Customer brought in a conservation print on cotton paper that has a 'surprise' image of glow-in-the-dark paint. She asked if the enhanced light filtering of conservation glass would keep it from glowing brightly. I have no idea. On one hand, I'm sure many such prints have been conservation framed and show just fine. On the other, I can imagine it stealing some brightness. She's keeping it in a room without natural or flourescent lights, and wants to use whatever keeps the glow bright.