Ink color disappears when temperature reaches over 60 C (140 Fahrenheit). Interestingly enough, the ink in these pens will actually reappear when the temperature reaches below 0 C (under 32 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!
|Model Number||UNI UF20205.6|
|Diameter - Grip||8.9 mm|
|Diameter - Max||10.7 mm|
|Grip Color||Transparent Green|
|Length - Capped||13.8 cm|
|Length - Posted||15.3 cm|
|Length - Uncapped||13.3 cm|
|Pre-Installed Ink Color||Green|
|Tip Length||4.4 mm|
|Tip Size||0.5 mm|