive layer is disclosed. The interleaving paper has a stiffness of 100 g or higher and a stiffness per unit thickness of 2.0 g/mum or higher. The interleaving paper can be easily removed by an automatic interleaving paper releasing machine. The printing plate precursor can be made efficiently, even when the interleaving paper is placed directly on the radiation sensitive layer of a laser exposable radiation sensitive planographic printing plate precursor that does not have a mat layer formed thereon. The interleaving paper can also be manufactured at a lower cost. Use of the interleaving paper makes it possible to reduce the distribution cost of the printing plate precursors.