Originally Posted by Judy Manuche
Alex, what is the permanance of this medium...how many years does the color last? Does it crack? It looks very smooth, does it stay that way? Do the colors fade or yellow over time?
Hi Judy. Egg tempera is very permanent once it cures (6-12 months if I am not mistaken.) It can crack only if you paint it on a flexible substrate. It is recommended that paintings be executed on a solid inflexible surface. On larger works it is recommended that the board be braced on the back or gessoed with equal layers on the front and back.
I have not experienced any yellowing or fading of the colors. In fact I have read that egg tempera retains it's beautiful color for ages since the yellowing on paintings occurs because of oils or some other items in the paint other than the pigment. In the case of traditional or pure egg tempera where only the yolk of the egg is mixed with the pigment there are no oils present to cause any yellowing. In the case of an egg-oil emulsion where egg yolk is mixed with slow drying oils (ex. linseed oil or stand oil) it is my understanding that some yellowing can occur.