thickened linseed oil is a created by exposing the oil to the sun to create a thick, syrupy, somewhat bleached oil, with similar brushing qualities to stand oil.
- Pour some oil (about an inch) into a wide dish, cover it with a propped-up lid (i.e. to minimise debris getting in, but so that the air can flow through).
- Stir every day or so to prevent a skin from forming on the top.
- How long it takes for the oil to thicken will depend on how hot the climate is where you live.
- Test the thickness of the oil when it's cool, not when it's still hot from the day's sun.
- Pour it through a sieve or cloth to remove debris before you bottle the oil.
- Flammable; Ground only