A non technical explanation of
PostScript, HP GL/2, GARO and other page description languages
If you have ever clicked the “print” button on your computer
you’ve used a page description language
(PDL). If you’ve worked in the digital printing industry, or
bought a printer at anytime in the past 20
years, the names of the languages may even sound familiar –
PostScript, HP GL/2, PCL, GARO. Yet,
unless you are a programmer writing code for print applications or
an administrator who manages the
printers on a network you are unlikely to have had a reason to
give page description languages much
thought. Page description language technology is so universal and
so reliable that most people are
completely unaware that they are using it every time they click
print
So why write a white paper about PDLs now? Because one of the
oldest and best known page
description languages –- PostScript – is maturing and is slowly
being replaced by new technologies.
Unlike some technologies that come and go quickly, PostScript has
been around for a long time. Some
of your large-format printing customers may be reluctant to give
it up – even if they don’t need it
anymore – just because it is familiar. At the same time because
PostScript is so deeply entrenched in
digital printing technology (and remains useful for certain
applications) it will probably be around for a
long time to come. During this period of technology transition,
some of your customers are going to
look to you for advice. This white paper is therefore intended to
help you gain a better understanding of
what PDL’s are so that you can feel more comfortable discussing
this topic with your customers.
Please note however, this is not a technical guide to PDLs, many
of the technical concepts are greatly
simplified here in hopes of presenting this technology in terms
hat can be easily understood by a wide
variety of people and customers.
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