I have a problem where all fonts come out too dim. Is there any thing I can do to get a different look and feel from the pdfs?

My tex file looks like

\documentclass[a4paper,twoside]{article}`
\usepackage{graphics} 
\usepackage{color} 
\usepackage{hyperref}  
\usepackage{multirow}
\usepackage{longtable}
\usepackage{fullpage}
\usepackage[pdftex]{graphicx}
\usepackage{fancyhdr}
\oddsidemargin 0cm
\evensidemargin 0cm
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0.0pt}
\rfoot{Raval, Ketan R -13223}

\textwidth 15.5cm
\topmargin -1cm
\parindent 0cm
\textheight 26.5cm
\parskip 1mm


\begin{document}

\fontencoding{\encodingdefault}
\renewcommand{\familydefault}{\sfdefault}
\fontshape{\shapedefault}
\selectfont

So how can I improve my overall look and feel of the pdf?

Thanks