Gilsonite
/ˈɡɪlsənʌɪt
/noun [mass noun] trademark
A very pure, shiny, brittle black form of asphalt, used in making inks, paints, and varnishes.In the 1990s the state led the nation in beryllium and Gilsonite production....
- A general guideline is that 3% binder replacement with Gilsonite will double the viscosity of a binder.
Origin
Late 19th century: named after Samuel H. Gilson, 19th-century American mineralogist, + -ite1.