noun
backing paper; backing sheet
Paper used as a backing or lining, often in crafts, framing, or stationery.
額縁の裏紙が破れていた。
The backing paper of the picture frame was torn.
noun
paper used on one side; reverse side of single-sided printed paper
Refers to paper that has been printed or used on one side, with the blank reverse side available for reuse. Common in office and eco-friendly contexts.
メモには裏紙を使っています。
I use the back of used paper for memos.