Reply To: c.1915 "Glow-in-the-Dark" Postcard-Hazard?


Thanks for the advice, everyone! I did contact Monona Rossol per your suggestion, Elizabeth, and she advised that the paint/ink used on the postcard is most likely not hazardous. Because the phrase “expose the picture to light” is found on the reverse, this suggests that it is a phosphor-based material rather than radium. Radium would glow on its own without exposure to light.

I’m still trying to figure out the company that may have printed the card – thanks also for your leads, Abigail!