Image forming system and image forming apparatus

An image forming system, comprising:

• a terminal device and an image forming apparatus, wherein the terminal device comprises:
• a request receiving section configured to receive a print request of printing a toner image on at least one card arranged on a cardboard as a medium;
• and
• the image forming apparatus comprises:
• an image forming section configured to form the toner image on a transfer belt;
• a transfer section configured to transfer the toner image onto the medium;
• and
• a transfer bias applying section configured to apply transfer bias voltage to the transfer section;
• and
• a bias voltage determination section configured to determine the transfer bias voltage according to the print request, wherein
• the bias voltage determination section determines the transfer bias according to the number of cards that pass through the transfer section simultaneously.

An image forming apparatus, comprising:

• an image forming section configured to form a toner image on an intermediate transfer medium;
• a transfer section configured to transfer the toner image onto a medium;
• a bias control section configured to control transfer bias voltage applied to the transfer section;
• a request receiving section configured to receive a print request of printing the toner image on at least one card arranged on a cardboard as the medium;
• and
• a bias voltage determination section configured to determine the transfer bias voltage according to the print request, wherein
• the bias voltage determination section determines the transfer bias according to the number of cards that pass through the transfer section simultaneously.