Garandy Posted June 27, 2020 Share #1 Posted June 27, 2020 Chemical treated for secret messages? By Germans? Link to comment Share on other sites More sharing options...
KASTAUFFER Posted July 28, 2020 Share #2 Posted July 28, 2020 Both the US and the Germans used chemicals to look for invisible inks. kurt Link to comment Share on other sites More sharing options...
Garandy Posted July 28, 2020 Author Share #3 Posted July 28, 2020 Thanks much Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now