The History of Invisible Ink

As a kid I had a minor obsession with invisible ink after learning about it in a science club. An impressive stack of vinegar and lemon scented papers filled my desk, but the history of invisible ink is much more interesting than a summer enrichment program. Starting with the Roman general Pliny the Elder using milk from the thithymallus plant, to modern inks which are only visible under UV light, the science of invisible ink has grown quite complex. Some of the oldest CIA documents contain recipes for special inks, and MI6 and their very own "adult" mixture during WW1.

Read more of this story at Slashdot.


...

More on Sciencestage.com

    More on Wikipedia

      Related Videos

      • History in the making! After The Shot and Shooting Bigfoot Clips released
        History in the making! After The Shot and Shooting Bigfoot Clips released History in the making! After The Shot and Shooting Bigfoot Clips released. From: Rick Dyer Views: 876 27 ratings Time: 42:24 More in Entertainment
      • American History In Reds And Blues
        American History In Reds And Blues There is a reason it is rare to see references of White People, and Indians being lynched, though it is a fact that these events did occur very often. It is for the same reason that fighting... From: myklmusic Views: 3 0 ratings Time: 02:58 More in Education
      • Worst Ebola outbreak in history in West Africa. - Lonewolf Sager
        Worst Ebola outbreak in history in West Africa. - Lonewolf Sager The worst ebola outbreak in history spreads out of control in West Africa. - LoneWolf & The Three Muskadoggies "Please.... Remember Our Homeless, Hospitalized & Disabled Veterans & Fallen Heroes!... From: LoneWolf Sager Views: 4 0 ratings Time: 02:31 More in News & Politics
      • TOP 10 Tallest Cricketers in the History
        TOP 10 Tallest Cricketers in the History TOP 10 Tallest Cricketers in the History In history of cricket there are some “Big men”. In this video we will discover TOP 10 Tallest Cricketers in the History. 1 –Mohammed Irfan ... From: Cricket Bits Views: 0 0 ratings Time: 03:01 More in Sports
      • History in the First Person: Building the Mercury Capsule
        History in the First Person: Building the Mercury Capsule HEC-TV's “History in the First Person: Is an instructional/educational series that brings history alive taught by those who witnessed history, lived history and/or made history. For this... From: Jacqui Poor Views: 0 0 ratings Time: 59:33 More in Entertainment
      • Epic Rap Battles of History in Paradiso, Amsterdam
        Epic Rap Battles of History in Paradiso, Amsterdam Someone from the audience takes on Nice Peter in an Epic Rap Battle between Albert Einstein and Stephen Hawking in Paradiso, Amsterdam. From: Melvin Captein Views: 2 1 ratings Time: 02:12 More in People & Blogs
      • Greek History In Canada
        Greek History In Canada The types of different emotions I went through watching this documenatry was unbelievable! From feeling proud and happy of our rich background and hard work which defines us as 2nd and 3rd... From: Harry P Views: 2 0 ratings Time: 44:45 More in Autos & Vehicles
      • LDS History in Former Yugoslavia: Krešimir Ćosić, Serbian Book of Mormon, etc.
        LDS History in Former Yugoslavia: Krešimir Ćosić, Serbian Book of Mormon, etc. http://preparetoserve.com LDS Church History in Former Yugoslavia (Slovenia, Croatia, Serbia, etc.) Interesting history about the Serbian Book of Mormon translation, Kosovo seeking independenc... From: Prepare to Serve Views: 1 1 ratings Time: 13:57 More in Travel & Events
      • #MovieClubStrikesBack History in the Movies
        #MovieClubStrikesBack History in the Movies MovieClubStrikesBack History in the Movies. From: MovieClubStrikesBack Views: 19 4 ratings Time: 01:26:01 More in Entertainment
      • Minecraft Xbox 360: History In The Making!
        Minecraft Xbox 360: History In The Making! Hello guys what is going on? In todays video I am going to be showing you mine and Georrgie's creative world. We made this in the summer of 2013! It's also a hunger games map! A very big one!... From: BrandonDoesMinecraft Views: 0 0 ratings Time: 23:29 More in Gaming
      • YUGOSLAVIA's History in the Eurovision Song Contest 1961 1992
        YUGOSLAVIA's History in the Eurovision Song Contest 1961 1992 Ahivski trezor. From: Rock The Tube Views: 1 0 ratings Time: 09:03 More in Entertainment
      • Hollywood Movies: Top 10 Highest Grossing Films
        Hollywood Movies: Top 10 Highest Grossing Films In the history of Hollywood movies, the top two highest-grossing movies have directed and written by James Cameron. And these two movies have earned more than $2 billion worldwide. According... From: News For Interest Views: 6 0 ratings Time: 03:00 More in Entertainment
      • History In The Making Recap
        History In The Making Recap Pretty much a recap of the "History In The Making" event July 25th, 2014 in Springfiel, IL Tried my best to keep it 100 about everything... Enjoy. From: Leroy Newbon Jr Views: 1 1 ratings Time: 20:52 More in People & Blogs
      • Weather History in 3 Minutes of 10 Years in the Making
        Weather History in 3 Minutes of 10 Years in the Making http://tinyurl.com/World-Zapper NOAA's GOES-12 satellite was decommissioned on August 16th, 2013 after 3788 days in service. From April 2003 -- May 2010, GOES-12 served as GOES East, providing... From: Esmeralda Gonzalez Views: 2 1 ratings Time: 03:07 More in People & Blogs
      • History in the making!!
        History in the making!! A little taste for ya! From: Fredro Nelson Views: 0 0 ratings Time: 01:36 More in People & Blogs
      • THE XALO STORY - HISTORY IN THE MAKING
        THE XALO STORY - HISTORY IN THE MAKING In business and in life timing is everything. In late 2002 a small startup company named XANGO launched a category creating product into the market place and against all of the odds was able... From: Armando DeGuzman Views: 0 0 ratings Time: 29:47 More in Entertainment
      • Society for History in the Federal Government 2014
        Society for History in the Federal Government 2014 The SHFG held their annual conference at the Byrd Center in April of 2014. Their Trask Lecture (keynote) was given by Charlene Bangs-Bigford about her work documenting the first Congress of... From: Byrd Center for Legislative Studies Views: 0 0 ratings Time: 52:28 More in Education
      • Non-Eviction in Nottingham. History in the Making!
        Non-Eviction in Nottingham. History in the Making! Big Brothers Big Eviction: A historical moment for the truth movement. From: Daniel Bostock Views: 4515 220 ratings Time: 39:26 More in Entertainment
      • THE XALO STORY - HISTORY IN THE MAKING
        THE XALO STORY - HISTORY IN THE MAKING In business and in life timing is everything. In late 2002 a small startup company named XANGO launched a category creating product into the market place and against all of the odds was able... From: Armando DeGuzman Views: 1 0 ratings Time: 29:25 More in Entertainment
      • THE XALO STORY - HISTORY IN THE MAKING
        THE XALO STORY - HISTORY IN THE MAKING In business and in life timing is everything. In late 2002 a small startup company named XANGO launched a category creating product into the market place and against all of the odds was able... From: Armando DeGuzman Views: 1 0 ratings Time: 30:55 More in Entertainment
      • THE XALO STORY - HISTORY IN THE MAKING
        THE XALO STORY - HISTORY IN THE MAKING In business and in life timing is everything. In late 2002 a small startup company named XANGO launched a category creating product into the market place and against all of the odds was able... From: Armando DeGuzman Views: 3 1 ratings Time: 26:03 More in Entertainment
      • THE XALO STORY - HISTORY IN THE MAKING
        THE XALO STORY - HISTORY IN THE MAKING In business and in life timing is everything. In late 2002 a small startup company named XANGO launched a category creating product into the market place and against all of the odds was able... From: Armando DeGuzman Views: 4 1 ratings Time: 24:52 More in Entertainment
      • THE XALO STORY - HISTORY IN THE MAKING
        THE XALO STORY - HISTORY IN THE MAKING In business and in life timing is everything. In late 2002 a small startup company named XANGO launched a category creating product into the market place and against all of the odds was able... From: Armando DeGuzman Views: 5 2 ratings Time: 12:30 More in Entertainment
      • THE XALO STORY - HISTORY IN THE MAKING
        THE XALO STORY - HISTORY IN THE MAKING In business and in life timing is everything. In late 2002 a small startup company named XANGO launched a category creating product into the market place and against all of the odds was able... From: Armando DeGuzman Views: 9 1 ratings Time: 29:41 More in Entertainment
      • Teaching history in the 21st century : Thomas Ketchell at TEDx Liege
        Teaching history in the 21st century : Thomas Ketchell at TEDx Liege Thomas Ketchell, 25 years old, was born in St. Leonards-On-Sea (UK) but grew up in France and Belgium. After working in Australia for a year, he went on to c... From: TEDx Talks Views: 830 16 ratings Time: 09:01 More in Nonprofits & Activism

      More on answers.yahoo.com

      More on Pubmed

        More on Answers.com