Protect Your Love Life! Valentine’s Secret Ink

External News Details

Kristie Macrakis, a professor in the School of History, Technology, and Society, has been featured as a guest blogger on Yale University Press, uncovering the history and use of secret writing forms. In celebration of Valentine's Day, the special guest post exposed a multitidue of methods used through history for love letters and other discrete communication, including the use of substances such as milk, lemon juice, and cobalt chloride.

Additional Information


Ivan Allen College of Liberal Arts, School of History and Sociology

Student and Faculty
invisible ink
  • Created By: Beth Godfrey
  • Workflow Status: Published
  • Created On: Feb 26, 2014 - 11:14am
  • Last Updated: Oct 7, 2016 - 10:26pm