Gesso is made from ground marble dust. Some acrylic painters besides using it for canvas surface prep will mix it with their acrylic paints. It has a sort of chalky effect and makes the painting a bit out of focus. If you have a canvas that has gesso on it, you will see it labeled either portrait or regular canvas.esso is a thick white pigment designed to cover untreated and unprimed canvas. The gesso has two purposes. The first is to cover the unprimed canvas so that the paint you apply does not bleed through the canvas.
Potassium can be solid, liquid or gas. At normal room temperature and atmospheric pressure it is a solid. Above 63.3oC it is a liquid and above 760oC it is a gas. 32 people found this useful.
The chemical element that bears the symbol K, potassium has an atomic mass of 39.0983 and an atomic number of 19. This alkali metal is soft and has a color of silvery white. It reacts to water and it oxidizes in air. Aside from this, the element can produce enough heat to burn evolved form of hydrogen.