Sun-Thickened Walnut Oil

As low as €53.30
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SKU
510-40WST

Sun-Thickened Walnut Oil is made by exposing lightly, refined walnut oil to the sun for 90 days, thickening in the process. Yellows less than linseed oil, so it is good for making pale oil colors and to make oil paint more fluid with flow out and leveling. More info

Rublev Colours Sun-Thickened Walnut Oil is made by exposing filtered, cold-pressed walnut oil to sunlight in shallow tanks covered with clear glass and exposed to the atmosphere for a period of three months. Exposure to sunlight thickens it. This walnut oil is naturally bleached to almost water white, so it can be used with palest colors and whites.

Use

Use to make oil colors and thin oil colors. This oil is excellent for making and thinning whites and pale colors.

Some woodworkers prefer walnut oil as a finish for implements that come in contact with food, such as cutting boards and wooden bowls because of its safety. People who formulate wood finish value walnut oil as an ingredient because of the edibility of both ingredients. The oil typically is combined with beeswax in a mixture of 1:2 oil to beeswax.

Use turpentine, spike oil, or mineral spirits as the solvent for oil painting mediums and for brush and studio clean-up.

Source

Walnut oil is a pale yellow drying oil derived from freshly dried walnuts (Juglans regia) grown in California. Over 99% of walnut oil sold in the United States of America is produced in California. There are also producers in France, Australia, and New Zealand. There are two types of walnut oil commercially available: cold-pressed and refined. Cold-pressed walnut oil is typically more expensive due to the loss of a higher percentage of the oil. Refined walnut oil is expeller pressed and saturated with a solvent to extract the highest percentage of oil available in the nutmeat. The solvents are subsequently eliminated by heating the mixture to around 200 °C (400 °F). Both methods produce food-grade oils. However, cold pressing preserves more of the nutrients and flavor—not important for use in paint.

History

As early as the fifth-century walnut oil was recommended by Aetius for varnishing wax pictures and gilt surfaces. It is recommended for all light pigments in the treatises on the painting by Leonardo da Vinci, Vasari, Borghini, Lornazzo, Armenini, Bisagno, Volpato, and others.

Product Information
Natural Source: English Walnuts Juglans regia
CAS No.: 8024-09-7
Typical Fatty Acid Profile
Linoleic Acid: 59.7%
Linolenic Acid: 13.5%
Oleic Acid: 16.3%
Palmitic Acid: 7.4%
Stearic Acid: 2.6%
Free Fatty Acid (as oleic acid) 0.02%
Total Saturated Acids 10.1%
Total Mono-unsaturated Acids 16.7%
Total Polyunsaturated Acids 73.2%
Typical Properties
Iodine Value: 153.24
Appearance: Clear and brilliant
Odor: Odorless to slight nutty odor
Refractive Index (at 40 °C.): 1.4692
Color (Lovibond): Yellow: 5 Red: 0.5
Specific Gravity (at 15 °C.): 0.924–0.927
Drying Index: 86.6

Health and Safety

There are no known health and safety risks associated with the anticipated use of this oil.

For more information on how to handle artist's materials safely, please read How to Safely Handle Art Materials and Pigments.

Storage

For best results store in a cool, dry place tightly closed.

More Information
SKU510-40WST
BrandRublev Colours
VendorRublev Colours
Processing TimeUsually ships the next business day.

California Proposition 65: This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm.

WARNING! MAY CONTAIN LEAD. HARMFUL IF SWALLOWED. Avoid ingestion and skin contact. Wear protective clothing and gloves to prevent contact with skin. Never use near children or pets. Conforms to ASTM D 4236.

DANGER
CONTAINS LEAD / CONTIENT DU PLOMB
DO NOT APPLY TO SURFACES ACCESSIBLE TO CHILDREN OR PREGNANT WOMEN.
NE PAS APPLIQUER SUR UNE SURFACE ACCESSIBLE AUX ENFANTS OU AUX FEMMES ENCEINTES.
Must be used exclusively as material for the purposes of arts, crafts or hobbies, not for use by children. Utiliser uniquement aux fins suivantes comme matériaux pour les besoins d'art, d'artisanat ou passe-temps, pas pour une utilisation par les enfants.

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Sun-Thickened Walnut Oil
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