Cold Pressed Linseed Oil Produced from pressing of flax seeds without using heat or chemicals of any kind. Increases tendency of oil paints to yellow over time when used to thin oil colors. Cold Pressed Linseed Oil Produced from pressing of flax seeds without using heat or chemicals of any kind. Increases tendency of oil paints to yellow over time when used to thin oil colors. Cold Pressed Linseed Oil Produced from pressing of flax seeds without using heat or chemicals of any kind. Increases tendency of oil paints to yellow over time when used to thin oil colors.