| 摘要 |
PURPOSE:To obtain a material for a lithographic plate having superior resolution and printing resistance by forming a photoconductive layer cntg. an alkali-soluble polymer contg. COOH, condensed polycyclic quinone pigment and an oxadiaoazole deriv. on a hydrophilic substrate. CONSTITUTION:A polymerizing unsatd. monomer such as acrylic acid and other polymerizing monomers, e.g., acrylic acid, methyl methacrylate and butyl acrylate are copolymerized in 25:45:30 ratio of polymerization to prepare a polymer having strength, heat resistance and lipophilic properties. A coating liq. contg. 30-5pts.wt. condensed polycyclic quinone pigment and a 10-40pts.wt. oxadiazole deriv. to 100pts.wt. the polymer is applied to the hydrophilic surface of an Al plate or the like and cured by heating to manufacture a plate for a lithographic plate. This sensitive plate is charged, imagewise exposed, fixed by heating, and washed out with an aqueous soln. contg. sodium silicate and alcohols to obtain a lithographic plate having superior resolution, printing resistance, solvent resistance etc. |
