Top critical review
Waste of time, buy a pen that doesn't go invisible!
Reviewed in the United States on January 15, 2019
Wouldn't recommend these unless you are wanting to write invisible letters or are a magician!!
Bought these pens to be used with a Rocketbook. The Rocketbook itself is great, however, the Pilot Frixion Pens that are required to use the notebook are terrible!
Since leaving the Rocketbook and pens in my handbag in the car for a few hours I have discovered that the pens are heat sensitive. Heat (this can be as little as photocopying the page a few times!!) makes the ink invisible on the page. Apparently the ink does reappears at around -10°C, but not entirely practical unless you can also carry around your freezer! Great turning up to meetings and all your notes have vanished!
The pens also don't work after being exposed to "extreme" heat, I would love to live in a climate that gets warm enough to be called extreme heat, but unfortunately I don't!! The pens were in my car late afternoon on a day that I wore a sweater! I was advised to also put the pens in the freezer and they "should write again like new", they don't! The ink is no longer invisible, but it is now very faint.
Wouldn't buy these again, unfortunately it also makes the Rocketbook pointless!