ay be used a method of treating the support with potassium fluorozirconate disclosed in JP-B No. 36-22063 or polyvinyl phosphonic acid, as disclosed in U.S. Pat. Nos. 3,276,868, 4,153,461, and 4,689,272. [0258] The planographic printing plate precursor to which the invention is applied is a product wherein a positive recording layer is formed on a support.