Assuming you want to remove a border, etc. from texts, you need to give them a class. Maybe something like:
<input type="text" class="print-clean" .../>
And css loaded by media = "print":
<link rel="stylesheet" type="text/css" media="print" href="/css/print.css" />
will contain something like this:
.print-clean { border: none; background: transparent; }
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