How to create a Silk effect by adding color layers in egg tempera. Its about using “opposite” color values in painting the sucessive layers on an icon
In the first layers we start with thick color, to create a solid foundation. Then, without covering all of the surface, we continue with thinner and thinner layers created with a mixture of the egg emuslion and some water. Thin layers allow light to penetrate. Thus the different layers interact with each other creating a new color.
The same goes with the colors themselves: The juxtaposition of warm base with cold highlights, creates an impression that resembles silk. In this case, egg tempera -that works magnificently with cold tones (it is true that warm tones of eggtempera is not as rich as oils)- gives the shine and movement of sizzling silk on garments. That is the so-called “Silk effect”
More info on color layers, on this blog? Just try https://angelicon.gr/color-recipes-in-byzantine-iconography/
There are many interesting artices on colors and their use, a very interesting one is : https://www.coloracademy.co.uk/ColorAcademy%202006/palettesandmixing/ancient/europe/greek/front.htm