Conversely, boiled linseed oil is not boiled in the culinary sense. It is important to note that even with food-grade oil, the curing process is critical.
Is Polymerized Linseed Oil Truly Food Safe?
While this makes it a superior choice for finishing furniture quickly, the added chemicals render it unsafe for surfaces that contact food. True food-grade linseed oil is refined to remove impurities and is free from the metallic driers found in boiled versions.
This curing phase is when the oil hardens through oxidation. The surface should be cleaned of all dust and debris before the first coat is applied.
Is Polymerized Linseed Oil Truly Food Safe?
The resulting polymerized layer is hard and water-resistant, creating a protective barrier that is chemically bonded to the wood. Beeswax and carnauba wax are also popular, typically used in combination with oils to create a harder, more water-resistant surface.
More About Is linseed oil food safe
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