GO-3D UV Sunlight Color Change PLA 3D Print Filament Mini Value Pack 1.75mm 2X 225g Recommended Extrusion Temperatures: 190C-220C The color change occurs immediately, normal PLA printing setting 1 pack UV Sunlight Color Changing White to Purple - 225g 1 Pack UV Sunlight Color Changing White to Blue - 225g Designed by GO-3D Print in California