also: ゆし
noun
oil paper; oiled paper
Paper treated with oil to make it waterproof; used for wrapping, crafts, or traditional purposes.
油紙で包んだおにぎりは、しっとりしていて美味しい。
Rice balls wrapped in oil paper are moist and delicious.
昔の傘は油紙で作られていた。
Old umbrellas were made of oil paper.
Rare reading; the common reading is あぶらがみ.
和紙 is traditional Japanese paper in general, while 油紙 specifically refers to paper treated with oil for waterproofing.
Compound of 油 (oil) and 紙 (paper). The reading あぶらがみ is the standard kun'yomi compound; ゆし is a rare on'yomi reading.