Patent 9126420 was granted and assigned to Electronics for Imaging on September, 2015 by the United States Patent and Trademark Office.
In a multi-layer printer, the base white layer that is applied during printing is modified using the image to be printed. By altering the white layer to reflect the density of the top image, it is easier to reach saturation (density/gamut) without adding large amounts of ink. Thus, such undesirable side effects, such as gloss-banding are avoided.