The eye is quite a fantastic instrument for perceiving shine and colour tones. In interaction with the brain, humans can distinguish about 20 million colour tones. The surfaces irradiated by light reflect a part of the electromagnetic rays and thus create a colour impression. Of course, this is also dependent on the light source and the viewing angle. The same applies to the gloss impression. Here, too, the incidence of light and the viewing angle play a major role. The definition of gloss perception is: "Gloss is a brightness-contrast phenomenon that occurs when the same visual field location has a ...