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From: sfeam <sfeam@users.sourceforge.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: colored lines after set term ... mono
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Date: Fri, 31 May 2013 15:02:57 -0700
Organization: gnuplot development team
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Karl wrote:

> And what would you recommend to get different greyscale lines? Do it in
> colour mode and specify grey RGBs ? I fear this might lead to problems
> with bw printers?
> 

There is a sample color definition file in the distribution:
  .../share/colors_mono.gp

This defines a set of black lines with varying width and dash pattern,
the old-style way of preparing figures for publication before halftone/color
press became common.