Encaustic painting, also known as hot wax painting, involves using heated beeswax to which resins and colored pigments are added. This results in a paste like meduim which is applied to a surface such as prepared wood or canvas.
Experience has taught us that certain combinations of colors, whether in nature or art, affect the eye and mind agreeably, while others give offense. We call the former "harmonies," the latter "discords."
Oil paints are made basically by mixing cold-pressed Linsed oil with pigment or color until a smooth buttery paint is produced. When the oil paint is used and applied to a surface the oil oxidizes or absorbs air and then forms a solid film that binds the pigment to the surface of the painting.