As Nigel reponded, that was the MIS Associates (www.inksupply.com) "EZ" inkset. The K could be MK or PK. The "color" positions were all filled with a dilute carbon ink (PK) that was slightly lighter than LK. As a practical matter, LK works fine in the "color" positions. The basic approach goes back to the C82, and I updated it for the WorkForce 1100. It'll probably work on any Epson that has only the C,M and Y color inks (no dilute colors).
Paul
On Sat, Dec 3, 2016 at 12:39 PM, ann clancy jaclancy1937@yahoo.com [DigitalBlackandWhiteThePrint] <DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:
Years ago there where all gray inks available for this printer.A student of mine wants to tinker with the c88 with all black inks but i don't remember the name of the company that would supply these carts.anyone else remember?thanksann