thin card covered with a layer of white china clay and a black top layer of Indian ink, which can be scraped away with a special tool to leave a white line
2.
a picture or design produced in this way
scraperboard in American English
(ˈskreipərˌbɔrd, -ˌbourd)
noun
scratchboard
Word origin
[1890–95; scraper + board]This word is first recorded in the period 1890–95. Other words that entered Englishat around the same time include: cholesterol, historicism, masochism, neoclassicism, pogey