|Why I Mix Oil Paint with Egg Yolk
Egg tempera holds especially well on thin grounds. It has a flexible soft stroke and a matte finish. When oil paints are mixed with egg, they lose their oiliness.
I often use the whole egg for my emulsion (freshness is a deciding factor for the quality and holding ability of the emulsion). I press the whole egg through a fine sieve and add rectified linseed oil and some clove oil to it. I let this mixture sit for a few weeks in a dark bottle. Before painting with it, I put equal parts of the egg emulsion and water in another bottle and shake it well - the painting medium is finished. The egg emulsion dries to an elastic skin that is not water soluble and is generally very resistant, much hardier than oil paints alone.
Because I paint a lot on paper and on loose canvass, these particular characteristics of the egg emulsion are very important to me. In addition, I thin out the paint to an watercolour consistency and apply it lightly. When it's dry, I wipe it with a soft cloth and then the colours begin to shine from the inside out!