Soil pigments
These are composed of several types of soils which are elutriated, dried and grinded into a fine powder which can be used as colour pigment. The most common colour is tawny which also becomes ruddy when heated.

Oxide pigment
These intense colours are developed through chemical reactions between different metal oxides and minerals. The colours obtained are deeper than those found in nature, i.e. blue or violet.

Plant pigments
Those colours are obtained through a boil of mixed greens such as moss, roots and leaves which when treated with salt turn into to a powder. This pigments give a shinny effect.

Synthetic pigments
These are pure but intense signal colours which are made out of coaltar. The colours obtained are generally red.