A color image forming apparatus forms a color image on a recording medium
by using a toner including a binding resin, a coloring agent and infrared
ray absorbent, and a light source for causing the toner to melt. The light
source has a plurality of light emission peaks having wavelengths of
.lambda.1, .lambda.2, .lambda.3, . . . , .lambda.n in a range of 500 nm
through 3000 nm. Setting is made such that the following relationship is
satisfied: .vertline..lambda.1-.LAMBDA.1<100 nm, and, also,
.vertline..lambda.2-.LAMBDA.2.vertline.<100 nm, where .LAMBDA.1 and
.LAMBDA.2 denote absorption peak wavelengths of said infrared ray
absorbent.
