| abstract |
The present invention provides a method for producing a lithographic printing plate support capable of obtaining a lithographic printing plate having excellent cracking resistance and tearing resistance. A support for a lithographic printing plate obtained by subjecting a surface of an aluminum alloy plate obtained through a predetermined continuous casting step and a cold rolling step to a roughening treatment, The molten aluminum alloy used contains 0.1 to 0.7% by mass of Fe, 0.1 to 1.5% by mass of Mn and / or 0.1 to 0.5% by mass of Mg, The peripheral speed of the cooling roller in the continuous casting process: V (m / min), the thickness of the aluminum alloy plate: t (m), the diameter of the cooling roller: D (m), and a number of more than 0 and less than 5: A method for producing an aluminum alloy plate for a lithographic printing plate, wherein A satisfies the following formula (1). V = A × 10 −5 × (D / t 2 ) (1) [Selection figure] None |