First, verify the product label; some manufacturers produce specific "Food Safe" variants with alternative drying agents. Recommendations for Food Contact Applications If you are considering using boiled linseed oil for a project that will touch food, there are best practices to follow.
Boiled Linseed Oil Wet Finish Risks and Food Safety Concerns
Boiled linseed oil, despite its name, is not boiled in the culinary sense. The uncured oil and the drying agents can be irritants.
Applying boiled linseed oil to a surface intended for food preparation and then using it immediately would be inadvisable. At this stage, the chemical additives that were used to speed up drying are largely inert.
Boiled Linseed Oil Wet Finish Risks and Food Safety Concerns
Once the linseed oil has dried completely through oxidation, the resulting polymerized film is essentially a solid plastic-like resin. One specific question that frequently arises is whether boiled linseed oil is food safe, and the answer requires a nuanced look at its composition and curing process.
More About Is boiled linseed oil food safe
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