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

#131950

I was able to find snippets of some french articles that suggest that Zinc sulfide may have been used.

I think RAD stands for Radiana, which was either a company or the trade name of the paint/process. I believe it to be different from the Radiana trademark used in the US for “radium gowns” described here http://query.nytimes.com/mem/archive-free/pdf?res=F30811F83F5D1A7A93C7A9178DD85F468285F9

and here
http://fultonhistory.com/Newspaper%2015/Variety/Variety%201922/Variety%201922%20-%200919.pdf

see also this french article, illustrated with photo postcards that also glow

http://cnum.cnam.fr/CGI/fpage.cgi?4KY28.110/396/100/678/0/0