E4A_D CARTRIDGE FORMULATION
PHOTOBLACK T126120 E0190D
CYAN T126220 E2025D
MAGENTA T126320 E0693D
YELLOW T126420 E0762D
These printers are technically pigment ink printers. Many users acquiring these printers for general pupose use are likely seeking low cost of operation. Since pigment ink is considerably more costly than dye ink, many will want to use the less costly option of dye. This option is highly recommended as not only is it more economical but will actually render the printer to be more reliable with less clogging and other sediment issues related to pigment ink. The key tradeoff is that pigment ink will not fade for decades. For many users the no fade issue for general printing is very far down the list. Pigment ink is more water resistant as well. So that is also a consideration.

For those that want to retain their printer as a pigment ink printer, that option is also offered.
E4ADyebase
Economical Dye Inkset
E4A_P CARTRIDGE FORMULATION
MATTE BLACK T126120 E1082P
CYAN T126220 E2070P
MAGENTA T126320 E6104P
YELLOW T126420 E7031P
Archival Pigment Inkset