An ID card base is made by a method wherein a transfer leaf having at least an image receiving layer 7 receiving a dye image of sublimation or thermal diffusion properties is transferred by a thermal transfer recording method onto an information recording body B prepared by stacking at least a first sheet member 1 and a second sheet member 2 on the opposite sides of a center core layer A. IDカード基材は、センターコア層Aの両面に少なくとも第1のシート部材1と第2のシート部材2を積層した情報記録体Bに、熱転写記録法で昇華もしくは熱拡散性染料画像を受容する受像層7を少なくとも有する転写箔を転写して作成する。 - 特許庁