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How invisible ink pens were invented

How invisible ink pens were invented | WHEN YOU ARE TRYING TO SELL PENS WITH NO INK; AND YOU HAVE TO THINK ON THE FLY TO CONVINCE THEM IT'S ACTUALLY INVISIBLE INK | image tagged in grunkle stan's advice | made w/ Imgflip meme maker
54 views • 3 upvotes • Made by JPfan102504 2 years ago in MEMES_OVERLOAD
grunkle stan's advice
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IMAGE DESCRIPTION:
WHEN YOU ARE TRYING TO SELL PENS WITH NO INK; AND YOU HAVE TO THINK ON THE FLY TO CONVINCE THEM IT'S ACTUALLY INVISIBLE INK