Difference between revisions of "Walnut oil"
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== Description == | == Description == | ||
| − | A natural, colorless drying oil pressed from the nuts of a [ | + | A natural, colorless drying oil pressed from the nuts of a [[walnut|walnut]] tree, ''Juglans regia''. Walnuts contain approximately 65% oil. The cold-pressed oil is pale yellow while the hot-pressed oil has a green tinge. Walnut oil dries slower and yellows less than [[linseed%20oil|linseed oil]], but it dries faster than [[poppy%20seed%20oil|poppy seed oil]]. It was popular as a paint medium in Italy, the Netherlands, and Germany. Walnut oil will turn rancid and develop a strong odor on storage. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 12:11, 10 May 2016
Description
A natural, colorless drying oil pressed from the nuts of a Walnut tree, Juglans regia. Walnuts contain approximately 65% oil. The cold-pressed oil is pale yellow while the hot-pressed oil has a green tinge. Walnut oil dries slower and yellows less than Linseed oil, but it dries faster than Poppy seed oil. It was popular as a paint medium in Italy, the Netherlands, and Germany. Walnut oil will turn rancid and develop a strong odor on storage.
Synonyms and Related Terms
nut oil; aceite de nueces (Esp.); huile de noix (Fr.); olio di noce (It)
Other Properties
Liquid is soluble in ethanol, ether, chloroform, turpentine, carbon disulfide. Saponification number = 188-197; Iodine number = 140-150 ; Acid value = 2.5
| Density | 0.919-0.927 |
|---|---|
| Refractive Index | 1.477-1.480 |
Hazards and Safety
Turns rancid and develops a strong odor on storage.
Sources Checked for Data in Record
- Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
- Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980
- Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000