CIA Releases Secret Ink Recipe
Who amongst us hasn’t toyed with secret ink at some point during adolescence? The CIA has been holding onto the formulas for their secret ink since 1917 and 1918. They started to release the secret documents in 1976 but decided the information was still too sensitive.
The declassified material is believed to be the last remaining secrets from World War I.
If you cook up any of this I’d love to hear how it works!