Light stability
Some pigments can change their colour at UV-light exposure. For this reason we recommend to use for areas exposed to UV-light, e. g. sunlight, only natural shades or shades with light stability. Such colour shades we have marked with .

Epoxy- or polyurethane-coated?
Epoxy-resins turn under UV-light exposure yellow and incline to chalking. For areas with strong illuminating of sunlight like shop-windows, terrace-windows etc. we recommend light stable colour shades of our COLORQUARTZ coated with polyurethane.