It uses a 220 ml cartrige , NOT refillable (tho you can kludge it , we do) , prices range from about $65 a cart , the versacam uses 4 , CMYK , the soljet uses 12 , 2 x CMYK + Lc LM.
There are bulk fill systems using the same cart , but they can cause problems. (airlocks etc)
Aftermarket inks are available for Solvent based printers using the epson Dx3 heads (Like the Cadet – tho the suppliers of Cadet dont seem to offer low cost , and I find that their carts are pretty expensive – the solvent inks are readily avialable at 1/2 to 1/3rd or less than their price) and so far , I havent seen aftermarket Eco-sol inks (tho mt new printer claims to use the same inks and its about GBP100 per litre , about 65% less than I currently pay , so there is hope!!)
Evidently the Cadet used to use Lyson , but I have heard they now use Inks supplied in Israel , prolly Techink or someone like that , but its pure conjecture.
I think Eco-Sol inks are Tied into Epson , the mnfgrs that use the Epson heads can only use Epson inks as OEM. the whole ink question is a little cloudy at the moment , but undoubtedly will settle down soon