Bristol board
material consisting of a high-grade white cardboard, most commonly made by pasting together sheets of heavy ledger paper
en-GB/ˈbɹɪstl ˈbɔːd/
en-US/ˈbɹɪstəl boʊɹd/
material consisting of a high-grade white cardboard, most commonly made by pasting together sheets of heavy ledger paper