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Invisible ink is sometimes used to print parts of pictures or text in books for children to play with, always including a "decoder pen" which is used to show the invisible parts of texts or pictures, thus revealing answers to questions printed in regular ink or completing missing parts of pictures.
The app has been updated to include many visual effects. Chat bubbles, for example, can be sent with a "loud" or "gentle" animation that the recipient sees upon receiving. "Invisible ink" effect obscures the message until the recipient swipes across it. Full-screen effects like balloons, confetti or fireworks can be sent.
The decoder pen, yes-no pen, yes-know pen or magic pen book is a combination of decoder pen or marker specially designed to reveal invisible ink-encoded pictures or writing, [1] in the form of answers to questions or hidden parts of pictures, with specially created children's books with hidden words and pictures. They were most popular in the ...
Brian Keith McDonald (born February 18, 1965) [1] is an American screenwriter, director, teacher and author, who lives in the state of Washington.McDonald is best known for the books Invisible Ink, The Golden Theme and Ink Spots, [2] and for the short film White Face.
The clues were not written in invisible ink, which made it easy to accidentally get answers to puzzles. Some of the hints were missing; There were many errors, such as misspellings, mis-capitalizations, formatting issues, and punctuation errors. The clues were not included with The Lost Treasures of Infocom II. However, there was a pay-per ...
Aburidashi is a ninja technique of sending secret messages using a form of invisible ink. [1] The technique uses ink made of juice extracted from soaked and crushed soybeans . [ 1 ] The message becomes visible to the recipient by heating the paper.
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Scantegrity II ballot and decoder pen. Left: Unmarked optical scan bubble. Right: Marked optical scan bubble revealing confirmation code "FY" The Scantegrity II voting procedure is similar to that of a traditional optical scan voting system, except that each voting response location contains a random confirmation code printed in invisible ink. [4]