Paint Fit for Masters™... These mediums are formulated and produced with the same high-quality standards found in Da Vinci Paint Colors. Alkyd Gel Quick Drying Medium - Mix 1:1 with oil colors to accelerate drying time and increase color transparency. Will maintain a soft and creamy consistency. Copal Painting Medium Substitute - Formulated to dilute oil paints in glazing applications or for thin applications. Will dry faster than linseed but slower than alkyd resins. This is made up of alkyd resin, linseed oil and odorless thinner. Linseed Oil - Pure and refined for diluting oil colors without the use of harsh, toxic solvents. Can also be used to clean brushes when changing colors. Liquid Alkyd Quick Drying Medium - Mix 1:1 with oil colors to accelerate drying time and reduce viscosity. Safflower Oil - Pure and refined for diluting light colored oil paints. Using safflowe