Explore Natural Spike Lavender Oil for Oil Painting

Spike oil is a natural, low-toxic substitute for turpentine. It can be used as a solvent for oil painting and in egg-oil emulsion tempera recipes. It was used historically in oil painting as early as the fifteenth century. It is believed that spike oil improves the handling of oil-based paints because it promotes oxidation instead of simply evaporating like most solvents. However, this has not been verified by scientific testing. Unlike other solvents, a small amount goes a long way and has a pleasant smell. It evaporates slower than turpentine, mineral spirits (white spirits), and odorless mineral spirits (OMS).

Uses in Art

Spike oil can be used to thin oil paint like other common solvents, such as turpentine. It is also an effective solvent for natural resins, such as dammar, mastic, sandarac, gum elemi, and copal, in conjunction with turpentine.

Charles Eastlake cited the historical use of spike oil in Materials for a History of Oil Painting. These writers referred to the propensity of blue pigments, specifically azurite and smalt, to sink into the paint, causing excessive oil accumulation to the surface. The large particles of these pigments are heavy and sink while the oil paint dries, giving the color a dull and greenish appearance. The addition of spike oil reduced the amount of oil binder and encouraged faster drying to prevent the blue pigment from sinking in, which is the cause of fading and changing to green.

For complete information about spike oil, please read Lavender Spike Oil: Source, History and Use in Painting.

Lavandin Grosso: Source of Our Spike Oil

Most people don’t realize there are a variety of different lavender essential oils. One of the lesser-known materials is Lavandin grosso, a hybrid created from true lavender (Lavendulan augustifolia) and spike lavender (Lavendulan latifolia). True lavender typically grows higher in the mountains, while spike lavender grows in lower elevations. Where the two varieties tend to meet, they eventually cross-pollinate, and Lavandin came into being. In general, it is a larger plant than true lavender and yields a higher production of oil. Lavandin grosso is the source of our spike oil because of its lower cost. It has a stronger scent with a slightly different note and is more economical than the other lavender choices.

Our spike oil is imported from France, where it is extracted from the flowering tops of cultivated Lavandin (Lavandula x. intermedia Grosso) and steam distilled to high purity. The essential oil is completely natural with nothing added.

Toxicity

Both lavender oil and lavandin oil are considered non-toxic and have GRAS status. Considering the high usage of lavender oil in aromatherapy, the reported incidence of skin reactions is low.

A report commissioned by Art Tree LLC a supplier of spike lavender oil determined the following: “Evide “tial data are supportive that Spike Lavender Oil would not cause a chronic health effect with acute or prolonged dermal or inhalation exposure. The potential for idiosyncratic allergenicity may exist and should be forewarned, but this effect would be readily identified and reversible. It is not proposed as a label caution. Adverse effects during pregnancy are unknown but assumed minimal, given the history of product use. It is not proposed as a label caution.” See” the full report.

A word of caution: Spike oil naturally contains several types of substances, such as linalool (CAS No. 78-70-6), linalyl acetate (CAS No. 115-95-7), camphor (CAS No. 21368-68-3), 1,8-cineole (eucalyptol, CAS No. 470-82-6)  and limonene (CAS No. 5989-27-5), that in sufficient amounts can cause acute toxicological reactions. A safety data sheet for Lavandin Grosso is available here. As far as we know, no studies have been performed on the effects of inhaling spike oil, and OSHA has not established permissible levels in the workplace. This means that the effects of inhaling spike oil are unknown, so artists should take precautions and use this product with adequate ventilation and protective gear.

Note: In the opinion of Natural Pigments, users of spike oil should use caution and avoid personal exposure to the vapors by wearing a half-mask respirator with an organic vapor cartridge in a well-ventilated studio.

Chemical Analysis