objectLinseed oilColors & materialsFlax-seed drying oil of European painting. Not walnut-oil, and not resin varnish.Also known as Linseed OilLinseed oil is used in Medicine.Pliny’s Natural History treats linseed and its oil among flax preparations entering remedies and related applications. A Roman-era pharmacological use of flax oil, not olive oil already walked and not later painter’s medium alone.from Pliny the Elder · Natural History, c. 77 CEused in · sourced · documentedsourcesNatural History · Pliny the ElderPliny, Naturalis Historia.