Most of Michael's paintings were created using tempera on canvas, but he also used tempera on standard watercolor paper and various types of exotic "metallic" paper.

Tempera, also known as egg tempera, is composed of egg yolk, powdered pigment, and distilled water. The egg yolk serves as the binder that holds the pigment together. The addition of water turns the paint into a usable paste-like form. Tempera also refers to the paintings done in this medium. Here are more details about tempera and its history in the world of art.