All  colors used in this printer are pigment inks.   A Gloss Optimizer channel is added to equalize the differences in gloss level between dark and lighter areas. This results in a more even sheen.

Because of the way an inkjet printer works, a small quantity of matte black color ink is still used during maintenance functions even if you print mainly with photoblack.

The products in this grouping are all compatible with Epson Stylus Photo
R1900. The ARC chips on this can take advantage of the manual ARC resetter.
E8C
E8C CARTRIDGE FORMULATION
CYAN T087220 E2080P
MAGENTA T087320 E6115P
YELLOW T087420 E7055P
PHOTOBLACK T087120 E1122P
ORANGE T087920 E6150P
RED T087720 E6116P
Gloss Optimizer T087020 E0824P
MATTE BLACK T087820 E1082P