| 摘要 |
A presensitized plate having a long press life and excellent resistance to scum and corrosive micro-stains and capable of on-press development is provided. The presensitized plate includes a photosensitive layer containing (A) a sensitizing dye, (B) a polymerization initiator, (C) a polymerizable compound, and (D) a binder polymer; and a protective layer which are formed on a support in this order. The support is prepared from an aluminum alloy plate containing intermetallic compound particles with a circle equivalent diameter of 0.2μm or more at a surface density of 35,000 pcs/mm2 or more and aluminum carbide particles with a maximum length of 1μm or more in an amount of up to 30,000 pcs/g.
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