Patent ID: 8150280

Claim:
An image forming system comprising: an image forming station for forming a transparent image on a recording material with transparent toner; obtaining means for obtaining a transparent image for specifying an area for forming, on a part of the recording material, a mark which is visible by a difference in glossiness; a selecting portion for selecting one of image forming modes including a first image forming mode in which a glossiness of the transparent image obtained by said obtaining means is relatively high, and a second image forming mode in which a glossiness of the transparent image obtained by said obtaining means is relatively low; and control means for controlling an amount of the transparent toner, per unit area, of the transparent image formed on the recording material in accordance with the image forming mode selected by said selecting portion, wherein said control means controls the amount of the toner per unit area for the transparent image formed on the recording material in accordance with a kind of the recording material and the image forming mode selected by said selecting portion.