Re: [Gimp-print-devel] New dither codes

[Robert L K. <rl...@al...>]

   Date: Sat, 29 Apr 2000 16:05:32 +0200
   From: Thomas Tonino <tt...@bi...>

   Other results: I went from rotating and inverting the matrix to just
   shidting it in X and Y directions. For ordered dither, this made no big
   difference, but the splotches are not colored any more. I think I know
   where the splotches originate from. If I print a white-to-black wedgeit
   really prints as a white-to-grey, then grey-to-darkgreen, then
   green-to-darkgrey (that dark grey is a bit lighter than the green) and
   then to black. This is on Canon coated paper, but plain paper is
   similar. It seems black has to be added earlier than it is now - at
   least it has to be added in larger amounts.

Actually, at least for photo printers I think it's the cyan that's the
problem -- the difference in darkness between the dark and light cyan
inks is just too great.  That, of course, doesn't apply to you.
However, when I printed my test shot using no light inks (emulating a
600), I got much more accurate grays (very little green tint).