Heating by Radiation: The electromagnetic oscillations - the heat radiation - produced by an infrared lamp are transferred to the product to be heated without contact and without an intermediate medium. Heating is achieved much quicker than with convection because part of the radiation enters the interior of the product directly, in addition to heating its surface.
 
All heating and drying processes are therefore much faster and put less strain on the product than other heating methods, resulting in higher productivity. The energy loss through convection to the air between product and lamp and through reflection from the heated product is small.