carbon print
photographic print made by the carbon process, which uses carbon pigment and gelatin to transfer images to a paper support
en-US/ˈkɑɹbən ˈpɹɪnt/
en-GB/ˈkɑːbən ˈpɹɪnt/
photographic print made by the carbon process, which uses carbon pigment and gelatin to transfer images to a paper support