Usage patterns
〈事〉を紙に書くto write something down on paper
I had them write the phone number down on paper.
紙で〈物〉を折るto fold something out of paper
I folded a crane out of paper.
紙が破れるfor paper to tear/rip
The paper bag tore and its contents fell out.
紙を丸めるto crumple up a piece of paper
He crumpled up the paper he'd been writing on and threw it in the trash.
Expressions
紙の辞書paper dictionary; printed dictionary