[Gimp-print-devel] Re: Epson 870

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

   Date: Mon, 15 May 2000 22:30:18 +0000
   From: Jean-Marc Verbavatz <ver...@if...>

   OK, this is kind of what I have found too, although I didn't find
   that 1440-enhanced whas _that_ bad. It could be a matter of density
   or paper quality as well in that particular case.

Try colors.tif at 1440-enhanced.  There's a very noticeable problem there.

   I think you're right, but a little more light ink would help reduce grain.
   In the version you've tried, I had basically pushed the light-ink button all
   the way down and this is obviously not good. This is how I see the issue:

   1 - there's no issue as long as there's no oversampling.

   2 - With oversampling, any ink value between density/oversampling
   and density

   should work in theory. The former will need to be printed several
   times, the latter only once in a while. The former will give better
   smoothness, the latter better color values. The former will be more
   sensitive to artifacts, like additive errors or soaking the
   paper. Current gimp-print is on the latter side; the safe side,
   whereas my test shot is the former. The issue as I see it, is to
   find a good and stable compromise.

Actually, the current stuff in the repository tries to maintain a
constant density (in terms of number of ink drops/unit area) above a
certain minimum.  It's possible that the calibration isn't right...