... stable melting when put near a light source and then turn out the lights, it glows green in dark! It's ... perfect for haunted houses, radioactive bunnies, or ceiling star constellationsCharacteristic 1.Filament ... 3D printer like RepRap, Makerbot, Mendel, Huxley UP! Printers, Thing-o-matic , Ultimaker and so forth in assorted diameters since 2009. Esun ...