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Working with High Viscosity Mediums
High Viscosity creates enamel-like surface.
A high viscosity medium has high sheen and high cohesive force that levels its surface. Adding
high viscosity medium makes a mixture thicker with a definite sticky feeling. Sun-thickened
linseed oil was the polymerized oil before the 19th century.
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HIGH COHESION / SLOW DRY
In the style of Van Eyck, painters use
high viscosity mediums (50% Oil to 50% Solvent) to create thin, illusionary surfaces with no brush
marks. Linseed Stand Oil, the polymerized oil of the 19th century, mixed with solvent makes a
similar high viscosity painting medium that is also slow drying.
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Mix all painting mediums, especially those that contain only oil and solvent, thoroughly by
shaking before using.
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HIGH COHESION / FAST DRY
Galkyd is made from alkyd resin, the polymerized oil of the 20th century.
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Alkyd resin painting mediums add binder (increase adhesion) and speed up drying.
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No more solvent than 50% by volume can be added to Galkyd without compromising its binder.
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HIGH COHESION / MODERATE DRY
Adding Stand Oil 10% to Galkyd slows Galkyd's drying time and gives it a more slippery feeling.
Caution: Adding more Linseed Oil may cause the paint film to wrinkle (alligator) and increase the
tendency of oil paints to yellow over time.
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