Nouvelle huile pour couleurs à huile, dite „Frankfurter Oel“
The oil or compound is composed of linseed oil, dammar, cats-eye or other suitable gum, wax, or stearine, and oil of terpentine: the ingredients are boiled together and then rubbed up with the desired colours. Wax may be omitted and the linseed oil replaced by other drying-oils.
 FR patent No 128,022, GB patent No 501/1879
 DE Reichspatent No 2,516
 LU patent No 30