Effect colorations are mostly based on synergies between conventional absorption pigments and reflective metal flakes or transparent pearl luster pigments. Organic platelet effect pigments, on the other hand, behave like a link between conventional semi-transparent absorption pigments and inorganic interference systems.
Unlike multilayer effect pigments, organic platelets cannot produce multicolor interference effects, but instead two colors, the one observed in remission and the other in transmission. To obtain good results, it is important to ensure that both coloristic phenomena (remission and transmission) are well balanced for an ideal overall color effect. To allow the creation of this ideal interference effect, the crystals must have a specific depth, width and length. Surprisingly, numerous organic pigments are able to generate such effects; the bluish flop usually observed with quinacridone pigments can be considerably extended, and exotic combinations with dioxazine pigments switch color from green to violet.