Patent ID: 8655252

Claim:
A controlling apparatus for controlling a transparent toner image forming apparatus which forms a transparent toner image on a color toner image fixed on a sheet and then heat-fixes the transparent toner image on the sheet, said controlling apparatus comprising: an information obtaining portion configured to obtain information corresponding to (i) a gloss-adjustment area, including a first part and a second part, where a gloss of the color toner image on the sheet is to be partially adjusted, and (ii) a transparent toner amount per unit area in the gloss-adjustment area; and an image data generating portion configured to generate image data for forming the transparent toner image based on the obtained information; wherein in a case that the transparent toner amount per unit area in the gloss-adjustment area based on the obtained information is not larger than a lower limit amount, said image data generating portion generates the image data so that the transparent toner amount per unit area in an area excluding the gloss-adjustment area within an image formable area of the sheet is a predetermined amount, and so that the transparent toner amount per unit area in the gloss-adjustment area based on the obtained information is increased.