Safety marker for securing valuable objects

摘要

The core-shell-particle (20) has an adhesive for the security printing, and a core (22) that has an infra red absorber, where a shell (24) that surrounds the core. The shell of the core-shell-particle has a sublimation, where the sublimation has burnt or luminescence material with a sublimation temperature of less than 220 degree Celsius. The sublimation material is made of polymerization or polycondensation process. Independent claims are included for the following: (1) a method for producing core-shell-particle; (2) a laser-marking security element for security of valuable object; (3) a method for producing laser-marking security element; and (4) a safety paper for the production of safety and valuable documents.