Just opinions:
With regard to printed output, with a 5 year old Brother MFC laser printer, Michael's test_silhouette.pdf is superb,
(although it looks a little too "harsh" or "sharp" on my samsung monitor, in my opinion.) I gather it is "10X?

I think the "3X" 3x silhouettes.png of Martin look good (better) on the monitor, but the printout is not so good, the lines are printed
jagged. One of the vertical lines is partly light blue on the monitor, for the latter two png of Martin.

- Brian

Edit: I see that Michael's pdf had about ten times the resolution...