Sun-Thickened Linseed Oil

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Usually ships the next business day.

Rublev Colours Sun-Thickened Linseed Oil is made by exposing raw, cold-pressed linseed oil to sunlight in shallow tanks covered with clear glass and exposed to the atmosphere for one year. Exposure to sunlight lightens the oil considerably but only slightly thickens it. To give the oil more body (higher viscosity), we blow air through the oil for at least one year.

This linseed oil is slightly more yellow than sun-thickened walnut oil, so it can be used with pale colors and white. This oil can be used as a medium or added to homemade mediums.

Use turpentine, spike oil, or mineral spirits as a solvent or diluent for oil painting mediums made with linseed oil. Linseed oil is a yellowish drying oil derived from the dried ripe seeds of the flax plant (Linum usitatissimum, Linaceae).

Natural Source: Linseed
Linum usitatissimum
Acid Value (mg KOH/g), max: 2
Color (Gardner 1953), max.: 4
Iodine Value: 145–160
Viscosity (Centipoise @ 25° C): 10,000
Viscosity (Gardner-Holdt @ 25° C): Z
Saponification Value: 162–172
Appearance (@ 25° C): Clear/Transparent
Specific gravity (@ 25° C): 0.960
Weight Per Gallon: 7.81 lbs.
Health and Safety

There is no known chronic toxicity associated with the intended use of this product.

Shipping from
This product is shipped from our supplier's warehouse in Willits, CA, United States
Our guarantee
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
A 25% handling charge is levied against all authorized returns except those due to our error. Unauthorized returns are subject to a 40% handling charge. Damages & defects must be reported to us within 14 days.
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