Linseed oil - Earth.com

In fact, the ferrous oxide could be gotten from the soil. Then the farmers would blend it with lime and skimmed milk. They’d also use linseed oil, which they could make from vegetation, and that mixture left the wood coral in color. Very fetching! They soon found that coating them with these materials made the barns less in winter. Photo Credit: PxFuel

News coming your way
The biggest news about our planet delivered to you each day