Create photosensitive objects on your 3D printer using this 1.75mm Color Changing PLA Filament from Monoprice! PLA is a good choice for a printing material if you are looking for high accuracy and high resolution. It extrudes at lower temperatures, does not require a heated base, and has a very low shrinkage rate 0.3% . PLA is harder than ABS, but is therefore also a bit more brittle. The negatives of using PLA is that it is vulnerable to degradation from moisture, sunlight, and heat. Additionally, it is more prone to overheating during processing, which can cause dripping and drooping if it gets too hot. This filament is photosensitive. Under normal conditions it is a neutral/whitish color, but when exposed to sunlight it quickly changes to a brilliant pink. It comes on a 0.5kg spool and prints at temperatures between 190 220 C. Reel Dimensions Spool Diameter 200mm 7.87 Spool Width 37mm 1.46 Hub Diameter 53.5mm 2.11 Hub Width 37mm 1.46