| abstract |
Disclosed is a positive-working, radiation-sensitive recording material for the production of planographic printing plates, comprising an aluminum support and a radiation-sensitive layer coated thereon, whereinn the aluminum support has been grained in nitric acid, then pickled in sulfuric 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 comprisesn 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, b) a novolak or a polycondensation product obtained by reacting a polyphenol with an aldehyde or ketone, as an alkali-soluble resin, c) a vinyl-type polymer comprising at least one unit having a lateral hydroxyphenyl group, d) a clathrate, e) a low-molecular weight compound which comprises at least one acidic hydrogen atom, and f) silica gel particles having a maximum diameter of 15 µm. |