According to the present invention there is provided a heat ode imaging element for making a lithographic printing plate having n a lithographic base with a hydrophilic surface a first layer including a polymer, soluble in an aqueous alkaline solution and a top layer on the same side of the lithographic base as the first layer which top layer is IR-sensitive and unpenetrable or insoluble for an alkaline developer wherein said first layer and said top layer may be one and the same layer and said first layer and said top layer being the imaging layers; characterized in that said imaging layers have a glass transition temperature of at least 57° C.