Linseed Oil vs Boiled Linseed Oil: Key Differences

Linseed oil, derived from the seeds of the linseed or flax plant, is well-known as a natural wood finishing oil. Both raw and boiled linseed oil are commonly used, but they have distinct properties and uses.

Types of Linseed Oil

The two primary types of linseed oil used for wood finishing are raw linseed oil and boiled linseed oil. Here's a closer look at each:

• Raw Linseed Oil: The purest form of linseed oil, extracted without any additives or chemicals. It is ideal for oil-based paints and provides a smooth finish. However, its slow drying time, which can take anywhere from 2-10 weeks, may not be suitable for all projects. For a detailed overview, you can refer to the Linseed oil - Wikipedia.
• Boiled Linseed Oil (BLO): Despite the name, it is not literally boiled. Instead, it is treated with heat and additives to accelerate the drying process, typically taking about 24 hours to dry. This makes it more practical for general use on wooden surfaces.

Applications and Benefits

Both types of linseed oil are used for various applications and offer unique benefits:

• Linseed oil is included in paints, varnishes, and stains due to its protective properties.
• It nourishes and protects wood, enhancing its natural grain and providing a hard-wearing, lustrous finish. For more insights on various types of wood finishes, check this overview of the major types and their benefits.
• Regular re-oiling with boiled linseed oil is recommended for ongoing protection, generally once a year or more frequently in high-usage areas.

Health and Safety Considerations

When selecting linseed oil for a project, it's important to consider health and safety factors:

• Boiled linseed oil can contain chemical additives that emit volatile organic compounds (VOCs) and pose potential health risks. Users should check product labels and review the Material Safety Data Sheet (MSDS).

Restoration of Older Wood

Restoring older wooden items with linseed oil involves the following steps:

• Remove previous oils, waxes, or finishes to ensure effective adhesion and finish of the new coat. A detailed guide on oiling wood furniture may come in handy.
• Sand rough surfaces smooth and clean them thoroughly using a wood cleaner or solvents to strip old coatings. For a natural look, refer to these tips on creating a distinctive look for your home.

Comparison Table: Raw vs. Boiled Linseed Oil

In conclusion, both raw and boiled linseed oil have valuable properties for wood finishing. The choice between them depends on the specific requirements of the project, such as drying time and potential health concerns.