Special measurement techniques, sample preparation, and attention to detail are prerequisites for the measurement of highgloss, deep-black coatings. Many believe that the device they use to measure colourful surfaces on a daily basis can also be applied for black measurements without any issues. However, as reflection values approach zero, as is the case for deep-black surfaces, certain technical aspects mean the colorimetric evaluation cannot be carried out reliably and reproducibly. As many are not aware of this, measurement results are often obtained which suggest excessive blackness values or overly blue undertones. In our last publication on colour measurements ...