It was very popular in the 18th and 19th centuries.
Manufacturer / product code: Zecchi / 0098
Chemical description: high-molecular hydrocarbons
Color Index: NBk6
More info: C. Bothe “Asphalt” In: B. Berrie, Artists’ Pigments: A Handbook of Their History and Characteristics Volume 4, National Gallery of Art, Washington, 2007.
DOWNLOAD paper: “FORS spectral database of historical pigments in different binders”