Need some clarification, please. Now when you search for Epson's pigment inks there are three variations instead of two:
Ultrachrome
Ultrachrome K3
Ultrachrome HDR
My question is with regard to only the three black inks in each set...
Are they the same across the three name changes, or are there actually differences between them? If so, what is the difference between say, an UC matte black, a UCK3 matte black and of course the new HDR?