Origami Paper Fluorescent High Quality Instructions Review

I'm completely baffled as to why this paper is called "fluorescent". Whoever came up with this ad - fluorescent means glow in the dark! I was hoping for at least an unusual paper cover, at least in terms of colour, but instead I get perfectly normal plain paper sheets. They're good on their own, like any Tuttle bag, but why is it called fluorescent? If I had known this was a flat out lie I would have bought a different, more interesting paper, maybe double sided or something.