%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example D-6-3 on page .
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexaplate}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{413.44133pt}
\StartShownPreambleCommands
\usepackage{pst-spectra}
\StopShownPreambleCommands
\begin{document}
\psspectrum[brightness=0.5,gamma=0.6](\linewidth,1)
\psspectrum[axe,brightness=5,element=Hg,lwidth=0.05,Imin=0.05](\linewidth,1)
\end{document}