Pigments can be mixed with several different binding or emulsion agents.
Since the pigments themselves have no binding properties, they must be
mixed with a medium. They can be used with water, oil -- such as linseed
or poppy -- or a chemical medium. Pigment names can be a bit
confusing; not only are there poetic names for colors, but the
manufacturer often names the painting pigments themselves as a marketing
tool. Using eggs as a medium is an ancient practice that can be used at
home. It is the easiest to make, does not crack or yellow, and cleans
up with water and soap. No harsh chemicals or thinners are needed. Paint
pigments can be used with other mediums as well.
Thanks and Regards