Fusing block The toner image placed on the paper during transfer adheres to the paper by static electricity, and a light touch will smear the image. During fusing, the four toner colors are melted on the paper to create a permanent image. 12. Fusing The surfaces of the upper and lower fusing rollers are coated with silicone, which has excellent offset prevention performance. The upper fusing roller is charged with a negative DC bias to repel the toner and help prevent the toner on the paper from adhering to the roller. Figure 36. Fusing the toner EN Image formation 153