o make the Colorific grade, Pro 55U inks go through intensive in house testing to ensure they are of a consistently high quality. This makes the switch to Pro 55D simple and painless for users.
Colorific Pro 55U Inks are compatible with all HP 5000/5500 UV printers that currently use OEM inks – HP 5000/5500 (UV) series
HP printers not currently using OEM inks can be converted, but will need flushing. – Some other third party inks may not require flushing, if you wish to mix with another ink please ask before purchase.