It is a substance (pure pigment) or preparation (compound pigment) in the form of practically insoluble fine particles, unlike the dyes which are in liquid solution (dye for ink, for paint, for dyeing...) Mineral pigments, organic pigments and metallic pigments can be found.

We classify them on our website in two categories: natural or synthetic. Natural pigments (for example our ochre, earth, etc.), are found in the natural state and undergo only a process of calcination and/or mixtures.
Synthetic pigments, on the other hand, are produced by thermal and/or chemical reaction between several materials. We speak here of «green chemistry». Their shades are less term than those of natural mineral pigments which, in turn, have a much better resistance to UV over time. Unfortunately, we often read or hear the words “blue ochre”, “pink ochre”… These products do not exist, it is a shortcut that some uninitiated people take to talk about synthetic pigments. Moreover, not all natural pigments are ochre ! Just as there are synthetic pigments of a color similar to ochre and which are not! Ochre is not a colour but a material itself (kaolin + hydroxide/iron oxide) which has its own characteristics, such as its inalterability.