Pigments: What are they?

Artist William Hagerman says:  "In simplest of terms, a pigment is a colored material ground into a fine powder, which is then suspended in some type of media that acts as a binder to hold the pigment together and giving the resulting paint its adhesion...In oil paints, linseed oil is generally used as the binder..."

For the artist there are some important factors to consider regarding pigments when selecting them for use.   Read more on this topic at Hagerman Art.