Sometimes said to be the ink of the Old Masters, however there seems to be a difference between walnut ink and "iron gall ink" made from oaks instead of walnut. This is not our specialty so we'd refer you to art history specialists here. Walnut Ink is usually made from the Juglans nigra tree and used as an ink. It has poor lightfastness.
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Walnut extract
NBr7
Alternate Names
Black Walnut Extract
Juglone
Black Walnut Dye
Pigment Description
Resources
NBr7 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.comCAMEO Materials Database: Conservation & Art Materials Encyclopedia Online, Museum of Fine Arts Boston. (Accessed June 2025). Black Walnut Dye https://cameo.mfa.org/wiki/Black_walnut_dye. Museum of Fine Arts Boston.
Stats
Lightfastness
Conflicting reports, overall compared to something like an iron oxide pigment we would say Poor. Compared with other botanical inks it may be better than many
Transparency
Transparent
Dry Pigments listing NBr7
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