Image forming system

An image forming system comprising:

• a color image forming apparatus including a color image forming portion for forming a color toner image on a surface of a recording material;
• a first fixing device including a first fixing member for fixing the color toner image on the surface of the recording material by heating, at a first fixing portion, the surface of the recording material on which the color toner image is formed immediately before by the color image forming portion;
• a second fixing device including a second fixing member for heating, at a second fixing portion, the surface of the recording material heated immediately before by the first fixing member;
• and a switching mechanism for switching a conveyance direction of the recording material passing through the first fixing portion to a direction toward the second fixing portion or to a bypass direction of the second fixing portion;
• a transparent image forming apparatus including a transparent image forming portion capable of forming a transparent toner image on the surface of the recording material on which the color toner image is fixed by said color image forming apparatus;
• and a third fixing device including a third fixing member for fixing the transparent toner image on the surface of the recording material by heating, at a third fixing portion, the surface of the recording material on which the transparent toner image is formed immediately before by the transparent image forming portion;
• and
• a controller for controlling the switching mechanism so that the conveyance direction of the recording material is, when the surface of the recording material, on which the color toner image is formed immediately before by the color image forming portion, is to be subjected to formation of the transparent toner image by said transparent image forming apparatus, switched to the bypass direction of the second fixing portion, and so that the conveyance direction of the recording material is, when the surface of the recording material, on which the color toner image is formed immediately before by the color image forming portion, is to be not subjected to formation of the transparent toner image by said transparent image forming apparatus, switched to the direction toward the second fixing portion.