Still experimenting with what glows & what doesn't under black light. This is just some fabric. My "studio" is a walk-in closet where I can close the door and get total darkness. It's pretty bizarre when the door is closed & all lights are out except the fluourescent black light - it's mostly black with various shades of bright blue since most white objects look blueish under UV. I noticed this piece of fabric back in a corner - it stood out like a sore thumb in the dark.