In the past two decades, 3D printing using polylactic acid (PLA) and other plastics has become widely used for modeling, prototyping, and manufacturing, for both professional and amateur applications. Statistics website <www.statista.com> predicts that the global 3D printing market will grow from $12 billion in 2018 to $20 billion in 2021. Like 2D-printed signs, prints, and photos, 3D-printed objects, if placed outdoors or in windows, will be exposed to visible light and UV radiation that can cause colorant fading, surface chalking, crazing, and other degradation (including a loss of brightness in the case of fluorescing colors). Little recent work has been published concerning testing of 3D-printed materials for light fading, ozone resistance, and the long-term dark storage stability. [1] To develop a protocol for permanence testing of 3D-printed objects, the authors first developed a 3D-printable test target inspired by the widely-used Macbeth ColorChecker. Fade-resistance testing of samples placed in the 3D color test target was conducted under accelerated fluorescent illumination and in outdoor sunlight.