| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat sensitive lithographic printing original film with an aluminum support, which can be directly installed to a printing machine and printed without treatment after exposure and is excellent in plate wear and stain resistance and, in addition, the sensitivity of which is improved. SOLUTION: This heat sensitive lithographic printing original film on the aluminum support, an ink accepting layer (a) and a hydrophilic layer (b) containing the colloidal particle-like oxide or hydroxide of at least one atom selected from the group consisting of beryllium, magnesium, aluminum, silicon, titanium, boron, germanium, tin, zirconium, iron, vanadium, antimony and transition metals under the condition that at least either one layer between the ink accepting layer and the hydrophilic layer includes a photothermal converting agent. In addition, in the aluminum support, a sealing pore treatment is applied so as to bring the mean pore diameter to be 15 nm or less after the enlarging treatment of the micro-pores of an anodized film and, at the same time, to obtain the anodized film having the basis weight of 2 g/m2 or more. |
