layer needs a material capable of forming a porous layer representative materials capable of forming a porous layer are vinyl resins such as polyvinyl chloride polyvinyl acetate plyvinyl fluoride polyvinyl outyral polyvinylidene chloride polyvinyl alcohol vinyl chloride vinyl acetate copolymer vinyl chloride vinylidene chloride copolymer and the like acrylic resins such as polyacrylate polymethacrylate and the like cellulose series resins such as ethyl polystyrene polyethylene gelatin gum arabic and the like these may be used in combination according to the present invention when the multi type heat sensitive transferring medium is used there is not formed any rubbing smearing upon delayed sending of the medium and sharp transferred images can be obtained in addition rewinding of the medium is not necessary the multi type heat sensitive transferring medium can produce much more printing than the one time type medium resin or wax used in an overcoating layer may be the same as that used as a binder material in the heat melting ink layer which the overcoating layer overlies the practice of the invention is further illustrated with reference to the following non limiting examples a stick preventing layer composed of sodium stearate was formed on the upper surface of a polyester film of 3 microns thick carnauba wax 30 parts by weight ester wax 35 parts by weight carbon black 25 parts by weight and oil 10 parts by weight were mixed in a heated roll mill the resulting heat melting ink was applied to the under surface of the polyester film to produce a heat melting ink layer then a coating material composed of carnauba wax 50 parts by weight and ester.