Egg tempera
To make your own paint, crack an egg and separate the yolk from the
whites without piercing the yolk. The best way to do this is to pour the egg
back and forth between two halves of the cracked shell, allowing the whites to
drain out. Once the yolk is separated, put it on a plate or in a bowl and pierce
it. Then mix the yolk with an equal part of water and add to the paint (which
has been premixed with a small amount of water) until the paint reaches the
consistency of melted butter. The exact consistency will vary.
An inkwash over the sketch will secure the light and dark hues into place. To
paint with egg tempera, use small strokes. Remember that you can't cover a large
area with a single stroke since this kind of paint dries very quickly.
Good trick: egg-oil emulsion
Tempera made with a single egg yolk is not as workable as an egg-oil
emulsion. Adding a small amount of stand oil improves the paint's handling
properties and increases resistance to cracking, allowing the paint to be
applied thickly. Egg-oil emulsions can be used on flexible supports such as a
canvas, heavy watercolor paper and thick bristol paper, if applied in thin
layers. Thicker layers, like those used in gouache, are workable when built up
slowly using many thin layers. Egg-oil emulsions produce a glossier finish than
pure egg tempera and dry better. Like egg tempera, an egg-oil emulsion dries
very rapidly and can be painted over almost immediately.
You can prepare your own egg-oil emulsions based on the following
instructions. (Remember to take extreme caution when using dry pigments.) Egg
yolk and linseed oil are combined to create an egg-oil emulsion with an oil
paint consistency. Mix one teaspoon of oil with a single egg yolk. Too much oil
slows down the drying process significantly and tends to leave a tacky surface.
One part of this emulsion can then be mixed with one part of water-dampened
pigments.
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