I was at. A product information session during which the paint company representative recommended applying linseed oil to the ground, wiping off all the excess until the surface appeared dry, allowing the surface to dry 24 hours as a solution/to avoid sinking in. Is this good practice?
I think, as a paper conservator, that oil applied in a good way to the canvas won’t cause problem with adhesion, but a lot of problems with ageing, especially if the canvas is thin. Correct me if I am wrong ? I observed cracks coming with oil stains on canvasses used for lining (19th c.).
This is one solution that can be used to combat sinking in (although depending on the type of drying oil used you might have to wait a bit longer than 24 hours)….as long as the layer is not applied too thickly then potential problems with adhesion can be avoided. There is additional info on “sinking-in” and “oiling out” in our Varnishes document located in the Resources section if you are interested in looking at alternative suggestions.
In this case the original poster is asking about applying oil directly over the ground (not directly to the canvas). It is not good practice to expose canvas directly to oil media unless it is sized or primed as the acidity of the oil can contribute to (or even accelerate) the degradation of the canvas as it ages.
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