Jan Alter wrote:

The R1800 has produced some beautiful prints in the year I've owned it.
There has been no tendency for clogging even when I've let as much as a
month go by without using it. My biggest annoyance is the expense of its
cartridges and the fact that they are not particularly large. I intend to
remedy that soon, as the OEM ink runs out by using refillable spongeless
cartridges, which are easy and quick to refill, and compatible ink from MIS.


they will not disclose what they are selling. no clogging now but just
wait. and the fact it is pigmented ink makes clogging more probable

Though some may find my decision to go that route wrong I find the
evidence of using other MIS ink incontrovertibly positive to achieving
excellent printing results with cost effective savings.