Laser-markable plastics contain non-gloss pigments based on layer silicates with an irregular surface, coated with metal oxide(s), Prussian Blue and/or basic Cu phosphate. Pref. the pigment content is 0.01-4 wt%w.r.t. the plastic system. Pref. pigment is metal oxide-coated mica (esp. potassium mica, i.e. muscovite) or a layer silicate coated with TiO2, pseudobrookite or Prussian Blue. Pref. plastic is polyethylene or polypropylene.
