| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently reduce the elongation of a printing plate even when printing is performed in large quantities and to enable printing of high image quality in large quantities by providing specific shear breaking strength to printing raw paper using an ink permeable synthetic fiber nonwoven fabric as a support. SOLUTION: The flowability of ink in printing base paper is changed by the bonding strength or adhesion point density between fibers constituting a nonwoven fabric, a fiber arranging state or the like but a printing plate elongating phenomenon is suppressed by using printing base paper 1 with a shear breaking strength of 3.0 kgf or more. Further, a more pref. range of shear breaking strength is 6.0 kgf or more. In the case of a laminate of a nonwoven fabric and a plastic film, the thickness of the plastic film is pref. 0.5μm or more from a viewpoint of printing durability and pref. 5μm or less from an aspect of perforation properties.
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