These pens from Pilot erase by friction, and are a breakthrough in erasable ink technology! The pens have a special rubber end to rub the thermo sensitive ink away with, thus no eraser by-products are produced, yet the ink disappears magnificently. The pen writes smoothly, in vibrant colors, and erases without a trace! Interestingly enough, the ink in these pens will actually reappear when the temperature reaches below – 10 C (under 14 Fahrenheit). A freezer is sufficiently cold enough to make the ink start to reappear. It is like a magic pen for adults! Because the ink in this pen is thermo sensitive, we do not advise for it to be left in hot cars, used for mailing, or subjected to a condition that exposes it to a lot of friction.

• The Ink In These Pens Will Actually Reappear When The Temperature Reaches Below – 10 C (Under 14 Fahrenheit)
• A freezer is sufficiently cold enough to make the ink start to reappear. It is like a magic pen for adults! Because the ink in this pen is thermo sensitive, we do not advise for it to be left in hot cars, used for mailing, or subjected to a condition that exposes it to a lot of friction.

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