To start off the new year, I’m officially announcing the launch of my second publishing company, Endless Sky Books. Whereas my first publishing company, Shadowpaw Press, is and always will be a traditional publishing company, …
For the first time, you can now buy the entire Shards of Excalibur series in a single omnibus ebook! Just released by Shadowpaw Press, this includes the latest editions of the books, and costs only half …
The Tangled Stars, my far-future humorous space opera from DAW Books, is now available everywhere in ebook and audiobook (narrated by Wayne Mitchell). For an introduction to the main characters, check out “Thibauld’s Tale” in …
Shapers of Worlds Volume III, the third anthology I’ve Kickstarted that features science fiction and fantasy by authors who were guests on my Aurora Award-winning podcast, The Worldshapers, has now officially been released upon the …
This is the latest in my occasional column about writing science fiction and fantasy that appears in the Saskatchewan Writers Guild magazine Freelance. Authors who are regularly interviewed often profess to hate one particular question, …
At When Words Collide 2022, one of the panels I led featured a handful of the many authors whose stories have appeared in the Shapers of Worlds anthologies I Kickstarted (and who have also, of …
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Not just lemon juice
Two Michigan State University researchers have unlocked the secret invisible-ink formula used by the former East Germany secret police, the Stasi:
The Stasi’s technique of transferring top-secret messages worked like a piece of carbon paper. An agent would place a piece of paper impregnated with the chemical cerium oxalate between two pieces of plain paper. As the agent pressed down to write, the chemical was transferred to the piece of paper beneath.
The person on the receiving end of the message then developed the note with a solution of manganese sulfate, hydrogen peroxide and other chemicals. The process activated the cerium oxalate to reveal the hidden text. A successful reaction yielded orange writing.
Permanent link to this article: https://edwardwillett.com/2006/11/not-just-lemon-juice/
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