| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithographic printing plate original plate which is excellent in carrying property and fitting property for printing machines. SOLUTION: For this lithographic printing plate original plate, an image recording layer is provided on an aluminum supporting body which is obtained by applying a surface roughening treatment on an aluminum sheet. The lithographic printing plate original plate is formed into a rectangular cut sheet of which the length in the sheet drawing direction is 600 to 2,000 mm, and of which the width in the vertical direction to the sheet drawing direction is 800 to 1,500 mm. When the cut sheet is placed on a surface plate, the maximum height of a lifted section is 2 mm or lower, the number of lifted sections is three or lower, the total height of the lifted sections is 4 mm or lower on respective vertical edges to the sheet drawing direction. Also, the maximum height of the lifted section is 1.5 mm or lower, the number of lifted sections is three or lower, and the total height of the lifted sections is 3 mm or lower on respective edges being in parallel with the sheet drawing direction. |
