Patent ID: 7132212
Filing Date: 2006-11-07
Classification: B41C,B41N,C25F,Y10S

Abstract:
1. A presensitized plate comprising: a support for a lithographic printing plate including an anodized layer formed on an aluminum plate and a recording layer recordable by infrared laser exposure on the support, wherein in a section of the anodized layer after the recording layer is provided, an atomicity ratio of carbon to aluminum (C/Al) represented by a following formula (1) is 1.0 or less: I I S S wherein the recording layer is formed on the anodized layer directly or through an undercoat layer, and the recording layer is a thermosensitive layer containing a fine particle polymer having a thermo-reactive functional group, or microcapsules containing a compound having a thermo-reactive functional group, a thermosensitive layer using a negative working infrared laser recording material, a thermosensitive layer using a positive infrared laser recording material comprising alkali soluble polymer, a compound dissolved with the alkali soluble polymer to reduce alkaline solubility, and a compound for absorbing infrared radiation, or a thermosensitive layer using a sulfonate type infrared laser recording material.