Highest dmax of HP Vivera inks (9180, 3100z) on matte paper?

Loris Medici said:

Hi all,

I wonder what is the highest dmax obtainable from Vivera inks on matte paper?

Today a friend of mine said that they're getting log 1.9 dmax w/ matte paper (densitometer zeroed on that particular paper's white) and I find this unbelievable! Did the printer / ink technology evolved that much indeed?

Back when when I was printing using Piezography Selenium Tone inks the best I could get was something around log 1.6...

Thanks in advance,
Loris.

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