I was told that Yozuri Hybrid Flourocarbon in Smoke Purple will glow under a blacklight. I would not know personally because I called Yozuri corporate office in Florida and they sent me to some place in New York to which I bought 2 rolls. They shipped me "Smoke", I called them back and told them of their mistake, shipped back the 2 rolls and they returned 2 rolls of "Smoke". I call back again and the owner of the place tells me that Smoke and Smoke Purple is the same. It clearly is not, to which I told him in not so many words and after calling the corporate office again and them calling New York, my money was refunded. I do have 2 nice new rolls of Smoke, that I will never use. This was done after calling all the "Local" retailers of Yozuri all over Ky and nobody has the purple. So if you can find it, let me know.
My guess is that you will have a hard time in dyeing some since water won't penetrate it, I don't see how the die will either. Just a thought but if it works, market it up and make a million. I for one would love to see Flourescent Flourocarbon and would buy it in a heartbeat.