Method for Processing a Lithographic Printing Plate

A method for processing a heat-sensitive positive-working lithographic printing plate material is disclosed which comprises at least two layers: -a first layer comprising an oleophilic resin and/or a vinyl acetal (co)polymer; -a second layer comprising a (co)polymer which is located between the support and the first layer; comprising the steps of: -treating the plate material with an alkaline development solution, -treating the plate material with a first gum solution and consecutively with a second gum solution which are configured as a cascade whereby the second gum solution overflows into the first gum solution; and which gum solutions include a buffer; characterized in that the pH of the first gum solution reaches a steady state value above the pKa value of the (co)polymer present in the second layer.