A copying apparatus detects a non glossy portion (K, M, C, or Y) and a
glossy portion (T) of a document based on image data output from a reader
unit. The copying apparatus forms an image of the detected non glossy
portion (K, M, C, or Y) with a colored toner and an image of the detected
glossy portion (T) with a transparent toner, on a sheet, based on the
image data output from the reader unit.