carbonpaper
nounUK /ˈkɑːbən ˌpeɪpə/
US /ˈkɑːrbən ˌpeɪpər/
Carbon paper is a thin dark sheet you put under paper so your writing copies onto the page below.
She slipped a sheet of carbon paper between the two forms so the typing would show up on both.
RELATED WORDS
OTHER MEANINGS
2. A carbon copy made with such paper.
He kept a carbonpaper copy of the letter in his file.
3. Paper coated with a dark waxy layer used for making copies.
The old office still had boxes of carbonpaper in the drawer.
4. A thin tissue used in art for transferring a drawing.
The artist used carbonpaper to trace the sketch onto the canvas.