Image formation apparatus and image formation method for forming an image on a folded print medium

An image formation apparatus, comprising

• a first image formation section configured to form a first developer image for an image based on image data;
• a second image formation section configured to form a second developer image for adhesion with a colorless developer;
• a transfer section configured to transfer the first developer image and the second developer image onto a print medium;
• a folding section configured to fold the print medium to which the second developer image is transferred such that the colorless second developer image is located between two faces facing each other when the print medium is folded;
• and
• a fixation section configured to fix the first and second developer images on the print medium which is folded such that the two surfaces of the folded print medium facing each other adhere to each other with the second developer image,
• wherein the colorless second developer image is transferred to entire image formable regions in both two surfaces facing each other when the print medium is folded.

An image formation method, comprising:

• a first step of transferring a first developer image for an image onto an upper side of a print medium transported along a predetermined transport path, the first developer image being formed based on image data corresponding to the upper side;
• a second step of transferring a second developer image for adhesion onto a region in the upper side where the first developer image is not transferred;
• a third step of folding the print medium already subjected to the second step;
• a fourth step of performing fixation of the print medium already subjected to the third step;
• a fifth step of reversing the upper side and a lower side of the print medium already subjected to the fourth step and guiding the print medium to the predetermined transport path, wherein
• the first to fifth steps are performed one or more times.

An image formation method, comprising:

• a first step of transferring a first developer image for an image onto an upper side of a print medium transported along a predetermined transport path, the first developer image being formed based on image data corresponding to the upper side;
• a second step of performing a fixation of the print medium already subjected to the first step;
• a third step of reversing the upper side and a lower side of the print medium already subjected to the second step and guiding the print medium to the predetermined transport path;
• a fourth step of transferring the first developer image for the image onto the upper side of the print medium already subjected to the third step, the first developer image being formed based on image data corresponding to the upper side;
• a fifth step of performing a fixation of the print medium already subjected to the fourth step and then guiding the print medium to the predetermined transport path;
• a sixth step of transferring a second developer image for adhesion onto a region where the first developer image is not transferred in the upper side of the print medium transported in the predetermined transport path;
• a seventh step of folding the print medium already subjected to the sixth step;
• an eighth step of performing a fixation of the print medium already subjected to the seventh step;
• a ninth step of reversing the upper side and the lower side of the print medium already subjected to the eighth step and then guiding the print medium to the predetermined transport path, wherein
• the sixth to ninth steps are performed one or more times.