brown paper
noun1
Usually A strong, coarse, brown-coloured paper, not heavily bleached and retaining more of the natural components of wood (especially lignin); commonly used in packaging.
- “I believe, Miss Howard, that it was you who found this sheet of brown paper?” He held up the same dusty piece which Poirot and I had examined in the morning-room at Styles.1920, Agatha Christie, The Mysterious Affair at Styles, London: Pan Books, published 1954, page 155: