The class of effect pigments (luster pigments) comprises the two main groups of special effect pigments including pearl luster pigments (pearlescent pigments, nacreous pigments, interference pigments) and metal effect pigments. All these pigments consist of small thin platelets that show strong lustrous effects when oriented in parallel alignment in application systems (e. g. in paints, plastics, printing inks, cosmetic formulations). Special effect pigments are described in Section 5.3.1, metal effect pigments in Section 5.3.2).
5.3.1