Image forming system with pressure-bonding of folded recording material

An image forming system comprising:

• an image forming unit configured to form an image on a first surface of a recording material and to form an image on a second surface, opposite from the first surface, of the recording material;
• an application unit configured to apply an adhesive onto the second surface of the recording material;
• a folding unit configured to fold the recording material in two so that the second surface, on which the adhesive is applied, is inside;
• a pressure-bonding unit configured to pressure-bond the recording material folded in two;
• and
• a control unit configured to (1) control conveyance of the recording material, (2) cause the image forming unit to form the image on the first surface of the recording material, (3) convey the recording material with the image having been formed on the first surface thereof to the image forming unit again without conveying to the application unit, and cause the image forming unit to form the image on the second surface of the recording material, (4) convey the recording material with the image having been formed on the second surface thereof to the application unit, and cause the application unit to apply the adhesive to the second surface of the recording material and not to apply the adhesive to the first surface, (5) convey the recording material to which the adhesive has been applied to the folding unit, and cause the folding unit to fold the recording material in two so that the second surface is inside, and (6) convey the recording material having been folded in two to the pressure-bonding unit, and cause the pressure-bonding unit to pressure-bond the recording material,
• wherein in a case in which the controller causes the image forming unit to form a first image and a second image,
• (7) when the controller receives an instruction to form the first image on a pressure-bonding side which is an inner of the recording material folded in two, the controller causes the image forming unit to form the second image on the first surface and the first image on the second surface, and
• (8) when the controller receives the instruction to form the second image on the pressure-bonding side, the controller controls an image forming order so as to cause the image forming unit to form the first image on the first surface and the second image on the second surface.