Coating determination

A method performed in a coating testing system for automatically determining the polymerisation of coating material, the method comprising:

• positioning a near infrared spectroscopy, NIR, spectrometer probe adjacent to a wire to acquire NIR spectra, the wire comprising a polymer coating, wherein the spectrometer probe is maintained at a fixed distance from the wire, such that the spectrometer probe does not contact the wire, and a fixed orientation relative to the wire;
• acquiring NIR spectra of the polymer coating using the probe;
• and
• performing chemometric analysis on the acquired NIR spectra in order to measure the polymerisation of the polymer coating,
• wherein the probe is a reflection probe.