Given the professionalism of Golden/Williamsburg company I certainly have no reason to question their information. They go beyond any other brand to test color fastness and report the results to all who read their newsletter.

I am a trained professional mural artist and have used the best quality paints and supplies available for almost 25 years. Golden/Williamsburg test their paints in many different types of test including outdoors in the Florida sun/weather. I have used Golden’s acrylic products for murals indoors with direct sun and not had an issue with any color. I have used their products outdoors and with the right UV coating and not had an issue. PR122 in my WB oil paints shows no sign of fading in my samples, but then those are indoors where my oils belong. :thumbsup: Wishing you great paintings.

PR122 has been known to “Dull” slightly, but the change in color is minimal and restricted to certain situations (prolonged exposure to light). The change is noticeable by the human eye though, and may make a difference to some artists. To my knowledge, there is no other pigment that is as lightfast or stable in that specific hue range.

Reading through the art pigment database reveals a lot of information, which can then lead you directly to articles and references that detail the findings and who made them. The world will be much worse off if artiscreation.com ever goes away.