Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Michael King <drmrking@...> wrote:
> >>K as gray curve produced very weak 100% spot, it had L 12 and 95% spot
> was 3.2.
> 
> Ok from my experience with HPPK you have to use very little GLOP (5%) with
> the darker 50% of the tones, or it increases the L* reading.
> HPPK is very sensitive to GLOP %.  I am getting L*<2 with IGFS and Epson
> Exhib.

Michael, I didn't use glop in the same pass with inks, and I measured prints without glop. I believe problem with 100% HP PK relates to my printer (2200), when I was printing BO with this ink on 1400, it produced very decent DMax and low banding. In my setup I have undiluted HPPK as toner with density 100 and UT7 C as Gray ink also with density 100, both inks are at default limit, so these two printed together. Somehow paper takes more inks this way -- none of two inks can reach DMax that high when used solo.

>You'll get much more neutral result from the following;
>
>K - 100% Eboni
...
>LM - 4% HPPK

Your setup uses mostly HP PK, right? I am pretty happy with Eboni on matte, I was intended to use minimum of HPPK, just to cool down lighter tones. Could you show DMax and Lab b curve for your setup?

--Sergei