A method for production of an infrared area emitter which can be used for defense against guided missiles with infrared homing heads, for example for ships. According to the invention, an aerosol cloud which is emissive in the infrared range is produced by the reaction of a first primary aerosol composed of an aqueous solution of an electron acceptor with a second primary aerosol composed of an aqueous solution of an electron donor in order to produce the infrared area emitter. The use of primary aerosols such as these leads to emission at 3-5 and 8-14 μm, and does not produce any visual signature either.