Image forming apparatus and control method of image forming apparatus efficiently during decolorization

A control method of an image forming apparatus including a paper feeding transport unit configured to transport a print medium, the paper feeding transport unit includes a fixing transport path and a decolorizing transport path, an image forming unit configured to form a toner image on the print medium, a heating member, a first pressurizing member configured to form a fixing nip for fixing with the heating member, a second pressurizing member configured to form a decolorizing nip for decolorizing with the heating member, and a processor, the method comprising:

• causing the processor to
• control the heating member to a first temperature;
• and
• allow the print medium on which the toner image is formed by a first toner to pass through the fixing nip by the fixing transport path, and allow the print medium on which an image is formed by a second toner, which is fixed at a second temperature lower than the first temperature and is decolorized at a third temperature which is higher than the second temperature and lower than the first temperature, to pass through the decolorizing nip by the decolorizing transport path, the print medium on which the image is formed by the second toner is different from the print medium on which the toner image is formed by the first toner.