Digital BW, The Print

And at 60 MegaLux, the Piezography Sepia inks are running the strongest of the monochromatic inks with scores still in the 100s. 

We're resubmitting fresh Neutral K6 tests to Mark, because the starting points of the Neutral K6 ink tests that are now at Aardenburg were not "neutral". They were too blue and too red with *ab values as high as 3.70 rather than -0.35 to 0.35, indicative of a chemistry problem we had in 2009, and not representative of Neutral K6 on HPR which is actually Neutral (-0.35 to 0.35 on HPR). Mark is going to keep this set up with an explanation, when he posts the new.


Jon Cone

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "pr_roark" <roark.paul@...> wrote:
>
> Mark has posted the results for the latest batch of fade tests.  These include the 40 Megalux-Hour results for the 3MK carbon and K6 Neutral inks on H Photo Rag.  See http://www.aardenburg-imaging.com/cgi-bin/mrk/_4346c2hvd19kb2NfbGlzdC80
> 
> The 100% carbon is still looking very good.
> 
> The K6 Neutral sample reached its Conservation Display rating point at 37 MLux hours.  See http://www.aardenburg-imaging.com/documents.html for a link to the PDF that explains this rating.  As I understand it, it's the amount of light exposure the print can take and still look very good to excellent.  37 MLux hours is 18.5 Wilhelm years.  
> 
> This is a heck of a database Mark is putting together.
> 
> (I wonder how a B&W gelatin silver print would do.)
> 
> Paul
> www.PaulRoark.com
>