A new printing process called ELPHI (
G. Bartscher, J. Breithaupt, B. Hill, "ELPHI, A New Approach to Electrophoretic Imaging" in Journal of Imaging Science and Technology, 1996, pp 14 - 18, https://doi.org/10.2352/J.ImagingSci.Technol.1996.40.1.art00005