Nicholas Lewis of Everett, WA, made a Mendel print using translucent blue PLA and got a neat surprise:

After receiving my PLA from UltiMachine on Monday I put the natural roll on and did some test prints. I was saving the blue translucent until after adjusting the machine a little more. For some reason I thought “I wonder if either of these PLAs glows under black-light?” So I dug out a black-light and tried, nothing from the natural but look what the blue does…

[Via Fabbaloo]