Silly! When it's not invisible anymore!
2007-08-10 06:46:00
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answer #1
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answered by Anonymous
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You get a UV Light and it will show that the letter you just wrote the pen is out of ink I went to a spy musem
but for a silly answer you never run out because its invisible
2007-08-10 13:45:54
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answer #2
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answered by Anonymous
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Actually your paper will catch fire when you are out of Invisible Ink.
2007-08-10 14:27:19
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answer #3
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answered by Anonymous
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when your paper stop having invisible lines
2007-08-10 13:47:28
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answer #4
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answered by Hornet One 7
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My alarm goes off. It's very handy for that sort of thing.
2007-08-10 15:09:30
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answer #5
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answered by Anonymous
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You start to actually see what you're writing
2007-08-10 13:45:08
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answer #6
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answered by Ashley 4
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Hmmmmmm because we can see what we are writing with.
2007-08-10 17:09:40
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answer #7
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answered by C * 4
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That's the beauty of it. You can't.
2007-08-10 13:46:56
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answer #8
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answered by Darla 5
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when u can't feel the 'wetness' anymore
2007-08-10 13:45:19
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answer #9
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answered by Anonymous
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you just know
trust yourself
2007-08-10 23:18:25
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answer #10
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answered by . 5
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