Patent ID: 8568526

Claim:
Glass flakes, which have been subjected to leaching-out in water, an acid or a caustic lye, which after the leaching-out, have a composition comprising 50-70% by weight of SiO 2 30-50% by weight of TiO 2 0-3% by weight of Na 2 O, where the total amount is ≦100% by weight, based on the glass flake, and which before the leaching out, had a composition that comprised at least one crystalline phase, wherein the glass flakes have one of the following oxide coatings: glass flake+TiO 2 glass flake+TiO 2 /Fe 2 O 3 glass flake+Fe 2 O 3 glass flake+TiO 2 +Fe 2 O 3 glass flake+TiO 2 +Fe 3 O 4 glass flake+TiO 2 +SiO 2 +TiO 2 glass flake+Fe 2 O 3 +SiO 2 +TiO 2 glass flake+TiO 2 /Fe 2 O 3 +SiO 2 +TiO 2 glass flake+TiO 2 +SiO 2 +TiO 2 /Fe 2 O 3 glass flake+TiO 2 +SiO 2 glass flake+TiO 2 +SiO 2 /Al 2 O 3 glass flake+TiO 2 +Al 2 O 3 glass flake+SnO 2 glass flake+SiO 2 glass flake+SiO 2 +TiO 2 glass flake+SiO 2 +TiO 2 /Fe 2 O 3 glass flake+SiO 2 +Fe 2 O 3 glass flake+SiO 2 +TiO 2 +Fe 2 O 3 glass flake+SiO 2 +TiO 2 +Fe 3 O 4 glass flake+SiO 2 +TiO 2 +SiO 2 +TiO 2 glass flake+SiO 2 +Fe 2 O 3 +SiO 2 +TiO 2 glass flake+SiO 2 +TiO 2 /Fe 2 O 3 +SiO 2 +TiO 2 glass flake+SiO 2 +TiO 2 +SiO 2 +TiO 2 /Fe 2 O 3 glass flake+SiO 2 +TiO 2 +SiO 2 glass flake+SiO 2 +TiO 2 +SiO 2 /Al 2 O 3 or glass flake+SiO 2 +TiO 2 +Al 2 O 3 .