car·ton·nage 
(kär′tə-näzh)
(kär′tə-näzh)n.
A material consisting of linen or papyrus strips covered with wet plaster, used in ancient Egypt especially for molding mummy cases and funeral masks.
[French : carton, cardboard, carton; see CARTON + -age, -age (from Old French; see -AGE).]