Below you can find the Until the 1950s most motion picture film was made of this highly flammable material sometimes called celluloid Jeopardy Words Answer. The answer to Until the 1950s most motion picture film was made of this highly flammable material sometimes called celluloid has 7 letters. This clue belongs to the The chemical world category and is part of Jeopardy Word Level 1174. If you scroll near the bottom you will find other clues and answers part of level 1174