Lamy Blue bottled ink (Lamy model name T51) is a medium-light blue color equally appropriate for school and office. This is a washable ink. It could be deleted with ink eraser or washed out completely from paper or any other surfaces.
Lamy 30 ml bottles have a little basin at the bottom to help you with filling your pen when the ink level is running low.
Suitable for any fountain pens, including vintage and rare ones.