| 摘要 |
PROBLEM TO BE SOLVED: To provide an original plate for heat sensitive lithographic printing, which is capable of printing by mounting the same directly on a printing press without applying any treatment after exposure, excellent in resistance to printing and, further, having a substrate of aluminum, improved in the sensitivity of the same. SOLUTION: This original plate for heat sensitive lithographic printing is provided on the aluminum substrate of the same with a hydrophilic layer, containing a micro-capsule, including a lipophilic constituent as well as a hydrophilic binder and converted into an image unit by heat. The aluminum substrate is characterized by comprising an anodized film of 2 g/m2 or more, which is treated through sealing treatment having the sealing rate of 50% or more. |
