Method for marking Liquids using at least two different Marker substances that absorb in the Spectral range from 600 to 1200 nm.

摘要

Method for marking Liquids through the addition of at least two Marker substances in LiquidsWhere the Marker substances are absorbed in the Spectral region of 600 to 1200 nm, and emit Fluorescent Radiation.And the absorption area of at least a Marker substance overlaps with the absorption area of at least another Marker substance.