A method for reduction of differential gloss as found in halftone image
hardcopy prints. The method comprises selecting either a single halftone
or employing two halftones: a first halftone having a high apparent gloss
characteristic; and a second halftone having a low apparent gloss
characteristic. A determination is then made of which areas of the
halftone image correspond to potentially high gloss and low gloss regions
under normal printing conditions. An overlay of clear toner is applied to
the hardcopy print of the halftone image. In one approach a single
halftone is employed to control the physical area coverage of the applied
clear toner layer so as to adjust the local gloss across for the
determined regions and thereby balance the evenness of gloss across the
entire hardcopy print of the halftone image. Greater physical area
coverage is provided as controlled by the single halftone in low gloss
regions, and corresponding less physical area coverage is provided in the
low gloss regions. In a further approach two halftones are employed. The
first halftone is directed to those portions of the overlaid clear toner
determined as corresponding to potentially low gloss regions of the
halftone image, and the second halftone is directed to those portions of
the clear toner layer determined as overlaying potentially high gloss
regions of the halftone image.