PILOTFrixion Ball 4, four colour pen, 0.5 mm, Eco-Bundle, black, 1

Absolutely brilliant pen. Writes very smoothly, the eraser is just perfect with no trace of pen written after. It’s slightly expensive though but, it’s true in life that you get what you pay for.

I was forever using notes and post its for craft and designing notes etc, so decided to get a reusable notebook from Rocketbook, and they recommend these pens. I like this one because of its bigger diameter which I find more comfortable to write with. The addition of the spare set of refills was great too. Just be warned about using these normally - my niece used the pen to write her physics homework in, and lent her friend another halfway through hers. Unfortunately it was the height of coronavirus so the lecturer microwaved her marking, so blanking out everything my niece and her friend had written! Fortunately she gave her the benefit of the doubt. You can freeze the notes to restore the ink, but she didnt know this at the time. So basically great pens, but be careful not to leave stuff where it can get too hot, like in a hot car! Used safely for notes, and photographed quickly for storage using the Rocketbook app, and they are brilliant!