erasable

13d

Interesting infographic by @compoundchem on friction-erasable pens.

Original link at C&EN [ https://cen.acs.org/physical-chemistry/periodic-graphics-erasable-pen-ink/104/web/2026/09 ]

#Infographics #Chemistry #Ink #Pens #Erasable

An infographic describing the chemistry of friction erasable pens. A summary: the pens use Leuco dye, which is coloured at room temperature. The friction from the pen raises the temperature of the dye, which turns it colourless. If the ink is cooled, it can reappear.

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