The surface appearance of any colour in an artist quality line is determined by the characteristics of each individual pigment. In general, inorganic pigments will have a more matte appearance than organic pigments, this is due to the particle size and opacity of the particle. Large, coarse pigment particles scatter the visible light, making he colour appear more matte. Synthetic organic pigments with a very fine particle size, such as Phthalos and Quinacridones, appear very glossy, while more coarsely ground pigments, such as umber and ultramarine blue, have a much more matte finish.