Script, which hides all navigation bars and starts the print dialog

printSpLibrary.txt

<style type="text/css">
#suiteBar{
	display:none;
	}
#s4-ribbonrow{
	display:none;
	}
#s4-titlerow{
	display:none !important;
	}
#sideNavBox{
	display:none;
	}
#contentBox{
	margin-left:0px;
	}
.ms-viewheadertr {
	display:none;
	}
</style>
<script type="text/javascript">
window.onload = function() { window.print(); }
</script>