Friday, April 1, 2011

Awesome idea: Secret agent printing technique

Craftzine borrowed some hackery spirit from its Makezine cousin to report this printer cartridge hack that allows you to print secret messages in lemon juice! The message is revealed by ironing the paper or spritzing it with iodine.

Can't you see this as an interactive effect on your coloring book pages? By the way, this video has a really nice production value.

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