| 摘要 |
Disclosed is a positive-working, radiation-sensitive recording material for the production of planographic printing plates, comprising an aluminium support and a radiation-sensitive layer coated thereon, wherein the aluminum support has been roughened in nitric acid, anodized in sulfuric acid, and subsequently hydrophilized with a compound comprising at least one unit with a phosphonic acid or phosphonate group and the radiation-sensitive layer comprises a) a radiation-sensitive ester of 1,2-naphthoquinone-2-diazide-4- or -5-sulfonic acid and a polycondensate having phenolic hydroxy groups, said polycondensate being obtained by reacting a phenolic compound with an aldehyde or ketone, as an alkali-soluble resin a novolak or a polycondensation product obtained by reacting a polyphenol with an aldehyde or ketone, a vinyl type polymer comprising at least one unit having a lateral hydroxyphenyl group, a clathrate, a low-molecular weight compound which comprises at least one acidic hydrogen atom and silica gel particles having a maximum diameter of 15 mum.
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