Digital printing for the packaging industry has traditionally meant single-color printing of barcodes, dates and serial numbers, and more recently, developments in electrophotography have led to good quality 4-7 color digital printing of labels.But piezoelectric drop-on-demand inkjet technology is poised to have a significant impact on high-quality color printing of primary and secondary packaging.
Chris Lynn, "Single-Pass Inkjet for High Quality Package Printing" in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP25), 2009, pp 196 - 197, https://doi.org/10.2352/ISSN.2169-4451.2009.25.1.art00055_1