Laser absorbing compounds

摘要

Various laser marking compositions and related methods are described. The laser marking compositions include a molybdenum metal complex, a tungsten metal complex, or combinations thereof. Marks or other indicia formed on a substrate using the compositions and methods exhibit increased contrast and improved substrate bonding.

主权项

1. A marking composition for forming a mark on a substrate upon being irradiated with a laser, the composition comprising:
a vehicle; and a laser absorber comprising a eutectic composition comprising MoO3 and at least one selected from the group consisting of WO3, Li2O, Na2O, K2O, and combinations thereof.