Ink Eradicator Pens
An ink eradicator pen is used to erase blue ink that is described as washable or erasable ink from paper. They work by bleaching out the colour of the ink on the paper. Typical washable ink is used in pens such as the Stabilo Easy range or Parker Quink washable. Once you have erased the writing you cannot rewrite with a washable ink pen as it will disappear so you will need to use another pen. The Stabilo Point 88 is blue is often used to write over with.
Ink eradicator pens will not erase ink from erasable pens like the Pilot Frixion and the Paapermate Replay max as their ink is thermosensitive and erased by frixion.