Linseed stand oil, also simply known as stand oil, is a specific type of linseed oil that has undergone a special heating and processing technique to produce a thickened, viscous liquid. Unlike raw linseed oil, which is obtained by cold pressing the seeds of the flax plant, stand oil is processed further through a process called "heat-bodied" or "stand heating."

During stand heating, linseed oil is heated at elevated temperatures (usually around 300-320°C) in the absence of oxygen for an extended period, often several days to a week or more. This controlled heating process causes the oil to polymerize and thicken, resulting in a highly viscous liquid with a honey-like consistency.

Linseed stand oil is highly refined and has excellent drying properties. It dries slowly and evenly, forming a durable, glossy film when used as a painting medium or wood finish. Stand oil is known for its clarity and resistance to yellowing over time, making it a preferred choice for artists and craftsmen who require a stable, long-lasting finish.

In artistic applications, linseed stand oil is commonly used as a medium or binder in oil painting to modify the consistency of paint, improve brushwork, and enhance the flow and leveling of colors. It can also be mixed with other mediums or solvents to create customized painting formulas tailored to specific techniques and preferences.

In woodworking, linseed stand oil can be used as a high-quality wood finish to provide a protective coating that enhances the natural beauty of wood while offering resistance to moisture, scratches, and wear. It penetrates deeply into the wood fibers, bringing out the grain and creating a rich, lustrous finish.

Overall, linseed stand oil is valued for its versatility, durability, and exceptional drying properties, making it a popular choice among artists, craftsmen, and woodworkers alike.