Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale <stevekale@b...> 
wrote:
> 
> 
> 
> > From: Ernst Dinkla <E.Dinkla@c...>
> 
> >>  
> >> 
> > Possibly though I have some doubts about the consistency of black only
> > printing. Dotgain due to humidity and other changes in time has more
> > impact on black only than on partitioned greys.  This doesn't get better
> > with smaller droplets favored by black only users. More linearisations
> > needed in time.
> 
> My "wish list" would be a little program which could read printed results
> for a particular printer.  See below...
> 
> 
> > 
> > I do wonder whether the two = Matte and Gloss printer profiles are
> > enough considering the Dmax possible in gloss with the 4800 and some
> > paper choices in between (lustre, satin). A bit more fine tuning on the
> > printer profiles like you proposed and adding another choice as a next
> > step ?
> > 
> > Ernst
> > 
> 
> 
> Roy did the existing profiles as generics - they are not constructed from
> actual data and assume a linear greyscale.  My wish would be for a little
> program that, say, read a text file of actual data.  First variable would be
> for the number of observations making up the greyscale readings...21, 51,
> ...256.  Then a list of observations printed by the a particular printer
> with a particular workflow (Epson Adv B&W, QTR, BO....) as measured say with
> Quickread (or similar) in order to construct the kTRC tag.  The list would
> also pick up the media white point wptp tag.  Then you have an ICC profile
> for your printer, your workflow and your ink etc.  Conceptually it is not
> difficult.  Roy or the like can tell us how difficult it would be to
> program....and to find the time to do it..  :-)

Hi Steve,

I've been trying a few things out in this direction.  Unfortunately just changing
the wtpt doesn't seem to do the trick.  What seems to be necessary is to do a
"White Point Compensation" in the profile itself -- analogous to the BPC that the
color engine does.  I have a few more ideas to try.

Roy