cincinnati, oh april 7, 2015 michelman has introduced the latest addition to its line of hprecommended digiprime digital press primers. waterbased digiprime 680 is formulated for use with the hp indigo ws6x00 series of digital presses and is particularly effective for flexible packaging printing applications. it improves ink receptivity on most types of film, exhibits good lamination bond strength, and improves printing performance on shrink sleeves.  customers with existing ws6x00 presses will require an upgrade kit from hp to run digiprime 680.