I was at my favorite store (which has Halloween stuff all year round

) and I was looking through the costumes to get ideas for this year. I decided to turn this little room where I give the candy out into a mad scientist scene. So, I found a lab coat. It was actually a doctor one and it had a label on it which i want to remove (it was a fabric attached to the shirt, I was also wondering if it's possible to remove this?)
Anyways, I looked at the tag and I believe it said 100% polyester. Will that glow under blacklight? And if not, I heard something about RIT dye making things glow? Do I just follow the instructions on the RIT dye and it will end up glowing?
Thanks a lot