Digital printing so far is mainly used for transfer of information. Due to the high quality of today's full color digital presses applications become more important where not only an information transfer is done. Examples are discussed where toners have an additional function besides imaging:In full color book printing e.g. aesthetic viewpoints become relevant. It maybe necessary that toner – like printing inks – transmit other info to the user like perfume smell.Products preferably should be packed visible for the customer that means by use of transparent foils. Vegetables and specially packed products made of meat of vegetables tend to deteriorate under influence of light (and oxygen). Small amounts of natural dyes are incorporated into a substantially clear toner to absorb damaging wavelength ranges.
Detlef Schulze-Hagenest, Dinesh Tyagi, "Functional Toners for Five Module Digital Press" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP20), 2004, pp 139 - 142, https://doi.org/10.2352/ISSN.2169-4451.2004.20.1.art00035_1