I use a Parker fountain pen with washable ink refills and this product works very well. On a side note; you erase the mistake (fountain pen ink) using the white end of the pen and then write over it with the blue end of the pen. You cannot erase the blue ink from the pen, obviously.
This product is fantastic. Every child - and in fact, every pen user - should have one. This is not like a traditional ink rubber. It doesn't remove the top layer of paper along with the ink or seem to damage the paper in any way, and it works like a charm. Just swipe over the ink you want to erase and it disappears first go. It's pure magic. No more ugly crossings out, just the best pieces of work you or your child can produce. On the other end of the pen is an overwriter in blue so you can write over the erased area without the ink bleeding everywhere. I don't know how long this will last, but it is cheap as chips, so even if it only lasts a term, it is money well spent in my view. In summary:
* Erases ink like magic (I only tried it out on Lamy ink-cartridge ink, not on other manufacturers' inks) * Just draw over the ink and the ink vanishes straight away * No rubbing or scrubbing required * No mess * No visible damage to the paper * Use the blue overwriter pen if you need to ink over the area that has been erased * Cheap
We call these correcter pens 'inky stinkys' although there's nothing stinky about this pen. It does the job perfectly and does not turn the ink purple like alternative correctors sometimes do. If splashing out on a lamy fountin pen you may as well buy this too. A great accompaniment