With StudioPrint v12 Smooth Diffusion software and the amazing ability to fine-tune the black ink transitions, we’ve been able to reach a maximum K dMax of 2.95 (*L value of 1.72) with K3 Photo Black ink on Premium Luster 250 and 260 weight papers with no reflective problems or over-inking. Our maximum printable (limited) K dMax for color images is currently at 2.8-2.85. This is with a converted Epson 9600 printer. Current LightJet prints max out at a dMax of 2.4. Normal Ultrachrome Photo Black Premium Luster dMax is only at 2.2.
The values we are getting are well above those that Epson claims you can get using K3 ink on Premium Luster. Check their statement out here. (Search for dMax)