On-foil object color adjustment device, image forming apparatus and non-transitory recording medium storing a computer readable program

An on-foil object color adjustment device, comprising:

• a data receiver that obtains non-bonded area data relating to a non-bonded area within a foil area, wherein
• the non-bonded area is an area where foil is not bonded in the foil area after foil-bonding is carried out for a printable recording medium, and
• the foil area is an area where a foil-bonding object is printed on the printable recording medium by using a foil-bonding toner and in which the foil-bonding is carried out after the foil-bonding object is printed;
• and
• a hardware processor that:
• calculates a ratio of a size of the non-bonded area to a size of the foil area based on the non-bonded area data obtained by the data receiver;
• calculates, based on the calculated ratio, a color of the non-bonded area, a color of the foil, and color data of an on-foil object, a first influence degree indicating an influence of the non-bonded area on a color of the on-foil object to be printed in the foil area after the foil-bonding;
• and
• adjusts the color data of the on-foil object based on the calculated first influence degree.