energy consumption as in example 29 furthermore images free from uneven glossiness could be obtained an electroformed nickel film thickness 50 u03bcm and a fluororesin fep thickness 15 u03bcm were used to produce a substrate and release layer respectively as in example 28 a mixture of fiber like fine nickel particles aspect ratio 100 and a silicone rubber rubber magnetic substance 5 8 by weight was used to produce an exothermic layer the thickness of the exothermic layer was 100 u03bcm the substrate exothermic layer and release layer were laminated in this order to produce a toner fixation film of the present invention and the film was set on the heating fixation apparatus shown in fig2 fixation test was carried out using an electrophotographic color printer provided with the above heating fixation apparatus fig7 although the content of fine particles in the mixture was 80 of that in example 29 fixation could be achieved with the same energy consumption as in example 29 moreover images free from uneven glossiness could be obtained an electroformed nickel film thickness 50 u03bcm and fluororesin fep thickness 15 u03bcm were used to produce a substrate and release layer as they were in example 28 a mixture made by mixing fiber like fine carbon particles coated with nickel in a silicone rubber rubber magnetic substance 5 7 by weight was used to produce an exothermic layer the thickness of the exothermic layer was 100 u03bcm the substrate exothermic layer and release layer were laminated in this order to produce a toner fixation film of the present invention and the film was set on the heating fixation apparatus shown in fig2 fixation test was carried out using.