| abstract |
The invention relates to the use of spherical metal particles which are free from antimony and/or from antimony-containing compounds, as laser-marking or laser-weldability agents in a plastic, where the D<SUB>99</SUB> value of the particle size distribution of the spherical metal particles in the voluminal median of the cumulative particle size distribution determined by means of laser granulometry is < 110 µM, AND THE D<SUB>90</SUB> value is < 75 µM AND THE D<SUB>50</SUB> value is < 45 µm. The invention further relates to a laser-markable and/or laser-weldable plastic which comprises a laser-marking agent composed of spherical metal particles which are free of antimony and/or from antimony-containing compounds, where the D<SUB>99</SUB> value of the particle size distribution of the spherical metal particles in the voluminal median of the cumulative particle size distribution determined by means of laser granulometry is < 110 µM, AND THE D<SUB>90</SUB> value is < 75 µM AND THE D<SUB>50</SUB> value is < 45 µm. |