Method for the detection and removal of frost, ice and snow on aircraft surfaces by application of a glycol-based fluid containing a marker dye

摘要

The presence of a marker dye in an anti-frost or de-frosting fluid enables an immediate detection of the fluid by appropriate illumination. A glycol-based fluid for spreading over aircraft surfaces to de-frost or protect against frost which comprises a marker dye, is claimed. The spectral marker indicates the presence of the fluid by illumination of the surface with radiation of a given wavelength. An Independent claim is also included for the process of application and detection of the glycol fluid.