Lightfastness

Lightfastness refers to the ability of colours, particularly in plastics and coatings, to preserve their colour integrity over longer periods of time, even under the influence of natural sunlight. It is the resistance to fading or changing of colour caused by ultraviolet radiation and other light sources.

This property is of decisive importance, as it ensures that the colours of materials retain their original brilliance and attractiveness, even when they are exposed to various lighting conditions over longer periods of time. Various factors play a role here, such as the composition of the dyes and pigments as well as the structure of the material itself, all of which contribute to ensuring lightfastness.