Stand oil is is heat treated and polymerized (thickened) oil. This heat-bodied oil is made from well-refined linseed oil from American flax seeds that is cooked in vacuum-kettles. Vacuum-bodied oils have a lower acid value, better color and yellows less than bodied oils obtained by conventional open-kettle cooking and unbodied oils.
This vacuum-bodied linseed oil has a low acid value, extra high viscosity and exceptionally pale color. It is a stand oil that gives gloss, brushabilty and non-yellowing characteristics when compared to other stand or bodied oils. Bodied oils form harder films than raw or refined linseed oil.
The term "stand oil" is derived from the Dutch word that designated a drying oil heat treated and aged by standing in tanks. Later it applied to oils that were bodied by heat treating for prolonged periods in open kettles. Stand oil, invented in the 19th century, replaced Venice turpentine and sun-thickened linseed oil in artists' painting mediums. Stand oil leaves an enamel-like finish to paint. Bodied oils form harder films and yellow less than refined or raw linseed oils. The use of the term "stand oil" is antiquated since bodied oils today are processed differently than those in the 19th century.
Adding large amounts of bodied oil may increase the tendency of oil paint to wrinkle (alligator). Adding as little as 10% by volume of bodied oil to painting mediums increases the viscosity of the medium and slows down the drying time.
Use turpentine, spike oil or mineral spirits as the solvent for bodied oils and for brush and studio clean up.
|Natural Source: ||Linseed |
|Acid Value (mg KOH/g): ||2.2 |
|Color (Gardner): ||4 |
|Iodine Value: ||- |
|Viscosity (Stokes @ 25� C): ||208 |
|Appearance: ||Clear/Transparent at 25� C |
|Specific gravity: ||0.960 @ 25� C |
|Weight Per Gallon: ||8.03 lbs. |
Rags or paper towels contaminated with vegetable drying oils, particularly those containing iron oxide pigments are susceptible to spontaneous combustion. To prevent unexpected fires, used rags or paper towels contaminated with oil-based materials should be collected in a closeable, air-tight container. Store water-dampened rags or paper towels in a metal container with an air-tight top. Alternately, washing contaminated rags will remove contaminating materials and eliminate risk.