| abstract |
Described are coating compositions for marking substrates comprising a) a solvent, b) a salt of a phosphorus or boron containing acid and an amine or imine, c) a salt of a non-phosphorus and non-boron containing acid and an amine or imine, d) a binder, and e) optionally additional ingredients, their manufacture and use, wherein the above-mentioned salts can also be present in an encapsulated form as a kind of pseudo-pigment. Substrates coated by the above compositions can be marked by laser irradiation. |