I was removing the peel ply and infusion mesh on a part today only to notice this happening. WTH?!?!

seen it once before and nobody believed me probably static electricity caused by friction between the peelply and carbonfiber like you have with a sweater sometimes

Matthieu Libeert
Founder MAT2 Composites X Sports
website: www.mat2composites.com

Thing it never happened before. And it's a resin I've used before. At first I thought I was seeing things because the room was a little dim. But then on the second pull I was like WOAH!!!

I have noticed this on my breathe-right nasal strips when i remove the adhesive backing and also with some resins too. I would guess it's most likely due to the resin being delaminated, most likely the result of energy release and electrons jumping to lower energy levels likely to do with the breakage of chemical bonds (based on my rusty chemistry background some long time back, this is common for organic/polymeric compounds)

It happens all the time, if you get the chance trya nd get to a boat builders when they are removing the hull from the mould... propper thunder and lightning indoors!