eSun PLA 3D Printer Filament, 3 mm Diameter, 0.5 kg Spool, UV Color Changing, Natural to Red This special PLA rapidly changes color from off-white to bright red/pink when exposed to UV light (like sunlight)! The color fades when out of the light Hot-end print temperature 180-210C Minimal shrinkage and warp when compared to ABS Sticks well to PEI print beds when heated to 60-degrees-celcius Its low glass-transition temperature makes PLA a poor choice for high temperature applications