Does overwriting a line write it twice?

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From	JohnF <john@please.see.sig.for.email.com>
Newsgroups	comp.lang.postscript
Subject	Does overwriting a line write it twice?
Date	Mon, 1 Dec 2014 12:40:28 +0000 (UTC)
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Suppose you mave something like
  r1 g1 b1 setrgbcolor
  w1       setlinewidth
  x1 y1    moveto
  x2 y2    lineto
  r2 g2 b2 setrgbcolor
  w2       setlinewidth  %%% with w2<w1
  x1 y1    moveto        %%% ----------
  x2 y2    lineto
So you're drawing a different color narrower line 
inside a wider line.
   Does this line get written twice? In particular,
if printed on an inkjet, is ink laid down along the
entire w1-wider line, and then ink laid down again
on top of that along the w2-narrower line?
   If so, would a ps2pdf (and then printing the pdf)
stop that? Or how would you stop that from happening?
That is, just lay down ink once, in color r2,g2,b2
inside the w2-narrower line, and in color r1,g1,b1
along the outside edges between w2 and w1.
   gv'ing a ps file with those instructions looks
like the narrow-inside-wide line is only written once,
but I can't slow down the computer enough to be sure.
However, when printed, the narrow inside line looks
a little darker than intended, though that could
just be printer settings, etc. Thanks,
-- 
John Forkosh  ( mailto:  j@f.com  where j=john and f=forkosh )

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Does overwriting a line write it twice? JohnF <john@please.see.sig.for.email.com> - 2014-12-01 12:40 +0000
  Re: Does overwriting a line write it twice? ken <ken@spamcop.net> - 2014-12-01 14:02 +0000
    Re: Does overwriting a line write it twice? JohnF <john@please.see.sig.for.email.com> - 2014-12-02 05:18 +0000
  Re: Does overwriting a line write it twice? jdaw1 <jdawiseman@gmail.com> - 2014-12-01 12:39 -0800
    Re: Does overwriting a line write it twice? JohnF <john@please.see.sig.for.email.com> - 2014-12-02 05:27 +0000

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