Digital BW, The Print

Mark schreef:

> The commendably high L* value and the near
> neutral a* and b* values are impressive. Max printed black was a
> little higher than I'm used to seeing with Epson MK inks, coming it
> at 19.4 for a color print sample made on an Epson 7900 with HDR ink
> set, whereas HPR typically measures about 17. However, the L* range
> from media white to printed black is essentially the same. Most
> viewers will respond favorably to the brighter white point, again a
> very impressive achievement considering it's getting no "boost" from
> OBAs.
> 
> cheers,
> 
> Mark http://www.aardenburg-imaging.com


The dynamic range is important. I expect that the MK inks still can 
block the reflectance of paper whites whatever value the last have. 
Blocking power becomes a problem with transmitted light and hardly ever 
with reflecting surfaces. With pigment inks it is usually the reflection 
of the black ink itself that sets the Dmax and not its blocking 
capacity. Another not always visible limit is the micro banding of a 
black patch, very fine white-grey lines influence the density reading 
considerably. The same ink amount spread uniform gives a much higher 
density.

Mike's Eboni R1900 gives an L 15 -15.3 Dmax which is nice.



-- 
Met vriendelijke groeten,   Ernst


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