• justastranger
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    1 year ago

    Fun fact: these pens don’t actually erase, they just use heat to become invisible

        • rustyricotta@lemmy.ml
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          1 year ago

          It’s neat for writing fun secret messages. Just hold it above your stove or other heat source to easily erase the entire page, then have the recipient put it in the freezer a bit.

          But yeah, don’t write anything too important.