I agree that the waterproof properties of this ink are unique. What makes this ink amazing, however, also can make it a nightmare. I recommend the following to my customers considering a DuraBrite system:
Print often. DuraBrite is pigmented, so the ink is thicker and more prone to clogging in an under-used printhead.
DuraBrite ink does not set up well on glossy or coated papers. Allow longer drying times. It's just as well, though, as I find the emphasis is on "Dura"... not "Brite". I personally find the colors muted and not as brilliant as Epson's other ink.
Ink is expensive. Even a bulk refiller can expect to pay up to $300/gallon for a quality compatible ink. This can lead to unscrupulous people selling cartridges that can physically fit the printer, but contain inferior ink.
But if archival and waterproof inks are your priority, DuraBrite's the one.
Source(s):
Ink refill biz