Lightfastness is an objective quality feature that does not just depend on the pigment alone, but is determined by the overall recipe. That's why at Schmincke they don't lightfastness information taken over from the pigment suppliers, but rather the overall recipe of each individual shade as original spread in extensive tests, eg on the company roof and/or by a lightfastness test using xenon lamps. This intensive tests to determine the lightfastness of the HORADAM Watercolor contains 24 highly concentrated watercolors (mostly 4 and 5 star lightfastness). High quality artist pigments and an optimal combination of binding agents (natural gum arabic) guarantee brilliant mixing results and good ease of painting, even on softer watercolor paper. The paint boxes are filled with half and whole p.