Military Break Letters Novels & Stories

“If I'm correct, which I think I am, it's a type of ink that is rarely known but mostly used in the military. When they send messages to one another during war time most of these letters hold very secretive information and they know these letters can be hijacked. But luckily for them another property owned.by this ink is, it's time effective. If it's written and closed up if opened before the designated time that it uses.to settled into the paper the writings would fade as it is being read which is why they keep the most important informations by the base of the letter which means the letter fades from bottom to top, but once it's opened at the right time it fades within a few hours or two!”