Originally published at: Erasable pens and highlighters | Boing Boing
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No, if you get them hot enough the ink vanishes. The fun part is that if you get them cold again, the ink reappears.
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So permanent?
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We use these for fabric marking when sewing. Ironing the fabric is a good way to make the ink vanish, too.
Do not use on anything that is to be laminated later on.
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I also use them to mark text and to do list/journal.
I have an issue with the black being grey and never actually managed to make the ink reappear… how cold do you actually have to do it?
Sort of!
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My freezer worked. Mind you, it didn’t come back 100%.
Care to share why? Do they interfere with the laminating process or are you refering to the “because it will erase them, du’ah” part. Sorry, I can be dense and miss obvious implications.
Yup, it’s the heat. And the effect is somewhat unpredictable, anything from complete “erasure” to just getting a bit pale.
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I use them with the Rocketbook system and love the combo. However I fill the books too fast and never have time to upload them. Sooo, more books is obviously the answer. 
On the flip side, on the rare (rare) occasion I have to write out a paper check, I have a note on the top that says “use real ink!!”.
Intermittent.
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Thank you.
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